KIN 155 Lecture Notes - Lecture 2: Golgi Tendon Organ, Afferent Nerve Fiber, Mechanoreceptor

• School: University of Waterloo
• Department: Kinesiology
• Course: KIN 155
• Professor: Bill Mc Ilroy

Document Summary

Proprioception-sense of ones body position, orientation and forces. Touch- sense of contact on skin (force, shape, texture, etc) Somatosensory- sense organs from skin, muscles, joints, internal orgnans. Vestibular- inner ear organs to sense position of head movement and orientation. Photoreceptor- light (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) Found in skin, muscles, joints, viscera, inner ear. Converts- mechanical force to change in membrane potential. What defines the uniqueness of these receptors? the location. Responsible for generating the action potential that arrives (cid:1) (cid:1) (cid:1) Depends on: location of receptor, receptor morphology. Sensory cells fire to changes in muscle length. Thumb muscle- 29 spindles/ graam of muscle. Axial muscle- 2 spindles/ gram of muscle (cid:1) (cid:1) Golgi tendon organ in series with muscle fibres. What is the best way to activate gto"s? (cid:1) (cid:1) Why so many different receptors?- we have many things that need to be detected. (eg. touching a table feeling the bumps, grains, sharp corners)