scholarly journals Charles Bonnet Syndrome: Cortical Hyperexcitability and Visual Hallucination

2018 ◽  
Vol 28 (21) ◽  
pp. R1253-R1254 ◽  
Author(s):  
Max Coltheart
2011 ◽  
Vol 34 (1) ◽  
pp. 24-27 ◽  
Author(s):  
Tsuyoshi Miyaoka ◽  
Motohide Furuya ◽  
Liaury Kristian ◽  
Rei Wake ◽  
Kazunori Kawakami ◽  
...  

1997 ◽  
Vol 31 (5) ◽  
pp. 769-771 ◽  
Author(s):  
Samson Yat-Yuk Fong ◽  
Yun-Kwok Wing

Objective: To describe a middle-aged patient with Charles Bonnet syndrome (CBS) suffering from concurrent major depression. Clinical picture: A 41-year-old Chinese man with retinitis pigmentosa developed complex and vivid visual hallucinations. This was followed by the onset of major depressive illness. His visual hallucinations were greatly influenced by his cultural background and changed during the course of his depression. Treatment: The patient was treated with imipramine. Outcome: The patient had a relapse of depression due to his non-compliance. He recovered after the resumption of imipramine but the visual hallucinations persisted. Conclusions: Patients suffering from CBS can have another concurrent psychiatric illness. The content and form of this patient's visual hallucinations were modified by his cultural background and depressive illness. Sensory deprivation is suggested to be the pathogenic mechanism of his visual hallucination.


2004 ◽  
Vol 101 (5) ◽  
pp. 846-853 ◽  
Author(s):  
Thomas M. Freiman ◽  
Rainer Surges ◽  
Vassilios I. Vougioukas ◽  
Ulrich Hubbe ◽  
Jochen Talazko ◽  
...  

✓ The development of visual hallucinations after loss of vision is known as the Charles Bonnet syndrome. This phenomenon was first described in 1760 by Charles Bonnet and others during their observations of elderly patients with degeneration of the retina or cornea. To date a clear association between visual hallucinations and neurosurgical procedures has not been reported. Because of their clear demarcation, however, surgical lesions in the cerebrum offer a unique opportunity to determine the pathoanatomical aspects of visual hallucinations. During a 3-year period, 41 consecutive patients who acquired visual field defects after neurosurgery were examined for the occurrence of visual hallucination. Postoperatively, four of these patients experienced visual hallucinations. In two of them an upper quadrantanopia developed after the patients had undergone selective amygdalohippocampectomy. In the other two patients a complete hemianopia developed, in one case after resection of a parietal astrocytoma and in the other after resection of an occipital glioblastoma multiforme. The visual hallucinations were transient and gradually disappeared between 4 days and 6 months postoperatively. The patients were aware of the fact that their hallucinations were fictitious and displayed no psychosis. Electroencephalographic recordings were obtained in only two patients and epileptic discharges were found. Deafferentiation of cortical association areas may lead to the spontaneous generation of complex visual phenomena. In the present series this phenomenon occurred in approximately 10% of patients with postoperative visual field defects. In all four cases the central optic radiation was damaged between the lateral geniculate nucleus and the primary visual cortex. The complex nature of the visual hallucination indicates that they were generated in visual association areas.


2013 ◽  
Vol 04 (01) ◽  
pp. 63-65 ◽  
Author(s):  
Baba Awoye Issa ◽  
Abdullahi Dasliva Yussuf

ABSTRACTCharles Bonnet syndrome occurs in visually impaired but cognitively normal individuals. This report describes a condition of vivid visual hallucination (phantom images) in an 85‑year‑old conscious man, who had been blind by bilateral progressively worsening glaucoma. This common, but rarely reported, condition was managed by behavioral approach of repeated blinking, intermittent eyes closure, and reassurance. While emotional, mood and cognitive disorders need to be ruled out, the condition, though frightening to the afflicted, is benign and remediable with simple, inexpensive approach. Health workers managing people with terminal blindness should always ask for the presence of hallucinations from their patients to forestall a preventable distress resulting from wrong perception without visual stimulus.


2018 ◽  
Vol 30 (2) ◽  
pp. 122-128 ◽  
Author(s):  
Darija Jurisic ◽  
◽  
Irena Sesar ◽  
Ivan Cavar ◽  
Antonio Sesar ◽  
...  

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