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Positive Symptoms Schizophrenia: Hallucinations and Delusions

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Schizophrenia is a complex psychiatric disorder characterized by a range of symptoms that significantly impact cognition, behavior, and emotional regulation. Among these, the positive symptoms stand out as they involve the addition or exaggeration of normal mental functions, deviating markedly from typical behavior and perception. Hallucinations and delusions are prominent positive symptoms, each profoundly affecting the individual's experience of reality.
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Updated: Mar 27, 2026

A Multimodal Imaging- and Stimulation-based Method of Evaluating Connectivity-related Brain Excitability in Patients with Epilepsy

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Distinguishing Neuroimaging Features in Patients Presenting with Visual Hallucinations.

T T Winton-Brown¹, A Ting², R Mocellin¹

¹From the Departments of Neuropsychiatry (T.T.W.-B., R.M., D.V.).

AJNR. American Journal of Neuroradiology

|January 9, 2016

Summary

This summary is machine-generated.

Visual hallucinations can indicate underlying brain disease, prompting brain imaging. Understanding hallucination characteristics aids radiologists in diagnosing the cause, whether focal lesions or global conditions.

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Area of Science:

Neurology
Radiology
Psychiatry

Background:

Visual hallucinations are uncommon and often signal underlying organic brain disease.
Patients presenting with visual hallucinations are frequently referred for brain imaging.
A systematic approach is needed to interpret imaging in these complex cases.

Purpose of the Study:

To provide radiologists with a pragmatic approach for interpreting brain imaging in patients with visual hallucinations.
To highlight the importance of hallucination characteristics in guiding the diagnostic process.
To offer a framework for identifying potential causes of visual hallucinations.

Main Methods:

Review of the nature and formation mechanisms of visual hallucinations.
Analysis of hallucination features as diagnostic clues.
Development of a framework for differential diagnosis based on imaging findings.
Categorization of causes into focal lesions and global conditions.

Main Results:

Familiarity with hallucination characteristics can significantly aid in interpreting brain imaging.
A structured approach, considering both visual pathway lesions and global brain conditions, is effective.
Identifying specific features of hallucinations can help narrow down the potential underlying pathologies.

Conclusions:

Radiologists can effectively interpret brain imaging for visual hallucinations by understanding hallucination phenomenology.
A systematic diagnostic framework improves the identification of underlying organic brain disease.
Integrating clinical features of hallucinations with imaging findings is crucial for accurate diagnosis.