SPATIAL TEMPORAL CHARACTERISTICS OF A MOTOR PATTERN FOR REACHING/

1. Temporal patterns of electromyographic (EMG) activity were related to the direction of fast reaching movements. Reaches were to 20 target s in the sagittal plane of the human arm. 2. The subtraction of EMG le vels recorded during very slow movements to each target allowed this s tudy to focus on the phasic aspects of complex EMGs. 3. General featur es of the phasic spatial/temporal patterns differed across muscles, ev en across muscles at the same joint. This indicates that future models of cortical to motoneuronal processing must include nonuniform space- time transformations.