APA 2120 Lecture Notes - Lecture 3: Tai Chi, Biceps Curl, Afferent Nerve Fiber

• School: University of Ottawa
• Department: Human Kinetics
• Course: APA 2120
• Professor: Diane Ste- Marie

Document Summary

Sense of body position and orientation in space. Proprioceptive system sensory receptors in: joints, skin, tendons, muscles. Afferent vs efferent: afferent nerve fibers (sensory neurons) Sends impulses from the central nervous system to limbs and organs: e. g. , after the spinal cord receives pain signal, an efferent signal is sent to the hand to pull it away. *3 jobs required for any voluntary movement: translate the intention to perform a movement into motor control signals, transmit the control signals to the relevant muscles. Efference = signals from the brain to the muscles (e. g. , turn on biceps and turn off triceps during a biceps curl, control of posture during reaching tasks) Must take into consideration the structure the body (e. g. , amputee performing a skill: monitor sensory info generated by the movement which travels back to the brain to keep it informed about the accuracy of the movement. Afference = all sensory information reaching the brain.