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Unformatted text preview: rve fibers located in the fibrous
part of the joint capsule. They signal static
joint position, joint movement, direction and
speed of movement.
Type 2 – Paciniform receptors are rapidly
adapting nerve fibers located in the fibrous
part of the joint capsule. They signal joint
movement, particularly movement velocity.
Type 3 – slow adapting receptors that
resemble the tendon organ is found only in
ligaments. Its functional role is unknown.
Type 4 – free nerve ending located in both
the fibrous capsule and ligaments. They
signal tissue damage (nociception). Proprioception: Joint Receptors
• Early evidence (Skoglund, 1956):
different receptors fire at different
ranges of joint angles
• Recent evidence: depends on factors
such active/passive motion, direction of
• Most fire near extreme joint angles…..
Limited involvement in proprioception 13 7/4/12 Proprioceptors: Which is most important?
1960s controversy - which sensor provides “position sense”?
Cutaneous? Proprioceptors? Joint Receptors?
Resolved by “Muscle Vibration Experiments” (Matthews, 1972)! Standing Posture Illusions! The Pinocchio Illusion!! Proprioceptors and Sensory Illusions Lackner & DiZio, 2000 14...
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- Fall '08