Thought withdrawal
In psychiatry, thought withdrawal is the delusional belief that thoughts have been 'taken out' of the patient's mind, and the patient has no power over this. It is often associated with disturbances in self-experience, self-agency, and identity. Thought withdrawal is classified as Schneider’s first-rank symptom of schizophrenia in 1959, alongside related phenomena like thought insertion and thought broadcasting. These symptoms are typically regarded as signs of psychosis and are central to the diagnosis of schizophrenia spectrum disorders.
Diagnostic classifications
Thought withdrawal is included in major psychiatric diagnostic systems:- DSM-5: explicitly mentioned as an example of a "delusion of control" under the criteria of schizophrenia.
- ICD-11: categorized under 6A20 Schizophrenia as a part of passivity phenomena -- a set of symptoms characterized by the belief that one’s thoughts, emotions, or behaviors are being directed or manipulated by an outside source.
Theoretical and explanatory models
Phenomenological psychiatry
German psychiatrist Karl Jaspers classified the concept of thought withdrawal as “primary delusions” and described it as “non-understandable” – abrupt experiences that cannot be interpreted by ordinary psychological processes. Jasper described thought withdrawal as the loss of intentional mental activity and considered it to involve disruptions in agency, intentionality, and consciousness. Together, he and other phenomenologists linked thought withdrawal to various features:- Hyperreflexivity
- Disrupted intentionality
- Disrupted temporal self-continuity
- Diminished perceptual integration and self-boundaries
Cognitive models
The self-monitoring model proposed by Chris Frith argued that schizophrenia involves failure of the brain’s self-monitoring system. Consequently, individuals misattribute their self-generated thoughts to externally imposed mental contents, leading to thought withdrawal, thought insertion, and delusions of control. Similarly, Bentall’s attributional model suggested that individuals with delusions often present cognitive misattributions of momentary disturbances or lapses in thought flow, attributing it to external agents. This externalization aids in the protection of self-esteem but leads to false beliefs about the cause of one’s own experiences.Neurobiological theories
Kapur’s aberrant salience hypothesis proposes that dysregulated dopamine transmission leads to exaggerated significance being assigned to neutral internal events. When this occurs, delusions like thought withdrawal occur to make sense of “aberrantly salient experiences”.Researchers investigating delusional experiences in antipsychotic-free individuals with schizophrenia conducted a factor analysis on item-level symptom ratings. Findings proposed the link between delusions and brain areas that support self-referential processing and distinctions between internal and external experience. Specifically, hypoperfusion in the anterior cingulate cortex and medial prefrontal cortex contribute to the emergence of symptoms like thought withdrawal.
López-Silva et al.’s 20-year longitudinal study of individuals with schizophrenia and other psychosis investigated the persistence and co-occurrence of thought withdrawal, insertion, and broadcasting. Findings showed that thought withdrawal consistently appeared alongside symptoms such as anxiety, auditory verbal hallucinations, delusions of control, and depersonalization. This reflected broader disruptions in multimodal processing and a broader phenomenon called pseudo-coherent delusional realities.
Clinical presentations and effects
Associated symptoms of thought withdrawal include:- A diminished sense of control over one’s own mental activity
- Gaps in thinking, commonly described as externally extracted
- Feelings of being manipulated and monitored
Associated diagnosis
- A 2020 study by Malinowski et al. discovered that 41% of individuals experiencing first-episode psychosis reported symptoms of thought withdrawal, suggesting that it is a relatively frequent feature in early psychosis.
- A 20-year longitudinal study by López-Silva et al. revealed that thought withdrawal is rarely reported without the presence of AVHs. This finding proposed a continuum model of self-disturbance.