Chapter 3 Flashcards
Central Nervous System?
Brain and spinal cord.
Peripheral nervous system?
Sensory and motor division.
Motor nervous system?
Somatic and autonomic nervous system.
Somatic nervous system?
Carries information away from CNS to muscles.
Autonomic nervous system?
Controls smooth muscles, organs, glands, etc.
3 phases of action potential?
Integration, propagation, and neurotransmitter release.
Intergration?
Determines if action potential will be sent.
Propagation?
Carries action potential down axon.
Neurotransmitter release?
Chemical released to allow communication with target tissue.
Functional unit of nervous system?
Motor unit.
Motor unit?
Single alpha motor nerve and all the muscle fiber it innervates.
Recruitment?
Voluntary activation of a motor unit.
Common myth around motor recruitment?
Light weights stimulate muscle fiber action. Greater force is needed for greater recruitment.
Performing slow repetitions with light weight yields similar neuromuscular responses as heavy loading and ballistic training. Less stress equals less recruitment.
Postactivation potentiation?
Type II motor units are easier to recruit after moderately high to high-intensity contraction.
Proprioceptors?
Pick up information on muscle length, joint position, movement, and tension.
Golgi tendon organs?
Proprioceptors in tendons that prevent an over stretch.
Muscle spindles?
Proprioceptors in muscle fibers that initiate the stretch reflex.
Unilateral training?
Training one limb at a time. Can be useful in injured athletes because the non-trained side can still benefit (Cross education).
Bilateral training?
Training both sides at the same time.
Parasympathetic division?
Returns body to homeostasis (rest & digest.
Sympathetic division?
Prepares body to react (fight or flight).
