Activity of a pyramidal tract projecting neuron (PTN) of the motor cortex during walking on the flat surface and horizontal ladders with crosspieces 18, 12 and 5 cm wide. Latent period of response to stimulation of the pyramidal tract was 0.9 ms; collision test was satisfied. The cell was activated by flexion of the contralateral shoulder, that is, elbow forward movement. This cell was recorded in track 22 of Cat 7 (see cortical map).
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