L11

Question 1

what does mechanical deformation mean in terms of GTO

Answer 1

by lengthening the muscle the GTO gets squished, so the collagen fibers get squished causing the Ib afferents to get mechanically deformed and the deformation causes an AP in the spinal cord by opening calcium gated channels

Question 2

what are some non linear characteristics of GTO

Answer 2

• does not summate
• not all MU activate the Ib
• activation of MU through a GTO does not keep increasing GTO firing proportionally

Question 3

what are GTOs sensitive to

Answer 3

• quick changes in muscle tension
• sensitive to force and rate of change in force

Question 4

T or F: GTOs respond to muscle stretch

Answer 4

T just much less effectively than muscle spindles

Question 5

what are the 4 types of receptors located in the joints

Answer 5

• Ruffini-ending like
• pacinian-corpuscle-like
• GTO-like
• Free nerve endings

Question 6

Type I or Ruffini endings location and role

Answer 6

found in the joint capsule
- joint position, displacement, angular velocity and intra articular pressure

Question 7

Type II or Pacinian Corpuscles location and role

Answer 7

found in joint capsule
- acceleration of the joint

Question 8

Type III golgi endings location and role

Answer 8

in the joint ligament
- tension in ligaments (at extremes of movements)

Question 9

Type IV free nerve endings location and role

Answer 9

throughout the connective tissue
- pain