Exercise PHYSIO lecture 8/26

consists of primary motor cortex and premotor cortex

receives input from sensory and limbic (motivational drives and needs)

conscious, voluntary motor movements

unconscious fine tuning of muscle activity required for highly-skilled movements (balance and stability)

"receives and relays"

relays information into the motor cortex for control of motor activities

• hearing
• touch
• sight
• smell
• taste
• kinesthetic awareness

"smooth movement"

functions in muscle tone, control of movement

• relay station for sensory input
• interprets sensory info such as: pain, temp, crude pressure and touch

connection for ascending and descending

control over visceral activities, water balance, body temp and sleep

hypothalamic releasing and inhibiting hormones control release of hormones from pituitary

• 90% cross over
• the other 10% do not (ipselateral)

coordination of movement

controls heart rate, blood flow, equilibrium, swallowing, salivation and respiration

controls respiration and facial expression

also, facial/neck sensations, eye movement, taste, salivation and equilibrium

conveys sensation of touch, proprioception and vibrations to thalamus

regulation of eye movement, pupil size and lens shape

role: sense length of muscle fiber, reflex contraction and co-activation (extra and intrafusal muscle cells)

reflex inhibtion

kinesthetic awareness (acceleration, deceleration, spacial awareness, joint angle, change in vibration, change in temp)