Journal article
Hallucinations following occipital lobe damage: The pathological activation of visual representations
Journal of clinical and experimental neuropsychology, Vol.16(5), pp.651-663
10/01/1994
DOI: 10.1080/01688639408402678
PMID: 7836488
Abstract
Neuropsychological investigation of hallucinations may provide insight into the nature of these subjective phenomena, as well as inform theories of perception and recall. We studied a man who described continuous visual hallucinations of object fragments (e.g., lines, corners, patterns) in the left visual field following a stroke in the right occipital cortex. The subject performed normally on standardized measures of visual perception and other cognitive abilities. He had no personality disturbance, and EEG during hallucinations was normal. Review of our records of 211 cases with focal lesions involving visual cortex revealed 5 patients with similar complaints. The hallucinatory experience of such patients probably reflects pathological activation of neural ensembles in the regions bordering an occipital lesion. These regions are presumed to contain records of visual feature fragments which are co-activated by feedback projections in the earliest visual association cortices, where they produce meaningful patterns during normal recall.
Details
- Title: Subtitle
- Hallucinations following occipital lobe damage: The pathological activation of visual representations
- Creators
- Steven W Anderson - Department of Neurology, Division of Behavioral Neurology & Cognitive Neuroscience , The University of Iowa College of MedicineMatthew Rizzo - Department of Neurology, Division of Behavioral Neurology & Cognitive Neuroscience , The University of Iowa College of Medicine
- Resource Type
- Journal article
- Publication Details
- Journal of clinical and experimental neuropsychology, Vol.16(5), pp.651-663
- DOI
- 10.1080/01688639408402678
- PMID
- 7836488
- NLM abbreviation
- J Clin Exp Neuropsychol
- ISSN
- 1380-3395
- eISSN
- 1744-411X
- Publisher
- Taylor & Francis Group
- Language
- English
- Date published
- 10/01/1994
- Academic Unit
- Neurology
- Record Identifier
- 9984020857002771
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