Lecture 25 Flashcards
where is the primary MC in relation to the central sulcus
anterior
where is the primary somatosensory cortex in relation to the central sulcus
posterior
what area is the primary motor cortex
4
what area is the premotor cortex and supplementary motor cortex
6
what areas is the primary somatosensory cortex
3a, 3b, 1, 2
what is the area of the secondary somatosensory cortex
40,43
what is the area of the posterior parietal cortex
5,7
what is the main role of the M1 (primary motor cortex)
involved in the execution of voluntary movement
what does M1 control
individual movements which require multiple muscle group activity
what do the cell bodies within the M1 code for
force, speed and direction of a movement
when do the cell bodies within M1 fire
directly before the onset of muscle movement
where do the cell bodies within M1 synapse onto
directly within aMN and interneurons of individual muscles and groups around a joint
how do M1 neurons encode for movement direction as a population
M1 neurons require the whole population of cortical cells as each cell represents different preferred movement directions. Thus, the firing response of populations of M1 neurons accurately represents movement direction
M1 neuron firing rate ______ proportionally with _______ output
increases, increase in force
M1 correlates with ____ and ____ but not ______
force direction, amplitude, displacement of the body part
