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EBR EMS Chapter 7 Definitions

abduction moving away from the center or midline
actin contractile protein found in the skin myofilament of skeletal muscle
adduction moving toward the center or midline
all or none when stimulated, a muscle fiber will contract fully or not at all
antagonist muscle those having opposing actions
bursa small cushionlike sacs found between moving body parts
carpal tunnel syndrome muscle weakness pain and tingling in the radial side of the wrist, hand, and fingers
concentric contraction type of isotonic muscle contraction in which a muscle's length decreases
disuse atrophy when prolonged inactivity results in the muscles getting smaller in size
dorsiflexion when the top of the foot is elevated with the toes pointing upward
eccentric contraction type of isotonic muscle contraction in which a muscle's length increases under a load
eversion foot movement that turns the ankle so that the sole faces out to the outside
extension increasing the angle between two bones at a joint
fatigue loss muscle power
flexion act of bending, decreasing the angle between two bones at the joint
hypertrophy increased size of a part caused by an increase in the size of its cell
hypothermia subnormal core body temp below 37 degrees C
insertion attachment of a muscle to the bone that it moves when contraction occurs
inversion foot movement that turns the ankle so that the sole faces inward townard the midline of the body
isometric contraction type of muscle contraction in which muscle does not shorten
isotonic contraction of the same pressure or tension
motor neuron transmits nerve impulses from the brain and spinal cord to muscles and glandular epithelial tissues
motor unit a single motor neuron with the muscle cells it innervates
myofilament ultramicroscopic , threadlike structures found n myofibrils
myosin contractile protein found in the thick filaments of skeletal muscle
neuromuscular junction the point of contact between the nerve endings and muscle fibers
origin the attachment of a muscle to the bone that does not move when contraction occurs, as distinquished from insertion
oxygen debt continued increased metabolism that occurs in a cell to remove excess lactic acid that resulted from exercise
paralysis loss of the power of motion, especially voluntary motion
plantar flexion
posture k
prime mover k
pronation k
rotation k
sarcomere k
sliding filament theory k
supination k
synergist muscle k
tendon k
tensynovitis k
tetanic contraction k
threshold stimulus k
tonic contraction
Created by: hjkruse