2000 Volume 12 Issue 1 Pages 39-42
The purpose of this study was to clarify the basic characteristics of two movement related potentials, the BP (Bereitschaftspotentia1) and the NS’ (negative slope). Differences in the muscle power output level of the major acting muscle and wave-changes of BP and NS’ depending on the starting procedure of movement were investigated. Ten healthy men were used as the subjects and comparison of MRCPs from C3 and CZ were made under the following conditions: 1) Comparison of MRCP in right flexor pollicis longus between the MVC (maximal voluntary contraction) conditions of 20 and 60%; 2) Comparison of MRCP between initiating conditions in which the task exercise was started by a sign or self-initiated. Neither amplitudes nor latencies of BP and NS’ were significantly different between the conditions of MVC, 20 and 60%. The amplitudes of BP and NS’ from C3 and CZ were larger in the signal-related condition than the self-initiated one. These results suggest that the wave forms of MRCP might significantly change depending on the start conditions of movement, but not on the magnitude of MVC in the major acting muscle.
