Musculoskeletal Receptors

Question 1

What is a muscle spindle composed of?

Answer 1

Muscle fibers, sensory endings, and motor endings

Question 2

What are both ends of a fusiform?

Answer 2

Tapered

Question 3

Extrafusal

Answer 3

Skeletal muscle fibers outside the spindle

Question 4

Intrafusal

Answer 4

Fibers inside the spindle

Question 5

What do muscle spindles respond to?

Answer 5

Stretch

Question 6

What do type 1a afferents do?

Answer 6

Register quick tonic stretch of muscle spindle

Question 7

What do type 2 afferents do?

Answer 7

Monitor tonic stretch (no velocity)

Question 8

What do joint receptors respond to?

Answer 8

Deformation of joint capsule and ligaments

Question 9

What do paciniform corpuscles respond to?

Answer 9

Movement (type 2 afferent)

Question 10

What do ruffinis endings respond to?

Answer 10

Passive movement and extremes of joint range (type 2 afferents)

Question 11

What do ligament receptors respond to?

Answer 11

Signal tension (type Ib afferents)

Question 12

What are free nerve endings stimulated by?

Answer 12

Inflammation (type 3 and 4)

Question 13

Golgi tendon organ

Answer 13

Signal the force generated by the muscle contraction or by a passive stretch of the tendon