Basal Ganglia and Cerebellum Flashcards Preview

Hugh's MD1 Neuro > Basal Ganglia and Cerebellum > Flashcards

Flashcards in Basal Ganglia and Cerebellum Deck (19):
1

Which part of the basal ganglia is effected in Parkinson's?

Substantia nigra

1

Which sides are deficits in relation to cerebellar lesions?

Ipsilateral

2

How is grey and white matter organised in the cerebellum?

Grey matter cortex

Sub-cortical white matter

Sub-cortical grey matter

3

When does the supplementary motor area become involved in movement?

When carrying out more complex movement

3

Where are mirror neurons located?

The ventral-anterior aspect of the lateral premotor cortex

4

What is the function of the cerebellum?

Coordinating the time and sequencing of muscle actions and movements

Maintenance of muscle tone

Motor learning

Planning sequences of muscle activation for complex movements

 

5

What is the function of the motor cortex?

Initiation of movement

Skilled movement

Dextrous movement

Integration of movement with postural stability

6

What is the likely location of a lesion that would cause an ataxic gait?

Anterior lobe of the cerebellum

9

What is the function of the basal ganglia?

Allows the selection of complex patterns of voluntary movement eg riding a bike - non-conscious routine of movement

Evaluates the success of actions in achieveing the goal of that action

Initiation of movement

10

Describe the structure of the cerebellum

3 lobes

Tightly folded

Cerebellar peduncles

11

Which part of the basal ganglia is affected in Huntington's disease?

Caudate nucleus

12

What are the names of the component parts of the basal ganglia

Caudate nucleus

Putamen

Globus pallidus - internal and external segments

Subthalamic nucleus

Substantia nigra

12

Where is the basal ganglia located?

The majority is in the forebrain except the substantia nigra that is in the brainstem

13

What did the grip test with monkey show?

The same muscles can be controlled by different UMNs depending on the function being performed

14

How does the basal ganglia and the motor cortex interact?

The motor cortex uses the basal ganglia to communicate with itself

15

Where is the motor cortex?

Prefrontal gyrus

 

16

T/F The basal ganglia is a collection of nuclei

True

18

What is dysmetria characterised by?

Lack of coordination of movement - typically an overshoot or undershoot of limb positioning

19

In what order is the body laid out on the homunculus from medial to lateral?

Lower limb > Trunk > Upper Limb > Face