Delusional and delusional-like states
Delusional ideas should be distinguished from states that resemble them but have a different nature.
- Induced delusions: an unstable state arising under the influence of another ill person (the inductor). Quickly resolves after isolating the patient.
- Residual delusions: preservation of the patient's unshakable belief in the reality of what they experienced during an acute psychotic state, even after actual hallucinations have disappeared.
States requiring differentiation from true delusions include:
- Delusional-like fantasies: characteristic of individuals with histrionic personality traits. Patients understand they are lying to attract attention. The details of the fabrications constantly change.
- Primitive ideas: found in intellectual disability. They represent an absurd, out-of-context use of other people's thoughts and complex terms without understanding their meaning.
Overvalued and obsessive ideas (obsessions)
Unlike delusions, overvalued ideas do not contain absurdities. A person is fanatically fixated on a certain thought (e.g., jealousy, elaborate diets, inventing), subordinating their life to it and ignoring criticism from others. They are considered a borderline disorder, but can be an early stage of schizophrenia.
Obsessive-compulsive syndrome manifests as intrusive fears (phobias). Unlike neurotic fears, in schizophrenia the theme of the phobia is detached from reality (e.g., fear of swallowing a needle). To mitigate anxiety, patients resort to compulsions (rituals) — absurd protective actions whose absurdity they themselves recognize. Obsessive states are characteristic of neuroses, psychopathies, and certain forms of schizophrenia.
Key delusional syndromes
Thought pathology is prominently manifested in chronic and acute delusional syndromes.
Chronic syndromes progress through developmental stages from paranoid (primary, systematized delusions without hallucinations) to paranoid-hallucinatory (hallucinations and psychic automatism are added) and, finally, paraphrenic (absurd ideas of grandeur against the background of the disintegration of the delusional system).
The most well-known chronic syndrome is Kandinsky-Clérambault syndrome (characteristic of paranoid schizophrenia). Its classic triad:
- Pseudohallucinations.
- Delusions of control.
- Phenomena of psychic automatism (the feeling that thoughts, sensations, or movements are controlled from the outside).
Acute syndromes include acute paranoid (sudden sensory delusions with anxiety and ideas of reference/staging) and specific states of false recognition, such as Capgras syndrome (syndrome of the negative double — the conviction that a close person has been replaced by a made-up double) and Cotard's syndrome (megalomanic nihilistic delusions in which the patient believes they are rotting from within and are the greatest sinner).
Briefly: answers to topical questions
What types of psychic automatism are distinguished in Kandinsky-Clérambault syndrome?
In Kandinsky-Clérambault syndrome, three main types of psychic automatism are distinguished.
- Ideational automatism — manifested by a feeling of insertion or withdrawal of thoughts, a sensation of outside interference in the train of thought, mentism, symptom of openness, "thought echo", and verbal pseudohallucinations.
- Sensory automatism — a state in which various bodily sensations (cynesthesias, warmth, pain, burning) are perceived as specially induced from the outside.
- Motor automatism — the patient's illusion that their natural movements, facial expressions, or speech occur against their will, under external influence.
What types of obsessive states (obsessions) are distinguished in clinical psychiatry?
Clinical psychiatry distinguishes the following types of obsessive states:
- Obsessive thoughts — the appearance of unnecessary thoughts that a person is powerless to get rid of.
- Obsessive counting — an irresistible urge to count everything encountered.
- Obsessive doubts — constant agonizing doubts about the correctness or completion of what has been done.
- Obsessive memories — involuntary appearance of vivid memories of unpleasant events.
- Obsessive fears (phobias) — intrusive fears; in schizophrenia, they can be unusual and detached from reality.
- Rituals (compulsions) — symbolic protective actions that temporarily reduce anxiety and fear.
Obsessive drive is distinguished separately as one of the degrees of severity of pathological urges: the patient can control it, but refusing to fulfill it causes severe distress.
What are the main themes (plots) of delusions characteristic of paranoid syndrome?
Paranoid syndrome is characterized by primary interpretative delusions with a high degree of systematization.
Main themes:
- Persecution;
- Jealousy;
- Inventing/Invention;
- Hypochondria;
- Litigiousness;
- Material damage.
How do pseudohallucinations differ from true hallucinations?
Pseudohallucinations differ from true hallucinations in localization, perception characteristics, and the patient's attitude toward the images.
| Sign | True hallucinations | Pseudohallucinations |
|---|---|---|
| Properties of the image | Endowed with the properties of real objects (corporeality, volume) | Devoid of sensory vividness, incorporeal, transparent |
| Localization | Projected into external, real space | Projected into internal, imaginary space ("inside" the head) |
| Sense of being made/forced | Absent (perceived naturally) | Present (impression of artificiality, external broadcast) |
| Attitude of others | The patient is sure that others perceive the same thing | Conviction that the images are transmitted personally to the patient |
| Patient's behavior | Treats the images as real objects | Does not try to run away, sometimes tries to «shield» the body |
Class and exam questions
What is the main difference between overvalued ideas and delusions?
Overvalued ideas do not contradict objective reality and contain no absurdities; the patient simply attaches excessive, fanatical significance to a real thought.
What is psychic automatism?
This is the patient's subjective feeling that their thoughts, feelings, or movements occur against their will, under the influence of external forces (e.g., hypnosis or equipment).
How do acute delusions differ from chronic ones?
Acute delusions are emotionally charged, unsystematized, and prone to spontaneous remission. Chronic delusions are systematized (at least initially), emotionally monotonous, and treatment-resistant.
What else to study on this topic
- Types of psychic automatism (ideational, sensory, motor)
- Dysmorphomanic syndrome and anorexia nervosa
- Symptoms of false recognition (Fregoli syndrome, intermetamorphosis)
- Dynamics of the development of chronic delusions according to V. Magnan
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