Abstract
The purpose of this study was to investigate the effect of mild
chronic exercise on visual evoked potentials (VEPs). Twenty male Wistar rats
were randomly divided into two groups: Control (C) and Exercise (E) groups.
Exercise was performed on a motor-driven treadmill for 8 weeks. After
5 min of exercise, plasma lactic acid levels were determined. At the end
of the experimental period, VEPs were recorded from E group twice: Five min
(E-5 min) and 24 h (E-24 h) after the last bout of
exercise. During visual evoked potential (VEP) recordings body temperature of
the animals was kept constant to eliminate the effect of temperature changes.
No difference was found between the lactic acid levels of two groups. The mean
latencies of VEPs from E-5 min were shortened compared with the control
group. The mean latencies of VEP components in E-24 h were observed to
have returned to the control levels. Peak to peak amplitudes of VEPs were found
to be unaltered among all measurements. We concluded that immediately after
exercise, VEPs latencies were shortened independently from body temperature via
unknown mechanisms. The latencies of VEPs were returned to control values after
24 h.
Key words
Lactic acid - rat - chronic exercise - aerobic exercise - evoked potentials
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Y. G. Ozkaya
Faculty of Medicine Department of Physiology · Akdeniz
University
Arapsuyu · Turkey ·
Phone: +90-242-2274483
Fax: +90-242-2274495
Email: gulozk@yahoo.com
