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Flashcards in 23-Motor3 Deck (12)
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1

[True/false]: SMA, lateral premotor, and parietal areas account for ~50% of connections to spinal motor neurons

true

2

Lesions in hand area of primary motor cortex produce

impaired digit control

3

Lesions in hand area of premotor cortex produce

impaired reaching

4

[True/false]: direction, velocity, acceleration, and position can be encoded simultaneously

true

5

Overall order of importance of different movement encodings

1. Direction
2. Velocity
3. Position
4. Acceleration
(but varies for different cells)

6

General properties of frontal premotor function (x6)

- process final stages of visuomotor transformations
- activated during movement preparation
- may specialize in different motor behaviours (e.g. PMd for reaching, PMv for grasping)
- spatial ospects of behaviour strongly represented
- simultaneously prepare for multiple actions
- related to movement of either limb

7

PMd

dorsal premotor cortex

8

PMd is involved in (x2)

- simultaneous preparation for multiple potential actions
- integrates motor and visual information during *reaching*

9

PMv

ventral premotor cortex

10

PMv is involved in (x3)

- specialized for reaching movement (?? Supposed to be grasping ??)
- inputs from VIP
- tactile and visual responses aligned to body part

11

Mirror neuron system located in ___

lateral/rostral portion of PMv (F5)

12

Areas involved in motor sequences (x2)

SMA and preSMA