Psychosis and Schizophrenia Flashcards
Define Psychosis
Mismatch between representation of reality in individual’s mind and representation supported by objective evidence
Classify psychosis
Perception and thought
Define Delusion
Unshakeable belief (fixed form belief), derived by erroneous inference, out of keeping with social or cultural beliefs
Themes of delusion
Persecution, infidelity, erotomania, grandiosity, ill-health, guilt, nihilistic, poverty
Symptoms of psychosis
- Delusions
- Hallucinations
- Formal thought disorder
Define hallucination
Hallucination is a percept without object i.e. a sensory experience without an external stimulus
Types of hallucination
Any sensory modality
- Auditory (hearing)
- Visual (vision)]
- Tactile (Touch)
- Olfactory (smell)
- Gustatory (Taste)
Formal Thought disorder
A pattern of disordered language that reflects disordered thought form
Examples of formal thought disorder
- Loosening of association (derailment)
- Flight of ideas
- Circumstantial thoughts
- Tangential thoughts
- Thought block
Most common form of hallucinations within schizophrenia and psychosis
Auditory hallucinations
What % of the population are estimated to be experiencing hearing voices?
5-28%
List positive symptoms of schizophrenia
- Thought disorder
- Disorganised behaviour
- Delusions
- Hallucinations
List negative symptoms of schizophrenia
- Social withdrawal
- reduced attention
- Blunted affect
- Avolition
- Poverty of speech
Scheider’s First Rank Symptoms
ABCD Auditory Hallucinations Broadcasting of thought Controlled thought (delusions of control) Delusional Perception
(Thought echo, third persona auditory hallucination, delusional perception, made volition, somatic passivity)
Clinical features of Schizophrenia
Reality distortion (Positive) Disorganisation (Positive) Psychomotor poverty (negative)
Characteristic reality distortions of schizophrenia
Third person auditory hallucinations
Alien influence over thought
Organic causes of psychosis
- Delirium
- medication-induced (corticosteroids, stimulants, dopamine agonists)
- Endocrine disorders (Cushing’s, hypothyroidism, hyperthyroidism)
- Neurological disorder (temporal lobe epilepsy, MS, movement disorders, Wilson’s disease, Huntington’s disease)
- Systemic diseases (porphyria, SLE)
Schizophrenic cause of psychosis presentation
- Symptoms present for longer than 28 days
- First rank symptoms present OR persistent hallucinations and delusions
- Negative and cognitive symptoms