Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
Ia sensory fibers
|
primary ending of spindle, large and myelinated, rapidly adapting, provides velocity sensitivity or movement sense
|
|
IIa sensory fibers
|
myelinated, but smaller, conduct slower, slow adapting, provide static sensitivity or position sense
|
|
How do Ia sensory fibers respond to intrafusal stretching
|
respond to dynamic component of stretching
|
|
How do IIa sensory fibers respond to intrafusal stretching
|
respond continuously although at different rates
|
|
Intrafusal fibers receive efferent input from...
|
gamma motor neurons
|
|
Golgi tendon organ
|
is in series with muscle, senses information about the tension
|
|
Muscle spindle
|
in parallel with the muscle, detects length/position
|
|
What is the simplest spinal reflex
|
monosynaptic stretch reflex
|
|
Describe stretch reflex
|
group Ia fibers are activated by muscle stretch, they directly stimulate alpha motor neurons that innervate extrafusal fibers of the same muscle, accomplished by Ia inhibitory interneuron
|