Lecture 8

Question 1

3 types of movements generated by motor system

Answer 1

relfexive
rhythmic
voluntary

Question 2

FN of basal ganglia

Answer 2

initiating movement + postural adjusments for movements

Question 3

FNs of cerebellum

Answer 3

coordinating movement

Question 4

upper motor neurons found in

Answer 4

cortex + BS

Question 5

lower motor neurons found in

Answer 5

BS+ SC

Question 6

Fns of sk muscle

Answer 6

coordinate eye movements
speech
respiration (diaphragm)
move bones around joints

Question 7

sk muscle is innervated by?

Answer 7

α and γ- motor neurons

Question 8

alpha motor neurons innervate muscles that?

Answer 8

generate force

Question 9

gamma motor neurons innervate which muscles?

Answer 9

muscle spindles

Question 10

upper motor neurons innervate?

Answer 10

lower motor neurons

spinal interneurons

Question 11

motor neurons the innervate more distal muscles are more ____ located in the ventral horn

Answer 11

laterally

Question 12

motor neurons the innervate more proximal muscles are more ____ located in the ventral horn

Answer 12

medially

Question 13

two ways of controlling muscle force

Answer 13

1. firing rate

2. size principal and tetanus

Question 14

SO have what levels of

a) oxidative capacity
b) ATPase
c) glycolytic metabolism

Answer 14

a) high
b) low
c) low

Question 15

FFR have what levels of

a) oxidative capacity
b) ATPase
c) glycolytic metabolism

Answer 15

a) high
b) high
c) high

Question 16

FF have what levels of

a) oxidative capacity
b) ATPase
c) glycolytic metabolism

Answer 16

a) low
b) high
c) high

Question 17

muscle spindles run ____ with ____

Answer 17

a) parallel

b) extrafusal fibers

Question 18

muscle spindles use what type of sensory axons

Answer 18

1a

Question 19

FN of muscle spindles

Answer 19

monitor muscle LENGTH

Question 20

GTO run ____ with_____

Answer 20

in series

extrafusal

Question 21

GTO use what type of sensory axon

Answer 21

1b

Question 22

GTO detect

Answer 22

changes in muscle TENSION

Question 23

both muscle spindles and GTO’s send info about what back to the cortex

Answer 23

muscle posture and contraction

Question 24

which reflex is polysynaptic

Answer 24

flexion - extension

Question 25

which reflex is monosynaptci

Answer 25

stretch reflex

Question 26

when do we activate the reverse myotatic reflex

Answer 26

when too much force is being generated so we activated an inhibitory interneuron to correct for that (inhibiting the muscle that is exerting too much force)