Chap 8

Question 1

Three principles of sensory motor function

Answer 1

1. Hierarchical organization.
2. Motor output is guided by sensory input.
3. Learning charges mechanisms of motor control

Question 2

Principles of organization

Answer 2

Hierarchical structure
Functional segregation
Parallel, descending pathways
Feedback circuits

President (association cortex) gives direction to lower levels

Lower levels (motor, neurons, and muscles) takes care of details in parallel

Question 3

Posterior parietal association cortex

Answer 3

Provides information on where body parts are in relation to the external world

Question 4

Pathways of posterior parietal association cortex

Answer 4

Input pathway: info from the somatosensory cortex, visual cortex, to the posterior parietal association cortex

Output pathway : from the posterior parietal association cortex to areas of secondary motor cortex

Question 5

Aproxia

Answer 5

Inability to perform movements on command

Question 6

Dorsolateral association cortex

Answer 6

Receives projections from posterior parietal cortex and projects to secondary motor cortex

Question 7

Secondary motor cortex

Answer 7

Projects to primary motor cortex and brainstem. Produces complex movements.

Question 8

Mirror neurons

Answer 8

Fire when individual observe someone performing movement

Question 9

Primary motor cortex

Answer 9

Precentral gyrus of the frontal lobe, in preferred direction of movement

Question 10

Cerebellum

Answer 10

Fine tunes movements . Receives info from primary and secondary motor cortex. brainstem motor nuclei descending motor signal.

Question 11

Basil ganglia

Answer 11

Important for executing movements,inhibitionof unwanted movements, integration and coordination of sensory motor structures and movement sequences.