KIN 121 Lecture Notes - Lecture 12: Hypertrophy, Adenosine Triphosphate, Golgi Tendon Organ
Document Summary
Vestibular system- tells us where our body is in space (semi-circular canals in inner: ties in heavily with the visual system. Proprioceptive- tells us where our body parts are relative to our body (in muscle, tendon, and joint capsules: muscle spindle- senses stretch in muscle (sensitive to rate of stretch) Stretch reflex (myotatic)- stretched muscle causes reflexive contraction of muscle being stretched. Sensory impulse also sent to cerebellum: tendon receptors (golgi tendon organ)- senses muscle tension. Inverse myotatic reflex- tension on tendon causes reflexive relaxation of muscle being contracted. Sensory impulse also sent to cerebellum: joint capsule receptors- senses compression in joint capsule. Coordinated movement needs sensory feedback: particularly kinesthetic feedback, specifically proprioceptive feedback. Muscles are driven by neural impulses which can be volitional or reflective. Muscle force can be neutrally enhanced: increasing stimulation frequency, recruiting more motor units (one nerve and all of the fibers attached to it, synchronizing the firing of motor units, reducing inhibitory firing.
