5 - Motor System

Question 1

posterior cortex

Answer 1

• source of sensory info
• specifies movement goals & sends sensory information from vision, touch, & hearing to frontal regions

Question 2

prefrontal cortex

Answer 2

• planning of movement
• receives instructions from the posterior cortex & then generates plans for movements & passes it to the premotor & primary motor cortices

Question 3

premotor cortex

Answer 3

• movement sequencing
• houses a movement repertoire & recognizes others’ movements and selects either similar or different actions

Question 4

primary motor cortex

Answer 4

• generation of specific movements
• more elementary movements than premotor cortex, like hand & mouth movements

Question 5

basal ganglia

Answer 5

• a collection of sub-cortical nuclei in the forebrain
• important for controlling & coordinating movement
• can modulate movement force
• lesions to the basal ganglia can lead to Dyskinesias, Huntington’s Disease, Tourette’s Syndrome, & Parkinson’s Disease

Question 6

cerebellum

Answer 6

participates in acquiring & maintaining motor skills