The Phenomenology and Neurobiology of Visual Distortions and Hallucinations in Schizophrenia: An Update.

Visual distortions and hallucinations in schizophrenia are linked to disruptions in early visual processing and higher-order perceptual integration. The authors review evidence that these phenomena involve altered activity in primary visual cortex and impaired connectivity with frontoparietal attention networks. Specific visual distortions, such as changes in color, contrast, and motion perception, often precede hallucinations. Neurobiological findings suggest that dopaminergic and glutamatergic dysregulation contribute to these perceptual abnormalities. The review highlights the need for further research to clarify the mechanisms underlying visual symptoms and to develop targeted treatments.

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Abstract

The Phenomenology and Neurobiology of Visual Distortions and Hallucinations in Schizophrenia: An Update.