ABSTRACT This study took place
in a forensic center for rape victims. The authors
aims were: first, to explore the longitudinal course
of post-traumatic stress disorder (PTSD) and prevalence
of disorders over the 6-month period following rape,
then second, to group these disorders into syndromes
related to chronic PTSD while remaining distinct from
it, and third, to establish some predictive factors
for chronic PTSD. 92 rape victims consecutively admitted
to the center were regularly interviewed over a 6-month
period by a psychiatrist. The paper confirms that
rape leads to a high proportion of PTSD. Generally
speaking, the psychopathology following rape is severe.
PTSD at 6 months is associated with phobic and dissociative
disorders. It is further associated with a cluster
of symptoms arising after rape that the authors term
borderline-like. Incestuous rape is a predictive factor
for PTSD at 6 months. In the aftermath of rape several
semiologically distinct psychotraumatic syndromes
exist.
Darves-Bornoz, J.M.,
Degiovanni, A., & Gaillard, P. (1999). Validation of a French version of the Dissociative
Experiences Scale in a rape-victim population Canadian Journal of Psychiatry, 44, 271-275.
ABSTRACT Assessed the construct validity
and internal consistency of a French version of the
28-item, self-rated Dissociative Experiences Scale
(DES) in a sample of 140 rape victims (mean age 23.6
yrs, 9% male) consecutively attending a Consultation
for Victims of Psychological Trauma at the University
Hospital in Tours, France. The mean score (24.1) was
high, and 33% of the scores exceeded a threshold set
at 30. The Principal Components Analysis of the DES
ratings yielded a 3-factor solution: depersonalization-derealization,
amnestic fragmentation of identity, and absorption-imaginative
involvement. DES reliability was studied through computation
of Cronbach's alphacoefficient (0.94). The authors
conclude that during the validation of a French version
of the DES, this study showed that dissociation is
considerably linked to rape-trauma victim populations.
Darves-Bornoz JM ,Berger
C, Degiovanni A, Gaillard P, Lepine JP (1999).
Clinique Psychiatrique Universitaire,
Hopital Universitaire, Tours, France Similarities
and differences between incestuous and nonincestuous rape
in a French follow-up study. J Trauma Stress
1999 Oct;12(4):613-23
ABSTRACT Clinicians are familiar with the
life and psychological difficulties of incest victims,
but their observations often are refuted as being
retrospective and unsystematic. We aimed to ascertain
similarities and differences between incestuous rape
and nonincestuous rape. One hundred and two victims
consulting a French forensic center were interviewed
in a systematic follow-up study over 6 months using
structured interview schedules. Stepwise logistic
regression analysis adjusted for age, gender, and
characteristics of the trauma showed that posttraumatic
stress disorder, dissociative disorders, agoraphobia,
and low self-esteem were overrepresented in the incest-rape
group compared to the nonincest-rape group.
David, Daniel; Brown, Richard J. (2003).
The impact of different directed
forgetting instructions on implicit and explicit memory: New evidence from
a modified process dissociation procedure. Quarterly Journal of
Experimental Psychology A. Vol 56A(2) Feb 2003, 211-231
ABSTRACT(Dissociation referred to here is between implicit and explicit memory)In contrast to previous research on directed forgetting, the present
studies adopted a recent modification of the process dissociation procedure
to accommodate the cross-contamination of memory test performance by
implicit and explicit memorial factors. In Experiment 1, 120 subjects were
compared in global directed forgetting, item-by-item directed forgetting,
and control conditions on estimates of voluntary conscious memory,
involuntary conscious memory, and involuntary unconscious memory
performance. In Experiment 2, 80 subjects were compared in specific
directed forgetting and control conditions on estimates of voluntary
conscious memory, involuntary conscious memory, and involuntary unconscious
memory performance. Subjects showed significant decrements in voluntary and
involuntary conscious memory performance following instructions for
directed forgetting in all conditions. None of the directed forgetting
conditions showed a decrement in involuntary- unconscious memory
performance. Results suggest that, regardless of instruction type, directed
forgetting prevents the conscious expression of memorial information (both
voluntary and involuntary) while leaving unconscious memory intact.
David, D., Kutcher,
G.S., Jackson, E.I., & Mellman, T.A. (1999).
Psychotic symptoms in combat-related posttraumatic
stress disorder. Journal of Clinical Psychiatry,
60, 29-32.
ABSTRACT This study's objectives were to
assess psychotic symptoms according to Mental Disorders-III-Revised
(DSM-III-R) criteria in patients with a primary diagnosis
of combat-related posttraumatic stress disorder (PTSD)
and determine the associations of those symptoms with
psychiatric comorbidity and ethnicity. 53 male combat
veterans (aged 26-63 yrs) consecutively admitted to
a PTSD rehabilitation unit were assessed for psychotic
symptoms and Axis I disorders. 40% of patients reported
a psychotic symptom or symptoms in the preceding 6
mo. These symptoms featured auditory hallucinations
in all but 1 case. The psychotic symptoms typically
reflected combat-themes and guilt, were nonbizarre,
and were not usually associated with formal thought
disorder or flat or inappropriate affect. Psychotic
symptoms were significantly associated with current
major depression, but not with alcohol or drug abuse
or with self-rated PTSD and dissociation severity.
Davidson,
Jonathan R T; Rothbaum, Barbara Olasov; Van der Kolk,
Bessel A; Sikes, Carolyn R; Farfel, Gail M. (2001).
Multicenter, double-blind comparison of sertraline
and placebo in the treatment of posttraumatic stress
disorder Archives of General Psychiatry (ISSN: 0003-990X),
v. 58, no. 5, pp. 485-492 (May 2001).
ABSTRACT BACKGROUND: PTSD is a common illness
associated with significant disability. Few large,
placebo-controlled trials have been reported. METHODS:
Outpatients with a DSM-III-R diagnosis of moderate-to-severe
PTSD were randomized to 12 weeks of double-blind treatment
with either sertraline (N = 100) in flexible daily
doses in the range of 50 to 200 mg or placebo (N =
108). Primary outcome measures consisted of the Clinician-Administered
PTSD Scale (CAPS-2) total severity score, the patient-rated
Impact of Event Scale (IES), and the Clinical Global
Impression-Severity (CGI-S) and -Improvement (CGI-I)
ratings. RESULTS: Mixed-effects analyses found significantly
steeper improvement slopes for sertraline compared
with placebo on the CAPS- 2 (t = 2.96, P = .003),
the IES (t = 2.26, P = .02), the CGI-I score (t =
3.62, P < .001), and the CGI-S score (t = 4.40, P
< .001). An intent-to-treat end- point analysis found
a 60 percent responder rate for sertraline and a 38
percent responder rate for placebo (chi-square [subscript-1]
= 8.48, P = .004). Sertraline treatment was well tolerated,
with a 9 percent discontinuation rate because of adverse
events, compared with 5 percent for placebo. Adverse
events that were significantly more common in subjects
given sertraline compared with placebo consisted of
insomnia (35 percent vs 22 percent), diarrhea (28
percent vs 11 percent), nausea (23 percent vs 11 percent),
fatigue (13 percent vs 5 percent), and decreased appetite
(12 percent vs 1 percent). CONCLUSION: The results
of the current study suggest that sertraline is a
safe, well-tolerated, and significantly effective
treatment for PTSD.
Davies,
J.M. (1999). Getting cold feet, defining "safe enough"
borders: Dissociation, multiplicity, and integration
in the analyst's experience Psychoanalytic Quarterly, 68, 184-208.
ABSTRACT This paper attempts to explore the
fate of the analyst's multiple self/other organizations
during times of heightened countertransferential enactment.
It is suggested that such countertransference activity
involved the "de-homogenization" of otherwise
indecipherable integrated self/other constellations,
evoked independently or in response to, but always
in interaction with, the patient's own unique organization
of multiple centers of psychic awareness and unconscious
receptivity. An extended clinical example is used
to illustrate the theoretical conceptualization.
ABSTRACT Previous investigations suggest
that maltreated children with a diagnosis of posttraumatic
stress disorder (PTSD) evidence alterations of biological
stress systems. In this study, 44 maltreated children
and adolescents (aged 6.7-17 yrs) with PTSD and 61
healthy matched controls underwent comprehensive psychiatric
and neuropsychological assessments and an anatomical
magnetic resonance imaging (MRI) brain scan. Results
show that PTSD Ss had smaller intracranial and cerebral
volumes than matched controls. The total midsagittal
area of corpus callosum and middle and posterior regions
remained smaller; while right, left, and total lateral
ventricles were proportionally larger than controls,
after adjustment for intracranial volume. Brain volume
robustly and positively correlated with age of onset
of PTSD trauma and negatively correlated with duration
of abuse. Symptoms of intrusive thoughts, avoidance,
hyperarousal or dissociation correlated positively
with ventricular volume, and negatively with brain
volume and total corpus callosum and regional measures.
It is concluded that the overwhelming stress of maltreatment
experiences in childhood is associated with adverse
brain development.
DePrince PhD, Anne P. (2005) Social Cognition and Revictimization Risk Journal of Trauma and Dissociation; Vol 6 nr. 1., 125 - 141 2005
ABSTRACT The ability to accurately detect violations in social contracts likely helps people to avoid or to withdraw from relationships in which they are at risk of being cheated or harmed. Betrayal trauma theory argues that detecting violations of social contracts may be counter-productive to survival under certain conditions, such as when a victim is dependent on a perpetrator. When dependent on a perpetrator (as in the case of child abuse perpetrated by a caregiver), the victim may be better able to preserve the necessary attachment with the caregiver by remaining unaware of the abuse. Thus, the victim may develop a compromised capacity to detect violations of social contracts in the caregiving relationship. Over time, the victim may develop more generalized problems detecting violations in social exchange rules; in turn, generalized problems in detecting violations of social contracts may increase risk for later victimization. Participants in the current study were asked to detect violations in three types of conditional (if-then) rules: abstract, social contract (rules involving a social exchange), and precautionary (rules involving safety). Young adults who reported experiences of revictimization made more errors on social contract and precautionary problems than a no revictimization group; group performance did not differ for abstract problems, suggesting these findings are not explained by general deficits in conditional reasoning. Pathological dissociation significantly predicted errors on social contract and precautionary problems.
Dell,
Paul F. (2002) Dissociative phenomenology of dissociative identity
disorder J Nerv Ment Dis 2002 Jan;190(1):10-5
ABSTRACT The goal of this study was to investigate
the dissociative phenomenology of dissociative identity
disorder (DID). The Multidimensional Inventory of
Dissociation (MID) was administered to 34 patients
with DID, 23 patients with dissociative disorder not
otherwise specified (DDNOS), 52 patients with mixed
psychiatric disorders, and 58 normal individuals.
DID patients obtained significantly higher scores
than the other three groups on 27 dissociation-related
variables. DDNOS patients had significantly higher
scores than normals and mixed psychiatric patients
on 17 and 15 dissociation-related variables, respectively.
The findings of the present study are virtually identical
to a large body of replicated findings about the dissociative
phenomenology of DID. This broad range of dissociation-related
phenomena, which routinely occurs in individuals with
DID, is largely absent from the DSM-IV-TR account
of DID. Factor analysis of the 11 dimensions of dissociation
that are measured by the MID extracted only one factor
that accounted for 85% of the variance. It was concluded
that dissociation is a unifactorial taxon or natural
type that has different aspects or epiphenomena (i.e.,
amnesia, depersonalization, voices, trance, etc.).
Dell,
Paul F. (2001) Why the diagnostic criteria for dissociative identity
disorder should be changed. Journal of Trauma and Dissociation (ISSN: 1529-9732),
v. 2, no. 1, pp. 7-37 (2001).
ABSTRACT This paper examines the psychiatric
diagnosis of dissociative identity disorder (DID)
in light of the developments in psychiatric classification
that have guided the last four revisions of the Diagnostic
and Statistical Manual for Mental Disorders (DSM).
The author argues that multiple personality's passage
from DSM-III, through DSM-III-R, to its current form
as DID in DSM-IV-TR has left the diagnosis out of
step with the state of the art of psychiatric classification.
Ten disadvantages of the DSM-IV-TR criteria for DID
are identified. The DSM-IV-TR criteria for DID: (1)
are out of step with the state of the art of psychiatric
classification; (2) are not based on taxometric analysis
of the symptoms of DID; (3) incorrectly imply that
DID is a closed concept; (4) have poor content validity;
(5) throw away important information; (6) discourage
taxonomic research; (7) have poor reliability and
cause frequent misdiagnoses; (8) are not "user-friendly";
(9) are unnecessarily controversial: and (10) along
with previous versions of the DSM, have produced an
artifactually low base-rate of DID for the past 20
years. In an effort to remedy these disadvantages,
a reliable, user-friendly, polythetic set of diagnostic
criteria for "Major Dissociative Disorder" is proposed
for DSM-V. Using these polythetic criteria, the dissociative
disorders (presently conceptualized as Dissociative
Amnesia, Dissociative Fugue, DID, Depersonalization
Disorder, and Dissociative Disorder Not Otherwise
Specified) can be restructured into an easily understood
and more reliable set of diagnostic entities. This
alternate nosology of the dissociative disorders consists
of Simple Dissociative Disorder (with at least three
subtypes), Generalized Dissociative Disorder, Major
Dissociative Disorder (with two subtypes), and Dissociative
Disorder Not Otherwise Specified.
DePrince, Anne P; Freyd, Jennifer J. (2001) Memory and dissociative tendencies:
The roles of attentional context and word meaning in a directed forgetting
task Journal of Trauma & Dissociation. Vol 2(2) 2001, 67-82.
ABSTRACT Examined cognitive correlates of dissociative tendencies and considered the
results in the context of theory-building in the dissociation and traumatic
stress literature. The current study is a replication and extension of
research by R. J. McNally et al (1998). Ss were undergraduate students
selected based on their performance on the Dissociative Experiences Scale
(DES): 28 Ss (mean age 19 yrs) were high-scorers (score>=20) and 28 Ss
(mean age 21 yrs) were low-scorers (score<=10). Ss performed a computerized
directed forgetting task using trauma, neutral, and positive words that
they were directed to either remember or forget. Words were randomly
assigned to 3 blocks, each of which was paired with 1 of 3 attention
conditions: selective attention; divided attention with key press; and
divided attention with voice response. Each block was viewed 3 times by
each S and presented in a random order. After viewing all word blocks, Ss
performed free recall and recognition tests. Results show differences
between high- and low- DES scorers during the divided attention with key
press condition. Consistent with prior research, when divided attention was
required, high-scoring DES Ss recalled fewer trauma and more neutral words
than did low-scoring DES Ss, who showed the opposite pattern.
ABSTRACT Two groups of college students were
selected on the basis of their scores on the Dissociative
Experiences Scale (DES). The high-DES group and low-DES
group both completed the standard and a new dual-task
version of the Stroop ink-naming task with xs (baseline
condition) and color, neutral, and emotionally charged
words. Free recall results indicated that high-DES
participants remembered fewer emotionally charged
words than low-DES participants. We found a crossover
interaction for Stroop interference: High-DES participants
showed more interference (conflicting color--baseline
latency for ink naming) in a selective-attention Stroop
task and less interference in the dual-task Stroop
task. The interaction between attentional context
and dissociation for Stroop interference and the free
recall results are consistent with a cognitive-environments
view of dissociative tendencies. In this view, dissociative
tendencies, which have been otherwise speculated to
be largely deleterious, can be advantageous in certain
contexts.
Di Scala C (2000)
Child Abuse and Unintentional Injuries:
A 10-Year Retrospective Arch Pediatr Adolesc
Med. 2000 Jan;154(1):16-22
ABSTRACT Objective: To identify differences
between hospitalized children injured by child abuse
and those with unintentional injuries. DESIGN: Comparative
analysis of patients injured by child abuse (n = 1997)
with patients injured unintentionally (n = 16 831),
newborn to 4 years of age. Main Outcome Measures:
Patient characteristics, nature and severity of injury,
treatment, length of stay, survival, functional limitations,
and disposition at discharge from the hospital. Data
Source: Retrospective review of medical records submitted
to the National Pediatric Trauma Registry between
January 1, 1988, and December 31, 1997. Results: During
the 10-year study period, child abuse accounted for
10.6% of all blunt trauma to patients younger than
5 years. Children injured by child abuse were significantly
younger (mean, 12.8 vs 25.5 months) and were more
likely to have preinjury medical history (53% vs 14.1%)
and retinal hemorrhages (27.8% vs 0.06%) than children
with unintentional injuries. Abused children were
mainly injured by battering (53%) and by shaking (10.3%);
unintentionally injured children were hurt mainly
by falls (58.4%) and by motor vehicle-related events
(37.1%). Abused children were more likely than unintentionally
injured children to sustain intracranial injury (42.2%
vs 14.1%) and thoracic (12.5% vs 4.5%) and abdominal
(11.4% vs 6.8%) injuries; to sustain very severe injuries
(22.6% vs 6.3%); to be admitted to the intensive care
unit (42.5% vs 26.9%); and to receive Child Protective
Services (82.3% vs 8%) and Social Services (72.9%
vs 27.6%) intervention. The mean length of stay for
children who were abused was significantly longer
(9.3 vs 3.8 days) and the survival to discharge from
the hospital was significantly worse (87.3% vs 97.4%)
than for those unintentionally injured. Among the
survivors, children who were abused developed extensive
functional limitations more frequently than those
unintentionally injured (8.7% vs 2.7%). More than
half (56.6%) of the children who were abused were
discharged to custodial/foster/Child Protective Services
care; most (96.1%) of the children unintentionally
injured returned to their homes. Conclusions: Child
abuse continues to be a serious cause of mortality
and morbidity to infants and toddlers. On average,
among children hospitalized for blunt trauma, those
injured by abuse sustain more severe injuries, use
more medical services, and have worse survival and
functional outcome than children with unintentional
injuries.
Dorahy, Martin J;
Irwin, Harvey J; Middleton, Warwick (2004) Assessing markers of
working memory function in dissociative identity disorder using neutral
stimuli: A comparison with clinical and general population samples. Australian & New Zealand Journal of Psychiatry. Vol
38(1-2) Jan 2004, 47-55.
ABSTRACT Memory dysfunction is a central
feature of dissociative identity disorder (DID). Following
the memorial anomalies outlined by Putnam [Putnam,
F. W. (1994). Dissociation and disturbances of self.
In: D. Cicchetti & S. L. Toth (Eds.), Disorders
and dysfunctions of the self, vol. 5 (pp. 251-265).
Rochester, NY: University of Rochester Press; Putnam,
F. W. (1995). Development of dissociative disorders.
In: D. Chicchetti & D. J. Cohen (Eds.), Developmental
psychopathology, vol. 2 (pp. 581-608). New York: Wiley],
the experimental research using DID case studies and
samples is reviewed. As a whole, research suggests
that amnesic barriers between alter personalities
are typically impervious to explicit stimuli, as well
as conceptually driven implicit stimuli. Autobiographical
memory deficits are also experimentally evident in
DID. Although no experimental studies have addressed
the issue of source amnesia or pseudomemories, there
is some evidence that pseudomemories are an infrequent
but real phenomenon in DID patients. Finally, potential
deficits in working memory are outlined, including
those relating to cognitive inhibition. Research directions
are discussed throughout to further elucidate the
nature of memory dysfunction in DID.
Dorahy MJ. (2001)
School of Psychology,
University of New England, Armidale, 2351, NSW, Australia.
mdorahy@metz.une.edu.au Dissociative identity
disorder and memory dysfunction: the current state of
experimental research and its future directions. Clin Psychol Rev 2001 Jul;21(5):771-95
ABSTRACT Memory dysfunction is a central
feature of dissociative identity disorder (DID). Following
the memorial anomalies outlined by Putnam [Putnam,
F. W. (1994). Dissociation and disturbances of self.
In: D. Cicchetti & S. L. Toth (Eds.), Disorders
and dysfunctions of the self, vol. 5 (pp. 251-265).
Rochester, NY: University of Rochester Press; Putnam,
F. W. (1995). Development of dissociative disorders.
In: D. Chicchetti & D. J. Cohen (Eds.), Developmental
psychopathology, vol. 2 (pp. 581-608). New York: Wiley],
the experimental research using DID case studies and
samples is reviewed. As a whole, research suggests
that amnesic barriers between alter personalities
are typically impervious to explicit stimuli, as well
as conceptually driven implicit stimuli. Autobiographical
memory deficits are also experimentally evident in
DID. Although no experimental studies have addressed
the issue of source amnesia or pseudomemories, there
is some evidence that pseudomemories are an infrequent
but real phenomenon in DID patients. Finally, potential
deficits in working memory are outlined, including
those relating to cognitive inhibition. Research directions
are discussed throughout to further elucidate the
nature of memory dysfunction in DID.
Draijer N; Langeland
W (1999) Department of Psychiatry,
Vrije Universiteit, Amsterdam, The Netherlands. Childhood trauma and perceived parental dysfunction
in the etiology of dissociative symptoms in psychiatric
inpatients. Am J Psychiatry, 156(3):379-85
1999 Mar
ABSTRACT This study examined the level of
dissociation in relation to childhood trauma (sexual/physical
abuse, witnessing interparental violence), early separation
from a parent, and perceived parental dysfunction.
160 Ss (mean age 35.6 yrs) admitted to a psychiatric
hospital were given the Dissociative Experiences Scale
(DES) and the Structured Trauma Interview. The mean
DES score was 17.4; 18.0% of Ss scored beyond 30.
Early separation was reported by 26.4% of the patients;
30.1% had witnessed interparental violence; 23.6%
reported physical abuse; 34.6% reported sexual abuse;
11.7% reported rape before age 16; and 42.1% reported
sexual and/or physical abuse. The level of dissociation
was related to reported sexual and physical abuse.
When sexual abuse was severe, dissociative symptoms
were more prominent. Highest dissociation levels were
found in Ss reporting cumulative sexual trauma or
sexual and physical abuse. In particular, maternal
dysfunction was related to the level of dissociation.
Stepwise multiple regression analysis indicated that
severity of dissociation was predicted by sexual and
physical abuse and maternal dysfunction. These findings
indicate that dissociation is trauma- and neglect-related.
Draijer, N, &
Boon, S. (1999) The imitation of D.I.D.: patients
at risk, therapists at risk Journal of Psychiatry
and Law (fall-winter 1999)
Driessen M, Beblo
T, Mertens M, Piefke M, Rullkoetter N, Silva-Saavedra
A, Reddemann L, Rau H, Markowitsch HJ, Wulff H, Lange
W, Woermann FG. (2004) Posttraumatic stress disorder and fMRI activation patterns of traumatic memory in patients with borderline personality disorder.
Biol Psychiatry. 2004 Mar 15;55(6):603-11. doi:10.1016/j.biopsych.2003.08.018
ABSTRACT BACKGROUND: Early traumatization and additional posttraumatic stress disorder are frequent in patients with borderline personality disorder (BPD). The purpose of this study was to investigate neural correlates of traumatic memory in BPD with and without posttraumatic stress disorder (PTSD) using functional magnetic resonance imaging (fMRI). METHODS: We studied 12 traumatized female patients BPD, 6 of them with and 6 without PTSD. According to an autobiographical interview key words (cues) were defined for traumatic and for negative but nontraumatic episodes. In a block-designed fMRI task patients recalled these episodes. Contrasts between trauma condition and nontrauma condition were analyzed. RESULTS: Analyses for all subjects revealed activation of orbitofrontal cortex areas in both hemispheres, anterior temporal lobes, and occipital areas. In the subgroup without PTSD, activation of orbitofrontal cortex on both sides and Broca's area predominated. In the subgroup with additional PTSD, we observed right more than left activation of anterior temporal lobes, mesiotemporal areas, amygdala, posterior cingulate gyrus, occipital areas, and cerebellum. CONCLUSIONS: Dependent on absence or presence of additional PTSD different neural networks seem to be involved in the traumatic memory of patients with BPD.
Martin Driessen, MD,
PhD; Jörg Herrmann, MS; Kerstin Stahl, MS; Martin
Zwaan, MD, PhD; Szilvia Meier, MD; Andreas Hill, MD; Marita
Osterheider, MD; Dirk Petersen, MD, PhD (2000) Department of Psychiatry, Gilead
Hospital, Bethel, Remterweg 69-71, D-33617 Bielefeld,
Germany. Magnetic Resonance Imaging Volumes
of the Hippocampus and the Amygdala in Women With Borderline
Personality Disorder and Early Traumatization Arch Gen Psychiatry. 2000;57:1115-1122
ABSTRACT Background: Based on findings of
stress-induced neural disturbances in animals and
smaller hippocampal volumes in humans with posttraumatic
stress disorder), we hypothesized that patients with
borderline personality disorders (BPD), who often
are victims of early traumatization, have smaller
volumes of the hippocampus and the amygdala. We assumed
that volumes of these brain regions are negatively
correlated with traumatic experiences and with neuropsychological
deficits. METHODS:e studied 21 female patients with BPD
and a similar group of healthy controls. We performed
clinical assessments, a modified version of the Childhood
Trauma Questionnaire, and magnetic resonance imaging
volumetric measurements of the hippocampus, amygdala,
temporal lobes, and prosencephalon. Neuropsychological
testing included scales on which disturbances in BPD
were previously reported. RESULTS: The patients with BPD had nearly 16%
smaller volumes of the hippocampus (P<.001) and
8% smaller volumes of the amygdala (P<.05) than
the healthy controls. The results for both hemispheres
were nearly identical and were controlled for the
volume of the prosencephalon and for head tilts. The
volumes of the hippocampus were negatively correlated
with the extent and the duration of self-reported
early traumatization only when BPD and control subjects
were considered together. Levels of neuropsychological
functioning were associated with the severity of depression
but not with the volumes of the hippocampus.onclusion
In female patients with BPD, we found reduction of
the volumes of the hippocampus (and perhaps of the
amygdala), but the association of volume reduction
and traumatic experiences remains unclear.
Van Dyck R, Spinhoven
P (1997) Depersonalization and Derealization
During Panic and Hypnosis in Low and Highly Hypnotizable
Agoraphobics Int J Clin Exp Hypn 45(1):41-54,
1997
ABSTRACT The primary aim of the present study
was to investigate the association between spontaneous
experiences of depersonalization or derealization
(D-D) during panic states and hypnosis in low and
highly hypnotizable phobic individuals. Secondarily,
the association among level of hypnotizability, capacity
for imaginative involvement, and severity of phobic
complaints was also assessed. Sixty-four patients
with panic disorder with agoraphobia according to
the DSM-III-R (American Psychiatric Association, 1987)
criteria participated in the study. Proneness to experience
D-D during hypnosis was positively related to hypnotizability,
but only for agoraphobic patients who had already
experienced these perceptual distortions during panic
episodes. Correlations of level of hypnotizability
and capacity for imaginative involvement with severity
of agoraphobic complaints were not significant. These
findings suggest that hypnotizability may be a mediating
variable between two different, although phenotypically
similar, perceptual distortions experienced during
panic states and hypnosis. Implications for both theory
and clinical practice are discussed.
Buckner RL, Koutstaal
W (1998) Departments of Psychology,
Anatomy and Neurobiology, and Radiology, Washington University,
St. Louis, MO 63130, USA. Functional neuroimaging
studies of encoding, priming, and explicit memory retrieval.
Proc Natl Acad Sci U S A 1998 Feb 3;95(3):891-8
ABSTRACT Human functional neuroimaging techniques
provide a powerful means of linking neural level descriptions
of brain function and cognition. The exploration of
the functional anatomy underlying human memory comprises
a prime example. Three highly reliable findings linking
memory-related cognitive processes to brain activity
are discussed. First, priming is accompanied by reductions
in the amount of neural activation relative to naive
or unprimed task performance. These reductions can
be shown to be both anatomically and functionally
specific and are found for both perceptual and conceptual
task components. Second, verbal encoding, allowing
subsequent conscious retrieval, is associated with
activation of higher order brain regions including
areas within the left inferior and dorsal prefrontal
cortex. These areas also are activated by working
memory and effortful word generation tasks, suggesting
that these tasks, often discussed as separable, might
rely on interdependent processes. Finally, explicit
(intentional) retrieval shares much of the same functional
anatomy as the encoding and word generation tasks
but is associated with the recruitment of additional
brain areas, including the anterior prefrontal cortex
(right > left). These findings illustrate how neuroimaging
techniques can be used to study memory processes and
can both complement and extend data derived through
other means. More recently developed methods, such
as event-related functional MRI, will continue this
progress and may provide additional new directions
for research.