Basal Ganglia Flashcards Preview

Jason's Neuro Block > Basal Ganglia > Flashcards

Flashcards in Basal Ganglia Deck (28):
1

in a complex movement, what else lights up besides primary motor?

supplemental motor area

2

supplemental motor area lights up when? 2:

1. complex movement
2. mental rehearsal of complex movement

3

what is really represented in primary motor cortex?

functional movements
eg. hand to face and hand to chest

4

what are mirror motor neurons?

visually guided motor neurons in lateral premotor cortex

5

mirror neurons are activity or goal related?

activity related

6

inputs to primary motor include?

3D modelling of environment from parietal
premotor areas

7

inputs to premotor areas come from?

prefrontal cortex: value and judge significance

8

visual system provides what info to motor cortex?

dorsal: where: reaching
ventral: what: grasping

9

what is involved in sequence learning?

supplementary and pre-supplementary motor areas

10

3 big functions of basal ganglia?

1. selection of complex patterns of movement
2. evaluating success of action
3. initiating movements

11

basal ganglia is made up of 5 things:

1. caudate nucleus
2. putamen
3. globus pallidus
4. subthalamic nucleus
5. substantia nigra

12

what else does basal ganglia do besides movement? 3 others:

1. limbic
2. occulomotor
3. prefrontal

13

How is the basal ganglia affected in Huntington's?

basal ganglia severely affected/ablated

14

2 ways basal ganglia communicate?

1. direct: initiation
2. indirect: suppression

15

4 big things cerebellum does:

1. coordination/timing
2. maintain tone
3. motor learning
4. plan sequences for complex movements

16

Cerebellar anatomy: how many lobes?

3 main lobes
sup
mid (largest)
inf.

17

cerebellar histology

cortex gray, subcortical white, same neural circuitry design throughout entire cerebellum

18

cerebellar functional organization?

medial to lateral for body somatotopy

19

cerebellar deficits called?

ataxia

20

effects of a cerebellar unilateral lesion are which side?

ipsilateral (double cross over)

21

Cerebellar Anterior Lobe syndrome get what 2 things? from what?

1. ataxic gait
2. loss of interlimb coordination (heel slide)
usually from ethanol toxicity

22

Cerebellar posterior lobe syndrome gets what 3 things?

1. dysmetria (overshoot reach)
2. dysdiadochokinesia
3. speech abnormality

23

Cerebellar flocculonodular lobe syndrome get?

truncal ataxia

24

dysmetria, dysdiadochokinesia, speech abnormality seen with?

Cerebellar posterior lobe syndrome

25

how do you get truncal ataxia?

Cerebellar flocculonodular lobe syndrome

26

how do you get ataxic gait, loss of interlimb coordination?

Cerebellar Anterior Lobe syndrome

27

if you have right side deficits that are of cerebellar origins, where in cerebellum is lesion?

right side ipsilateral

28

cerebellum demonstrates what with dart throwing and prism glasses? what happens with unilateral lesion?

1. plasticity
2. unable to adjust with prism glasses