Overview of the Motor System

Question 1

Principle of Connectivity:

Answer 1

The properties of different motor areas are achieved based on the inputs that the motor area integrates.

Question 2

Motor cortex is parcellated into regions that integrate information from which other two cortical regions? Name the motor cortical areas that receive inputs after each, and their general function.

Answer 2

Prefrontal (6,7, executive function), Parietal (1-5, sensory-motor transformations)

Question 3

What is the ultimate target of neurons in motor cortex that receive fibers from parietal association areas?

Answer 3

spinal cord

Question 4

What is the effect of stimulating F5 cortex?

Answer 4

Activates proximal and distal (via M1) muscles and yields complex movements.

Question 5

Which motor area is in charge of mediating self-initiated complex movements?

Answer 5

Supplementary Cortex

Question 6

Motor cortex receives inputs from which nuclei of thalamus?

Answer 6

Ventrolateral, Ventroanterior (indirectly ventroposterolateral, ventroposteromedial, via projections from sensory cortex)