32. 1. Plantar reflex
• - method: Scratching the
lateral edge of the sole with a
blunt object
• - result: plantar flexion of the
toes.
• Center: S1,2
33.
34. 2. Flexor withdrawal reflex:
• protective reflex
• prepotent; that is, they preempt
(precede)
• polysynaptic reflex with a central
delay of more than 3 milliseconds.
v
v
43. Wednesday, November 28, 2018 43
3-10 muscle fibers
central non-contractile part
called the receptor area
peripheral contractile part
peripheral contractile part
52. α
γ
Wednesday, November 28, 2018 52
α
γ
Primary or annulospinal endings
myelinated group Ia
Primary or annulospinal endings
myelinated group Ia
Secondary or flower spray endings
type II myelinated
Dynamic
gamma
efferent
Static
gamma
efferent
Alpha motor neuron
thick myelinated
Alpha motor neuron
thick myelinated
53. α
γ
Wednesday, November 28, 2018 53
α
γ
Dynamic
gamma
efferent
Static
gamma
efferent
Alpha motor neuron
thick myelinated
Alpha motor neuron
thick myelinated
Primary or annulospinal endings
myelinated group Ia
Secondary or flower spray endings
type II myelinated
Dynamic response (dynamic stretch reflex - tendon jerk) Static response (static stretch reflex – skeletal muscle tone)
54. α
Wednesday, November 28, 2018 54
α
Alpha motor neuron
thick myelinated
Alpha motor neuron
thick myelinated
Stretching Stretching
γ γ
Dynamic
gamma
efferent
Static
gamma
efferent
Primary or annulospinal endings
myelinated group Ia
Secondary or flower spray endings
type II myelinated
Dynamic response (dynamic stretch reflex - tendon jerk) Static response (static stretch reflex – skeletal muscle tone)
55. α
γ
Wednesday, November 28, 2018 55
α
γ
Dynamic
gamma
efferent
Static
gamma
efferent
Alpha motor neuron
thick myelinated
Alpha motor neuron
thick myelinated
Primary or annulospinal endings
myelinated group Ia
Secondary or flower spray endings
type II myelinated
Dynamic response (dynamic stretch reflex - tendon jerk) Static response (static stretch reflex – skeletal muscle tone)
