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CNS physiology > Lecture 3 > Flashcards

Lecture 3 Flashcards

1
Q

Each alpha motorneuron ( amn ) innervates several ……..

A

Muscle

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2
Q

Each muscle innervated by one ……

A

amn

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3
Q

Force of contraction depend on

A

Numbers of motor unit , frequency of action potential

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4
Q

Ia afferent is activated by

A

Rapid change in the length of the muscle

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5
Q

Golgi tendon organ is sensitive to ………

A

Muscle tension

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6
Q

What are the two neurones involved in stretch reflex

A

amn , Ia afferent

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7
Q

In knee jerk reflex you should hit which tendon

A

Patella

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8
Q

If amn activated the …….. will increase

A

Action potential

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9
Q

In knee jerk reflex what happen when activate amn

A

Contraction of extrafusal muscle and agonist muscle

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10
Q

In knee jerk reflex what happen when inhibit amn

A

Relaxation of antagonist muscle and extrafusal muscle

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11
Q

Gamma motor neurones maintain what

A

The muscle tone during contraction

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12
Q

What is the receptor of inverse stretch reflex

A

Golgi tendon organ

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13
Q

What is the afferent neurone of inverse stretch reflex

A

Ib afferent

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14
Q

The relaxation of ipsilateral extensor is called

A

Reciprocal inhibition

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15
Q

The contraction of the contralateral extensor is called

A

Crossed extensor reflex

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16
Q

What are the symptoms of lower motor neurone syndrome

A

Paralysis , paresis , loss of reflex , reduce muscle tone

17
Q

What happen overtime with lower motor neurone syndrome

A

Wasting muscle and spontaneous twitching

18
Q

Motor neurone disease also called

A

ALS

19
Q

What happen in motor neurone syndrome

A

Degeneration of amn

20
Q

What happen overtime with motor neurone syndrome

A

Degeneration of neurone in the ventral spinal cord and brain stem

21
Q

What are the cause of motor neurone syndrome

A

Genetic, inflammation, viruses

22
Q

What are the symptoms of motor neurone syndrome?

A

Paralysis, paresis , reduce tone , decrease superficial reflex, hypoactive deep reflex

CNS physiology (3 decks)

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