Motor Cortex Flashcards

1
Q

what is the main function of the motor cortex

A

planning and executing voluntary movement

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2
Q

what percentage of fibres come from corticospinal tract

A

30

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3
Q

what tract is the origin

A

corticospinal

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4
Q

what is somatotopy

A

is the point-for-point area of the body which is specific region of central nervous system

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5
Q

explain somatotopy

A

an area of the body specific to part of the CNS. it describes the organization of the moor and sensory areas of the brain

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6
Q

who is associated with somatotopy

A

jacksonian

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7
Q

what is the basic evidence of somatotopy

A

mapping of the cortex

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8
Q

what did david ferrier develop

A

anesthesia is allowed for stimulation of animal brains during surgery

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9
Q

what did electrical stimulation of the cortex do

A

evoke movements of contralateral body parts

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10
Q

how many parts of the brain that precisely control movement

A

15

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11
Q

What happens when u remove all 15 pieces of brain responsible for movement

A

no movement can occur

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12
Q

how can you measure brain cell activity

A

EEG and EcoG

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13
Q

what is EEG - Electroencephalography

A

uses electrodes placed on the skull to record brain activity- indirect

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14
Q

what is EcoG - electrocorticography

A

uses eletrodes plcaed on brain tissue to reocrd brain activity - direct

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15
Q

Ecog is is direct t or f

A

true

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16
Q

why is ecog direct

A

it is directly on the brain tissue

17
Q

what is BCI

A

brain computer interface

18
Q

what is bci used for

A

predicting human movement

19
Q

what can the motor cortex cells encode

A

kinematics and kinetics

20
Q

what does neuronal activity increase or decrease from changes in what

A

load - force and movement / kinetics

21
Q

what can you map the cortex with

A

transcranial magnetic stimulation

22
Q

what does TMS show

A

hot spot in which is associated to a part of the body which will move

23
Q

what is the effects of training on a brain

A

enhanced excitability of the motor cortex,