Motor Units/Types Flashcards by Meera Patel | Brainscape

Q

What does the somatic motor system supply to?

A

all skeletal muscle

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Q

What does the UMN involve?

A

brain

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Q

What does the LMN involve?

A

brainstem + ventral horn

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Q

What do alpha MN innervate?

A

force

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Q

What do gamma MN innervate?

A

innervates sensory organs

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Q

what levels do the supinator involve?

A

C5/6

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Q

What levels do the biceps involve?

A

C5/6

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Q

What level does triceps involve?

A

C7

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Q

What level do the quadriceps involve?

A

L3/4

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Q

What level do the gastrocnemius involve?

A

S1

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Q

What is the function of then golgi tendons?

A

maintains muscle tension

prevents muscle overload

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Q

What are golgi tendons innervated by?

A

group Ib sensory

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Q

what are golgi tendons?

A

junction of muscles and tendons

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Q

How is ATP generated in type 1 muscle?

A

oxidative phosphorylation

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Q

what muscle type is fatigue resistant?

A

type 1

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Q

why are type 1 muscles red?

A

high content of Hb

Q

How is ATP generated in Type IIa muscle?

A

oxidative phosphorylation

Q

How is ATP generated in Type IIb muscle?

A

glycolysis

Q

What is the action carried out by type IIa muscle?

A

fast contraction + relaxation

Q

Why is type IIb muscle red?

A

increased vasculature

Q

What type of muscle is not fatigue resistant?

A

Type IIb

Q

what muscle type is pale and why?

A

Type IIb + less vasculature

Q

What MN do group Ib sensory synapse upon?

What reflex does this cause?

A

alpha MN

reverse myotactic reflex

Q

What do the axial muscles do?

A

controls trunk