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Muscle Fatigue
Decreased muscle performance after prolonged activity.
Isolated Stimulator
Device for electrically stimulating forearm nerves.
Recruitment
Increasing motor axons firing for stronger contractions.
Summation
Additive effect of muscle twitches from rapid stimuli.
Tetanus
Sustained muscle contraction without relaxation.
Motor Unit
Single motor neuron and its innervated fibers.
Action Potential
Electrical signal triggering muscle fiber contraction.
Acetylcholine
Neurotransmitter released at neuromuscular junction.
Calcium Ions [Ca2+]
Intracellular ions crucial for muscle contraction.
Twitch
Brief contraction of muscle fiber.
Grip Force
Force exerted by hand muscles during gripping.
Dynamometer
Device measuring grip strength.
Antagonistic Muscles
Muscles working oppositely to control movement.
Skeletal Muscle
Striated muscle attached to bones.
Fascicles
Bundles of muscle fibers in skeletal muscle.
Motor Axons
Nerve fibers controlling muscle contractions.
Neuromuscular Junction
Synapse between motor neuron and muscle fiber.
ATP
Energy source for muscle contraction.
Intracellular Supplies
Resources within cells for energy and contraction.
Electrical Pulse
Brief voltage applied for muscle stimulation.
Transducer
Device measuring physical forces generated by muscles.
Adductor Pollicis Muscle
Muscle responsible for thumb adduction.
