Clapp, Wesley C., Muthukumaraswamy, Suresh Daniel  ORCID: https://orcid.org/0000-0001-7042-3920, Hamm, Jeff P., Teyler, Tim J. and Kirk, Ian J.
2006.
Long-term enhanced desynchronization of the alpha rhythm following tetanic stimulation of human visual cortex.
Neuroscience Letters
398
(3)
, pp. 220-223.
10.1016/j.neulet.2005.12.081
|
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: | 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 |
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