Motor Units/Types Flashcards
What does the somatic motor system supply to?
all skeletal muscle
What does the UMN involve?
brain
What does the LMN involve?
brainstem + ventral horn
What do alpha MN innervate?
force
What do gamma MN innervate?
innervates sensory organs
what levels do the supinator involve?
C5/6
What levels do the biceps involve?
C5/6
What level does triceps involve?
C7
What level do the quadriceps involve?
L3/4
What level do the gastrocnemius involve?
S1
What is the function of then golgi tendons?
maintains muscle tension
prevents muscle overload
What are golgi tendons innervated by?
group Ib sensory
what are golgi tendons?
junction of muscles and tendons
How is ATP generated in type 1 muscle?
oxidative phosphorylation
what muscle type is fatigue resistant?
type 1
why are type 1 muscles red?
high content of Hb
How is ATP generated in Type IIa muscle?
oxidative phosphorylation
How is ATP generated in Type IIb muscle?
glycolysis
What is the action carried out by type IIa muscle?
fast contraction + relaxation
Why is type IIb muscle red?
increased vasculature
What type of muscle is not fatigue resistant?
Type IIb
what muscle type is pale and why?
Type IIb + less vasculature
What MN do group Ib sensory synapse upon?
What reflex does this cause?
alpha MN
reverse myotactic reflex
What do the axial muscles do?
controls trunk
