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Flashcards in Brain Control of Movement Deck (23)
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1

What do lateral pathways control?

Voluntary movements of distal movements

2

What do ventromedial pathways control?

Posture
Locomotion

3

What is the main tract involved in the lateral pathways?

Corticospinal tract

4

What areas of the brain does the CST originate from?

Areas 4 and 6 of frontal motor cortex (rest is somatosensory)

5

Where does the CST decussate?

Medulla/spinal cord junction

6

Where do CST axons synapse?

Ventral horn motor neurones and interneurones

7

Where does the rubrospinal tract start?

Red nucleus of midbrain

8

What is the result of lesions involving the CST and RST?

Loss of fine movements of arms and hands

9

What is the result of lesions involving the CST?

Loss of fine movements, functions reappear after a few months

10

What is the function of the vestibulospinal tract?

Stabilizes head and neck

11

What is the function of the tectospinal tract?

Ensures eyes remain stable as body moves

12

What are the 2 ventromedial pathways that control posture and locomotion?

Vestibulospinal tract
Tectospinal tract

13

What are the ventromedial pathways that control trunk and antigravity muscles?

Pontine and medullary reticulospinal tracts

14

Where do the pontine and medullary reticulospinal tracts originate?

Brainstem

15

What is the function of the PRT and MRT?

Maintain balance and body position

16

Where is the primary motor cortex located?

Precentral gyrus

17

What are the somatotopically organised motor maps found in area 6?

Premotor area (PMA)
Supplementary motor area (SMA)

18

What is the function of the SMA?

Innervates distal motor units directly

19

What is the function of the PMA?

Connects reticulospinal neurones innervating proximal motor units

20

What creates a mental image of body?

Somatosensory, proprioceptive, and visual inputs to posterior parietal cortex

21

Where are decisions made about what actions/movements to take?

Prefrontal and parietal cortex

22

Where do axons from the prefrontal and parietal cortex converge?

Area 6

23

What happens at the area where the prefrontal and parietal cortex converge?

Signals encoding what actions are desired are converted into how the action will be carried out.