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Glossary of Muscular System 2

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sphincter
A ring-like band of muscle fibers that closes a natural orifice.
pronation
the act of turning the palm or sole of the foot backward or downward
supination
the act of turning the palm or sole of the foot forward or upward
myoedema
Swelling or edema of a muscle.
involuntary muscle
A muscle that is not controlled by the patient.
gluteus
The buttock muscle.
tendon
A strong, fibrous band of tissue that attaches muscle to bone.
gastrocnemius
The calf muscle
ligament
A strong band of fibrous tissue that holds bones to bones or supports large organs.
myogelosis
Hardening of a muscle.
tone, tonus
Slight, continuous contraction of muscle.
adduction
drawing toward the midline
antagonist
A muscle that opposes the action of another muscle.
pectoralis major and pectoralis minor
Chest muscles.
abduction
drawing away from
passive movement
Any movement involving the contraction of muscles with the energy supplied from an outside source.
myotasis
Stretching of muscle.
voluntary muscle
A muscle that is controlled by the patient.
muscle
An organ that by contracting produces movement.
extension
straightening
medial rotation
turning toward the midline
circumduction
circular movement
active movement
Voluntary movement involving the contraction of muscles with energy supplied by the patient.
spasm
An involuntary contraction of a muscle.
flaccid
limp
lateral rotation
turning away from the midline
hyperextension
extreme or excessive straightening
fascia
A band of tissue enveloping muscles and certain organs of the body.
flexion
bending
deltoid
The triangular muscle that invests the shoulder.
myodiastasis
Separation of a muscle.
popliteus
Muscle posterior to the knee.
contracture
A shortened or distorted muscle.
asthenia
weakness
synergist
A muscle that acts together with another.
ambulation
walking

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