We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Correspondence |

Charles Bonnet Syndrome After Occipital Cortical Resection for Cortical Dysplasia May Be Related to Denervation Supersensitivity

Colin S. H. Tan, MBBS, MMed (Ophth), MRCSEd; Bernhard A. Sabel, PhD
Arch Neurol. 2005;62(9):1479. doi:10.1001/archneur.62.9.1479-a.
Text Size: A A A
Published online


We read with interest the article by Choi et al1 describing Charles Bonnet syndrome (CBS), which occurred after broad, right-sided occipital cortical resection for cortical dysplasia. These hallucinations were not associated with electrographic seizures.

Although CBS is more common with decreased visual acuity, it also occurs in patients with visual field defects and normal central acuity.2,3 Freiman et al3 described hallucinations occurring within visual field defects that developed after neurosurgery. Moreover, in a series of patients with cortical dysplasia, 3 (14%) of 22 patients developed visual field defects following surgical resection of abnormal brain tissue.4 Therefore, it would be interesting to know if the patient described by Choi et al experienced a decrease in visual acuity or developed a new (or enlargement of an existing) visual field defect following cortical resection. Either of these factors may possibly explain the development of CBS. The occurrence of hallucinations within the left visual field, which is represented in the right occipital cortex which was resected, further suggests that the hallucinations may be occurring within a visual field defect caused by resection of that area.

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

First Page Preview

View Large
First page PDF preview





Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.

See Also...
Articles Related By Topic
Related Collections
PubMed Articles