Clapp, Wesley C., Muthukumaraswamy, Suresh Daniel ![]() |
Abstract
It had been shown previously that a photic tetanus induces LTP-like changes in the visual cortex, as indexed by an enhancement of the N1b component of the visual evoked potential, recorded non-invasively by electroencephalography. This potentiation was shown to last over 1 h. In the present study, the effect of a photic tetanus on oscillatory activity is investigated. EEGs were collected from eight healthy subjects in three conditions while visual checkerboards were displayed. Following baseline presentations in two conditions a lateralized visual tetanus was given, either to the left or right visual field, and in a third condition no tetanus was given. This was followed by a return to baseline presentations, both immediately after the tetanus/control block, and 1 h later. Enhanced event-related desynchronization (ERD) of the alpha rhythm lasting 1 h was seen following the photic tetanus over occipital electrodes. Because ERD of the alpha rhythm is thought to represent active cortex, these results suggest that the visual tetanus induces long-lasting cortical changes, with stronger neuronal assemblies and increased neuronal output.
Item Type: | Article |
---|---|
Date Type: | Publication |
Status: | Published |
Schools: | Psychology |
Subjects: | B Philosophy. Psychology. Religion > BF Psychology R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry |
Uncontrolled Keywords: | Alpha rhythm; Long-term potentiation; Event-related desynchronization; Tetanus; Visual system; Human |
Publisher: | Elsevier |
ISSN: | 0304-3940 |
Last Modified: | 20 Oct 2022 09:50 |
URI: | https://orca.cardiff.ac.uk/id/eprint/33283 |
Citation Data
Cited 25 times in Scopus. View in Scopus. Powered By Scopus® Data
Actions (repository staff only)
![]() |
Edit Item |