PSYC 427 Lecture Notes - Lecture 10: Betz Cell, Cartesian Coordinate System, Euclidean Vector
Document Summary
Evarts individual neurons in m1 related to direction of force application, not movement. Recorded from identified ptn (=output cells, layer v neurons in primary motor cortex, betz cells, corticospinal neurons, cm cells) evarts single joint movements 1 degree of freedome. Georgopoulis his focus is on the direction of hand movement in cartesian space. Showed that population of cells code direction of hand movement. Cell is coding direction of movement cells in primary motor cortex encode direction of movement: the neuronal population vector predicts the direction of reaching during an. Instructed delay period : monkey sees a cue signal- indicates direction of movement (tells monkey where to move), then at a variable amount there"s a go signal animal has to instructed direction. Quite abruptly, see formation of population vector that points in direction of upcoming movement. See a single neuron unloaded condition on left, loaded on right.
