Cortex

Question 1

What is the outcome of lesions in area 6 (part of frontal lobe in front of area 4) and area 4 (primary motor cortex)?

Answer 1

Lesions in area 4 impair ability to generate simple movements.
Lesions in area 6 impair ability to generate complex movements about several joints.

Question 2

What are the two divisions of area 6?

Answer 2

PMA (premotor areas)- sensory guided movements

SMA (supplementary motor area)- memory guided movements

Question 3

How much of the CNS’s neurons does the cerebellum contain?

Answer 3

About 50%

Question 4

What is the vestibulocerebellum?

Answer 4

Receives inputs from the vestibular system and so is important for balance, posture and gait.

Question 5

What is the spinocerelellum?

Answer 5

Receives information from the spinal cord. Involved in identifying the position of limbs and control of ongoing limb movements.

Question 6

What is the cerebrocerebellum?

Answer 6

Receives information from the cerebral cortex (motor and sensory information). Important for planning, modifying and learning movements (muscle memory).

Question 7

Does the cerebrocerebellum control the ipsilateral or contralateral side of the body?

Answer 7

The ipsilateral side and is connected to the contralateral cerebral hemisphere.