cote

Question 1

neural basis for reflexes

Answer 1

i guess just know about mono di an dpolysynaptic spinal reflexes

Question 2

Ia afferent reflex

Answer 2

stretch reflex and reciperocal inhibition
spindle is receptor for stretching
1a afferent is sensory neuron
for stretch reflex it is monosynapitc to agonist
for RI it is disynapitc and inhibits antagonist
motor neuron and then muscle

Question 3

Ib afferent reflex

Answer 3

autogenic inhibition
golgi tendon organ is tension receptor for contraction
1b afferent is sensory neuron
can decrease tension or be negative feedback loop to maintain tension
di or polysynaptic with interneurons before mucle tendon is on
phase dependent so in rest phase (disynaptic) it will inhibit but in stance phase CpGs (polysynaptic) will overrule and excite motor neuron

Question 4

flexion withdrawal and cross extension reflexes

Answer 4

receptor is nociceptors 
Adelta from hurt side
polysynaptic
ipslitaeral flexion to get away
contralateral extension to stand

Question 5

models for studying locomotion

Answer 5

Cats
decerebrate shows dont need brain
spinal shows dont need brainstem
fictive locomotion shows dont need afferents
so its not a reflex but something else

Question 6

are reflexes hardwired

Answer 6

no, integrated activiteis not just isolated reflex arcs

shown with relfex conditioning and finger inversion withdrawal

Question 7

reflex arc components

Answer 7

receptor - detect
sensory neuron - afferent to CNS
integration center - interneuronal relay (0 to x, so could be missing)
motoneuron - impulse to effector
effector - like muslce or gland