Lecture: Dissociative Disorder

DSM 5 definition of Dissociative disorders

dysfunction of consciousness, perception of surrounding, memory, identity

involuntary

often a coping mechanism for extreme stress

Who did lab tests for false memories, fantasy proness (dissociation)

Van den clout

who discovered link to sleep loss (dissociation)

Lynn

Dissociative Disorders of DSM 5

Dissociative Identity Disorder (DID)

Depersonalization Derealization Disorder (DDD)

Dissociative Amnesia, - Dissociative fugue

DDD prevalence, reasech, cause, inhibitted emotions

prev: Rare

Reaseach: little

Cause: follows stressful life event

inhibit certain emotions (selective), certain brain circuits inhibitted

Dissociative amnesia prev, onset, inhibited emotions

prev: 50% mild: once or episodes

onset: sudden

emotional modulation: brain cirucits inhibitted , hippocampus, limbic regions controlled by prefrontal cortex

hard wired to inhibit

what must you rule out with Dissociative amnesia

organic brain disorder

post concussion

due to substance 

malingering

DID prevelance

1% but controversial

50% heritablity from twin study (data inconsistent)

90% childhood trauma (questionable validity)

what to rule out with DID

schizophrenia

malingering

facticious disorder'

socially created (functional) symptoms

Models of DID

models as in potential causal models

biological

trauma

socio-cognitive model

trauma model of DID

model is that childhood trauma caused it. alters form to cope through situation 

bio model of DID

connection to epilepsy lie condition

overactive frontal brain regions

over modulated emotional regulation

smaller hippocampus, basal ganglia, and thalamus

Dysfunctional family'

High negative emotions

Fantasy and suggestibility proneness

critiques of DID trauma model

dissociation is a symptom of other disorders (so it actually just a more extreme ver of ptsd)

trauma: selection and refferal biases,family maladjustment

media influence increses cases from 70s-2000s

Amb psych symptoms

sleep disruoption → hallucinations

suggestive influence by therapist

media influence