MOVEMENT-ASSOCIATED CORTICAL POTENTIAL PRECEDING VOLUNTARY MOVEMENT / 体力科学

ABSTRACT

The purpose of the present experiment is to identify, in detail, results of the preceding experiment of authors that the amplitude of N<SUB>1</SUB> potential was dominant over motor cortex area contralateral to moving limb, with bipolar lead and is to investigate negative potential appearing the scalp preceding voluntary movement depends on a precaution stimulus or on readiness of movement execution only.<BR>In addition to, discussing' the difference of CNV (Contingent Negative Variation) and N<SUB>1</SUB> potential is, also, the purpose of the present experiment.<BR>The present experiment gave the following results.<BR>1. The results obtained with monopolar lead were that the amplitude of N<SUB>1</SUB> potential was maximal at lead placement Cz in all movement.<BR>2. The results obtained with bipolar lead were that the amplitude of N<SUB>1</SUB> potential showed, relatively, lower tendency in the combination within central area and showed, relatively, higher tendency in the combination of other lead placement to central area.<BR>3. Judging from all the scalp, the amplitude of N<SUB>1</SUB> potential showed high tendency at central area.<BR>4. In particular, clear difference was identified between the latency of CNV and that of N<SUB>1</SUB> potential.<BR>5. As showing much the same amplitude except for lead placement Cz, CNV extended from central area over the scalp.