CLASSIFICATION Flashcards
What are the two major contemporary classificatory systems in psychiatry?
Who produces the DSM system and who commissioned ICD-10?
What does the “operationalized approach” mean in DSM-III?
A: ICD-10 (1992) and DSM-IV (1994
DSM is produced by the American Psychiatric Association; ICD-10 was commissioned by the World Health Organization (WHO).
It uses precise clinical descriptions, inclusion/exclusion criteria, and symptom duration/intensity to diagnose disorders.
What is the difference between characteristic and discriminating symptoms?
What does the “atheoretical approach” in diagnostic classification refer to?
Characteristic symptoms are common across disorders, while discriminating symptoms are unique to a specific diagnosis.
Disorders are described based on observed phenomena, not on theoretical causes like behaviorism or psychoanalysis.
What is the difference between categorical and dimensional approaches in psychiatric diagnosis?
pros and cons of categorical?
Categorical systems classify disorders as either present or absent, while dimensional systems measure disorders on a continuum.
A: Pros: Easy to understand, communicate, and base treatment on.
Cons: Poor validity, vague categories like “psychosis-not specified.”
Dementia in Alzheimer’s disease (diagnostic criteria
5 As
Global deterioration in intellectual capacity and disturbance in higher cortical functions
Insidious onset with slow deterioration
5 As Remember
x Amnesia- Impaired ability to learn new information and to recall previously learned
information
x Aphasia -Problems with language (receptive and expressive)
x Agnosia -Failure of recognition, especially people
x Apraxia-Inability to carry out purposeful movements, even though, there is no sensory or
motor impairment
x Associated disturbance-behavioural changes, delusions, hallucinations
Vascular dementia
Cognitive decline after a cerebrovascular event, stepwise progression, focal neurological signs (e.g., hemiparesis), and emotional/personality change
What characterizes Dementia with Lewy Bodies?
Parkinsonism, fluctuating cognition, visual hallucinations, and progressive cognitive decline
If the Parkinsonian symptoms existed for more than 12
months before dementia develops then = diagnosis of Parkinson’s disease dementia.
If both motor symptoms and cognitive symptoms develop within 12 months, then = diagnosis of Lewy body dementia.
What are the main signs of Frontotemporal Dementia
Insidious onset, disinhibition, emotional blunting, speech disorders, and physical signs like rigidity and incontinence.
What are common causes of
-organic catatonia
- post-infective depression
- Encephalitis and CO poisoning cause catatonia
-influenza can cause post-infective depression.
International Pilot Study of Schizophrenia survey determined the commonest symptoms which are?
- Used 306 acute schizophrenia patients in 9 countries
Lack of insight – 97%
Auditory hallucinations - 74%
Ideas of reference – 70%
Diagnosis criteria for schizophrenia
St Louis or Feigner / Washington university
National institute of mental health research
ICD 10 = largely based off Schneiders
St Louis - 6 months + at least one delusion or hallucination or communication hard due to lack of organisation and 3 of the following present (single, poor premorbid social adjustment, fhx. absennce alcohol oro drug abuse, onset under 40)
National institute
Symptom - first rank symptoms
Duration - 2 weeks
Exclusion - meet full criteria for manic or depressive syndrome
ICD - 1 month + = schizophrenia or acute psychotic episode up to 3 months
Subtypes of schizophrenia
paranoid
hebephrenic / disorganised
Catatonic
paranoid- delusions and auditory hallucinations. Less common to have disorganised speech
Hebephrenic- disorganised speech more commoon, inappropriate affect. impaired social functioning. less common catatonic behaviour.
Catatonic- more common in developing nations and acute onset. Stupor, echolalaia or ecopraxia, posturing, extreme negativism.
Subtypes of schizophrenia
Residual
Simple
undifferentiated
Chronic
Residual- evidence full blown in past, negative syx currently or less severe forms of genetic syx
Simple -ve only, no positive. emotional blunting.
Undifferentiated = generic sux nut not falling in other categories
Chronic- persistent disability 2+ years
Schizotypal disorder
Patients with eccentric manners, social withdrawal, magical thinking, suspiciousness, and obsessive ruminations but without resistance.
The ruminations may have dysmorphophobic contents too.
At least a 2-year history with schizophrenia being never diagnosed
Persistent delusional disorders
Characterised by a persistent, often life-long, typically ‘non-bizarre’ delusion or a set of related delusions arising insidiously in mid-life or later.
Transient auditory hallucinations may occur, but NEVER ANY OF
clear and persistent voices, schizophrenic symptoms such as delusions of control and marked blunting of affect, and definite evidence of brain
disease
syx1 month dsm, icd 3 months
subtype delusional disorder
What is Erotomania (de Clerambault syndrome)?
What characterizes Jealousy (Othello syndrome) and Grandiosity?
A delusion where a person believes someone of higher status is secretly in love with them. Often seen in women, but more common in males in forensic cases; may lead to stalking or assault
Jealousy: Fixed belief of partner’s infidelity, leading to possessive behaviors and violence.
Grandiosity: Belief in having special abilities or relationships, often linked to social or religious involvement.
What are the common types of delusional disorders?
Induced delusion?
- Persecutory: Belief others want to harm them.
- Somatic: Beliefs about bodily issues (e.g., infestations, deformities).
Mixed/Unspecified: Includes various delusional misidentification syndromes
Folie a deux- common in couples. usually 1 person genuine delusion, one induced
why is Schizoaffective disorder is placed with F20 (psychoses) not F30 (affective disorders).
2 subtypes
schizoaffective manic
schizoaffective depressiive -
both schizophrenic and mood symptoms are seen simultaneously in approximately equal proportion
- manic- florid, fast recovery, fhx affective disorders
- depressive- more chronic, fhx schizophrenia
Bouffée Délirante
Sudden onset psychosis with polymorphous delusions, hallucinations, clouded consciousness, and emotional instability.
No organic cause, rapid recovery, and potential for relapses separated by symptom-free intervals.
Process Schizophrenia:
Described by Langfeldt,
poor prognosis and continuous, deteriorating symptoms. I
Cycloid Psychosis:
Sudden onset psychosis with mixed affective and schizophrenic symptoms, including mood swings, confusion, delusions, and motility disturbances.
seen in severe postpartum psychiatric disorders, with high recurrence risk
difference in dsm and icd classification of depressive disorder
DSM-IV: Requires 5 or more symptoms, with at least one being depressed mood or loss of interest. duration - at least two weeks, with a specific list of symptoms, including weight changes, insomnia, and suicidal thoughts.
ICD-10: Focuses on core symptoms like depressed mood, loss of interest, and reduced energy (Criterion A).
-uses a broader description of associated symptoms
- does not specify the number of syxs, but includes ideas of guilt, self-harm, and disturbed sleep
severity grading depression ICD 10
The 4-6-8 rule for severity grading in ICD-10:
For mild depressive episode at least 2 criterion A ‘core symptoms’ with four symptoms in total is required.
For moderate depression, at least 2
criterion A with six symptoms in total is required.
To diagnose a severe episode, at least 2 criterion A symptoms with eight symptoms in total is required.
ICD vs DSM bipolar
ICD 10 needs at least 2 mood episodes before a
bipolar diagnosis can be considered, with complete recovery in between the episodes.
The depressive episode must be present at least for 2 weeks; mania for 7 days (fewer if hospitalised);
hypomania for 4 days and mixed episodes for 2 weeks before they can be diagnosed using ICD
10.
In DSM, bipolar disorder can be diagnosed even with a single manic episode.
BPAD type 1 vs type 2
BPAD is divided into two main broad types;
* Type 1 is characterised by full-blown mania or mixed mania and depression.
* Type 2 is characterised by recurrent depression and hypomania
without episodes of either mania or mixed states.