CHAPTER 6 PSYCH Flashcards
A prototype psychotic illness characterized by
chronic course,
deterioration in social and occupational functions,
and positive (delusion, hallucination) and negative
(flat affect, alogia, avolition) symptoms
Schizophrenia
DSM criteria for Schiz
Diagnostic and Statistical Manual of
Mental Disorders, Fourth Edition, Text Revision (DSMIV-
TR) diagnostic criteria
The presence of at least two of five characteristic positive
or negative symptoms for at least 1 month:
delusions, hallucinations, disorganized speech, grossly disorganized or catatonic behavior, or negative symptoms
In Shiz
only need one of five if the:
delusions are bizarre or a voice or voices
are keeping running commentary on the person’s behavior or two or more voices are conversing
Other criteria for Schiz
b. Deterioration in social, occupational, and interpersonal
relationships
c. Continuous signs of the disturbance for at least 6 months (can include prodromal or residual symptoms like
amotivation)
d. Schizoaffective disorder and mood disorder with psychotic features have been ruled out
e. Not due to effects of substances or general medical
condition
hallmarks of schizophrenia
Psychotic symptoms
In Schiz:
patients experience a confusion of boundaries between
themselves and the world surrounding them, often called
_______
“a loss of ego boundaries
Postive Sz of Schiz
delusions, hallucinations, bizarre behavior
Negative symptoms of Schiz
blunting of affect, autism, ambivalence, social withdrawal, poverty of speech
MC hallucination
auditory hallucinations are the
most common
Firmly held false beliefs that can be bizarre or nonbizarre
(beliefs unique to certain cultural or religious
groups are not synonymous with delusions)
Delusions
Types of Delusions
Somatic, grandiose, paranoid, religious, nihilistic,
sexual, persecutory, delusions of reference, delusions
of thought (insertion, withdrawal, control,
broadcasting)
Belief that a person closely related to him or her has been replaced by a double
Capgras syndrome
Identifies a familiar person in various other people he or she encounters; even if no physical resemblance, he or she maintains they are psychologically identical
Fregoli synrdrome
Belief that penis is getting smaller and will
disappear
Koro
Self-mutilation driven by delusions
Van Gogh syndrome
Belief that thoughts can be implanted into the brain
Thought insertion
Negative symptoms in Schiz:
_________ speech that is empty or with decreased
spontaneity
Alogia:
Negative symptoms in Schiz:
________: sparsity of emotional reactivity
blunting
Negative symptoms in Schiz:
______unable to initiate or complete goals
Avolition
Other common negative symptoms in Schiz:
anhedonia
(unable to experience pleasure), inability to concentrate
or “attend,” inappropriate affect, poor hygiene
Other Sx associated with Schiz
1) Poor insight into illness
2) Abnormalities of eye movements (increased frequency
of blinking and abnormal saccades during test of
smooth pursuits)
3) Decreased stage IV sleep
4) Loss of normal gracefulness of body movements
Other Sx associated with Schiz
5) Up to 25% may have shown schizoid traits before
schizophrenia developed
6) Tend to be less interested in sexual activity
7) Up to 10% of schizophrenics commit suicide within
first 10 years of their illness
8) Up to 20% of schizophrenics drink excessive amounts
of water, which may lead to chronic hyponatremia
and possible water intoxication
9) Alcohol and drug abuse is common, and schizophrenics
smoke cigarettes three times more than the general
population
Subtypes of Schiz
Paranoid (best prognosis), disorganized, catatonic, undifferentiated, residual
Subtype of Schiz
a) Presence of delusions (often persecutory)
b) Frequent auditory hallucinations
c) Onset of illness (late 20s or 30s) later than for
other subtypes
d) More likely to marry and have children
Paranoid (best outcome)
Subtype of Schiz
a) Display disorganized, nonproductive behaviors
and demonstrate disorganized speech patterns
b) Exhibit flat or inappropriate affect; grimacing is
common
c) Can act silly or childlike and burst out laughing for
no reason
d) Delusions and hallucinations are less organized
and fragmentary
e) Earlier onset
Disorganized (formally called hebephrenic)
Subtype of Schiz
i) Motoric immobility (catalepsy, stupor)
ii) Excessive motor activity
iii) Extreme negativism
iv) Stereotypies, mannerisms, grimacing
v) Echolalia, echopraxia
Catatonic (less commonly seen now than in previous
years
_________ these patients do not satisfy criteria
for any other schizophrenia subtype
Undifferentiated:
these patients
no longer have any major psychotic symptoms but
still exhibit evidence of the illness, with negative
symptoms or at least 2 other odd or eccentric behaviors
or perceptual experiences
Residual
Prognosis of Schizophrenia
Chronic, usually early onset, poor long-term outcome,
devastating illness
Phases of Schizophrenia
Prodromal phase, Active phase, Residual phase
Characterize Prodromal phase of Schizophrenia
often prolonged period of social
withdrawal, delayed developmental milestones, awkward
in motor skills, loss of interest in self-care
Good prognostic factors for Schiz
a. Acute onset, short duration, no previous psychiatric
history, no family history of schizophrenia
b) Mood symptoms present, sensorium clouded
c) No obsessive-compulsive disorder, no
assaultiveness
Good prognostic factors for Schiz
d) Premorbid functioning good, high socioeconomic class e) Married, good psychosexual functioning f) Normal findings on neuroimaging
Poor prognostic factors for Schiz
a) Insidious onset, chronic duration, psychiatric history
present, positive family history of
schizophrenia
b) Mood symptoms absent, sensorium clear
c) Obsessive-compulsive disorder is present,
assaultiveness is present
Poor prognostic factors for Schiz
d. Poor premorbid functioning, low socioeconomic class e) Never married, poor psychosexual functioning f) Structural abnormalities present on neuroimaging
Epidemiology of Schiz
a. Prevalence over lifetime is about 1.0% (no differences
worldwide)
b. Average age at onset: men, _______ years (17-27 years); women, _____ years (17-37 years)
c. Male (M):Female (F) equal frequency
21
27
d. M>F in ________
e. F>M in _______
f. Onset before age 10 and after age 45 are uncommon
severity of illness, negative symptoms, suicide risk
mood comorbidity, better prognosis, better
social functioning
Etiology of Schiz
_______ idea has strong support: the
subject may have genetic predisposition to develop
schizophrenia but does not manifest it unless other factors are encountered (e.g., environmental stressors)
“Two-hit” or “multiple-hit”
In Schiz
Most consistent finding is ______
ventricular enlargement,
especially third and lateral ventricles
In Schiz
Selective reduction in size of :
frontal lobe, basal ganglia,
thalamus, and limbic regions, including the hippocampus
and medial temporal lobe
In Schiz
Increased incidence of
1) Cavum septum pellucidum
2) Partial callosal agenesis
Functional neuroimaging of Schiz
a. __________: negative
symptoms and neurocognitive deficits
b. Positron emission tomographic (PET) studies implicate:
Hypofrontality (frontal and prefrontal cortex)
frontal cortex (orbital, dorsolateral, medial), anterior cingulate gyrus, thalamus, several temporal lobe subregions, and cerebellum