Steven:
I'm not certain what you mean by "EEG changes". In completely blind indivisuals alpha activity is decreased, but there is certainly still EEG activity over the occipital lobes. If you do an EEG in somebody who is acutely blind from anterior disease, there are some patients who have a brief period of visual hallucinations that I suspect there would be EEG correlates to that but I can't reference that. after time there usually are not EEG spikes in deafferented occipital lobe recordings.
I think hand motion would be enough to allow normal alpha activity and a normal EEG over the occipital lobes.
Jack
John E. Carter, M.D.
Professor of Neurology & Ophthalmology
The University of Texas Health Science Center at San Antonio
Academic Office 210 450 0500
Clinic 210 450 9400
Original Message:
Sent: 11/4/2025 11:14:00 AM
From: Steven Kane
Subject: EEG
A general group question: would you expect any EEG changes over the posterior regions after deafferentation due to severe anterior visual pathway damage? One eye became NLP and the other HM.
Steven Kane