Lecture 3 Flashcards
Each alpha motorneuron ( amn ) innervates several ……..
Muscle
Each muscle innervated by one ……
amn
Force of contraction depend on
Numbers of motor unit , frequency of action potential
Ia afferent is activated by
Rapid change in the length of the muscle
Golgi tendon organ is sensitive to ………
Muscle tension
What are the two neurones involved in stretch reflex
amn , Ia afferent
In knee jerk reflex you should hit which tendon
Patella
If amn activated the …….. will increase
Action potential
In knee jerk reflex what happen when activate amn
Contraction of extrafusal muscle and agonist muscle
In knee jerk reflex what happen when inhibit amn
Relaxation of antagonist muscle and extrafusal muscle
Gamma motor neurones maintain what
The muscle tone during contraction
What is the receptor of inverse stretch reflex
Golgi tendon organ
What is the afferent neurone of inverse stretch reflex
Ib afferent
The relaxation of ipsilateral extensor is called
Reciprocal inhibition
The contraction of the contralateral extensor is called
Crossed extensor reflex
What are the symptoms of lower motor neurone syndrome
Paralysis , paresis , loss of reflex , reduce muscle tone
What happen overtime with lower motor neurone syndrome
Wasting muscle and spontaneous twitching
Motor neurone disease also called
ALS
What happen in motor neurone syndrome
Degeneration of amn
What happen overtime with motor neurone syndrome
Degeneration of neurone in the ventral spinal cord and brain stem
What are the cause of motor neurone syndrome
Genetic, inflammation, viruses
What are the symptoms of motor neurone syndrome?
Paralysis, paresis , reduce tone , decrease superficial reflex, hypoactive deep reflex
