RELATIONSHIP BETWEEN REACTION TIME AND AMPLITUDE CHANGES OF THE H-REFLEX IN THE PERFORMANCE OF SIMPLE MOTOR TASK IN PATIENTS WITH THYROTOXICOSIS
Journal Title: Journal of IMAB - Annual Proceeding (Scientific Papers) - Year 2013, Vol 19, Issue 1
Abstract
The authors examine the dependence between reaction time as an indicator of change at cerebral level and H-reflex amplitude change being a relative index of excitability level in the spinal cord during the preparation of a simple voluntary movement in thyrotoxicosis patients. Electrophysiological investigations are carried out after identifying the disease and prior to the beginning of causal therapy. Patients are comfortably seated on a chair in a dark room and respond to light signal from a blitz-lamp and it was determined reaction time. Simultaneously with light signal presentation, nervus tibialis in the popliteal fossa of the same leg is excited to evoke H-reflex. One-day signal programme consists of a total of 120 light signals divided into three equal blocks. H-reflex amplitude evoked only once for every light signal is compared with control H-reflex amplitude. Its decrease or increase is read. Reaction times are grouped according to the extern of corresponding H-reflex amplitude increase or decrease. Data obtained serve to construct relation curve between reaction time and H-reflex amplitude changes. This relation curve differs in nature from the curve when healthy subjects under the same experimental conditions are tested.
Authors and Affiliations
Miroslav Marinov, Iglika Marinova, Kosta Mirchev, Borislav Boychev, Christiana Romanova, Nina Radeva, Radko Radev
Keywords
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- EP ID EP125928
- DOI 10.5272/jimab.2013191.379
- Views 128
- Downloads 0
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