Kinesiology 3480A/B Lecture Notes - Lecture 28: Gastrocnemius Muscle, Anti-Gravity, Closed Head Injury

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 3480A/B
• Professor: Matthew Heath

Document Summary

The nervous system topic #6 - closed-loop motor control part 7. Proprioceptive system: vestibular system: three fluid-filled half circles termed semicircular canals in the ear each oriented in different axis - components of the vestibular system. Provide information regarding position of the head relative to the rest of the body in any axis. Sensitive to each directional plane (x,y,z) - detects head moment in any axis. Since they are partially fluid filled they have tiny cilia that when you move, the fluid will move in the direction associated with head movement, the movement across the cilia cause them to bend. The bending of the cilia gives us sensory information output about the where head movement is relative to the rest of the body, also contributes to control of eye movement. Horizontal canal detects rotation of head around vertical axis (spinning) Anterior and posterior canals detect rotation in the sagittal plane (nodding) and in the frontal plane (completing a somersault)