Lab 3 - Articulations and Movement

Lab 3 - Articulations and Movement - Movements and Muscles...

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Movements and Muscles of the Upper Extremity
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Movements Flexion Decreasing a joint angle Extension Increasing a joint angle Hyperextension Increasing the angle farther than normal Past the joints straight upright position
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Movements Abduction Away from the midline Adduction Towards the midline Lateral Flexion Adduction in the lateral plane Bend torso to the side (decreasing angle of joint) Medial and Lateral Rotation (feet) Rotation along the long axis
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Movements Circumduction Cone shaped movement Opposition Touching thumb to other fingers, via saddle joint Plantar Flexion Extends ankle joint and elevates heel (stand on tip toes) Dorsiflexion At ankle joint and elevates the sole, dig in your heel
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Movements Movements of the radius and ulna Supination – turns wrist and palm facing up Pronation –turns wrist and palm facing down Movements of the foot Inversion: motion of foot sole inward Eversion: sole pointing outward
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Movements Protraction – bringing jaw forward Retraction – bringing jaw back Movement in the transverse plane Mandible movement Elevation – to raise up Depression – to press down Movement superior and inferiorly Shoulder movement up and down Gliding Bones slipping across each other (wrist bones)
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Muscles of the Upper Extremity
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Muscle Attachments Tendons: Attach muscle to bone Origin: Usually the proximal muscle attachment site (remains relatively fixed) Insertion: point where muscle attaches “Moveable attachment site”: moves toward the origin during contraction
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Muscle Roles Prime Movers (Agonists) Provide the major moving force Antagonists Oppose or reverse Agonists movement Synergists Assist with Agonist movement by neutralizing
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Lab 3 - Articulations and Movement - Movements and Muscles...

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