Wk 11 Motor Planning And Learning

Question 1

Name 2 parts of the brain where population coding for motor movement/ planning occurs

Answer 1

The primary motor cortex and the superior colliculus (interacts w FEF for saccades)

Question 2

In the superior colliculus, the x axis represents the __________ of saccades whereas the y axis represents ________

Answer 2

X axis: amplitude

Y axis: angle

Question 3

Which areas might I expect to see more neuronal activity before the execution of a movement, which ceases once movement commences?

Answer 3

Premotor cortex and posterior parietal cortex (PPC), which is posterior of the primary somatosensory cortex.

Question 4

PMd is…

PPC is…

They are both involved in….

Answer 4

Dorsal premotor

Posterior parietal

Planning to execute a movement

Question 5

Name the 2 key motor features of the cerebellum

Answer 5

Smooth movement and motor learning

Question 6

Name the key role of the of superior colliculus

Answer 6

Orienting the head and eyes

Question 7

What would be the effect of cerebellum damage?

Answer 7

Disrupts motor learning

Question 8

A subject is unable to correctly judge the centre mass of an object which they want to pick up, suggesting a visuomotor defecit. Where might they have a lesion and what is this condition called?

Answer 8

Posterior parietal cortex (PPC) lesion, optic ataxia

Question 9

A subject presents with uncoordinated, disorganised movement, similar to the way a drunk person moves. What kind of ataxia might they have, and where in the cerebellum is the lesion likely to be?

Answer 9

Truncal ataxia, Medial cerebellar vermis

Question 10

The LIP (lateral intraparietal cortex) is involved with which two aspects of saccades?

Answer 10

Saccade planning- direction and movement magnitude