Muscle Types & Movements
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Muscle Types & Movements
Anatomy & PhysiologyMrs. Halkuff
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3 Types of Muscle
Cardiac Muscle◦Involuntary◦Striated◦Intercalated Discs◦Contract in rhythmic fashion
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3 Types of Muscle
Smooth Muscle◦Involuntary◦Nonstriated◦Lines hollow organs: arteries, digestive tract, bladder, uterus, & lungs
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3 Types of Muscle
Skeletal Muscle◦Voluntary◦Striated◦Connect to the bones to produce movement.◦640 muscles in the body.
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Movement is produced by the contraction of muscles.
All descriptions of position and movement assume anatomical position.
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Origin, Insertion, & Action
Muscles have an Origin, Insertion, & Action.Origin: Muscle attachment to an
immovable bone.Insertion: Muscle attachment to a
moveable bone.Movement is a muscle’s insertion moving
toward or way from its origin.Action: The movement that is produced
from the muscle.
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ADJUSTING AN ANGLE BETWEEN TWO BODY PARTS
Flexion: Reduces the angle between two articulating elements.
Extension: Increases the angle between two articulating elements.
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ADJUSTING THE BODY IN RELATION TO THE MIDLINE OF THE BODY
Abduction: Movement away from the center/midline.
Adduction: Movement toward the midline of the body.
Refers to the appendicular skeleton only.
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MOTIONS IN AN ARCRotation: Turning the body on an axis,
such as shaking your head ‘no’.
Circumduction: Circular movements.
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ROTATION OF THE FOREARMPronation: Palm up to palm down.
Supination: Palm down to palm up
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MEDIAL & LATERAL FLEXION OF FOOTInversion: Movement of the foot inward,
toward the median plane.
Eversion: Movement of the foot outward, away from the median plane.
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FLEXION OF ENTIRE FOOTDorsiflexion: Elevating the sole and
digging the heel.
Plantar Flexion: Extending the ankle and elevating the heel. Pointing the toes.