12 - Simple Reflexes Flashcards
1
Q
define reflex?
A
stereotypes involuntary
to a specific sensory input
2
Q
need for reflexes?
A
protection
posture control
homeostasis
3
Q
pathway in a muscle spindle?
A
axon
synapse in ventral horn
motor back to effector
MONOSYNAPTIC PATHWAY
4
Q
how does a reflex occur [muscle spindles]
A
muscle stretch [mechanore] over threshold action potential in afferent release NT excitatory excites motor [release ACh] muscle contract
5
Q
understand knee jerk reflex?
A
.
6
Q
pathway in a GOLGI Torgan?
A
sensory neurone
INHIBITORY inteneurnone
motor efferent
POLYSYNAPTIC
7
Q
myotatic and inverse myotatic?
A
myotatic
increase sensory activity = increases effector activity
inevre m
increase sen = decreased effector activity
8
Q
understand crossed extensor muscle example?
A
.
