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28 Cards in this Set
- Front
- Back
Degrees of Motion
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1 (flexion/extension)
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What joints make up the elbow joint?
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Humeroulnar and humeroradial
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What part of the humerus does the radius articulate with?
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Capitulum
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What part of the humerus does the ulna articulate with?
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Trochlea
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What is the convex surface of the elbow?
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Distal Humerus
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Describe the arthrokinematics in an open kinetic chain of the humeroulnar joint.
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During flexion the ulna rolls and glides anteriorly. During extension the ulna rolls and glides posteriorly.
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Describe the arthrokinematics in an open kinetic chain of the humeroradial joint.
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During flexion the radius rolls and glides anteriorly. During extension the radius rolls and glides posteriorly.
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Describe the arthrokinematics in a closed kinetic chain of the humeroradial joint.
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During flexion the capitulum rolls anteriorly and glides posteriorly and just the opposite during extension.
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Describe the arthrokinematics in a closed kinetic chain of the humeroulnar joint.
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During flexion the trochlea rolls anteriorly and glides posteriorly and just the opposite during extension.
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Describe what is meant by a normal carrying angle?
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Since the elbow's axis extends slightly obliquely in a med-lateral direction it creates a valgus angle of 18 degrees.
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What is the closed packed position for the elbow?
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Extension
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What motion stresses the medial collateral ligament in the elbow?
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Valgus
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What motion stresses the lateral collateral ligament in the elbow?
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Varus
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Durning what motion does the anterior aspect of the capsule of the elbow become taut?
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Extension
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Durning what motion does the posterior aspect of capsule of the elbow become taut?
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Flexion
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Name 3 muscles that flex the elbow.
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Biceps, brachioradialis, and brachialis
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Name the insertion of the biceps.
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Bicipital tuberosity of the radius
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Name the nerve and nerve root innervates the biceps and brachialis
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Musculocutaneous, C6
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What nerve and nerve root innervates the supinator?
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Radial, C6
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Passive length-tension
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Ocurrs when the parallel and series elastic components are stretched within a muscle.
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Active length-tension
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The force generated by a muscle in response to a stimulus from the nervous system.
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Resting length
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The length that allows the greatest number of cross-bridge attachments and, therefore, the greatest potential active force.
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What nerve and nerve roots innervate the triceps?
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Radial, C7 and C8
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What nerve and nerve root innervates the brachioradialis?
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Radial C6
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What nerve and nerve root innervates the pronator teres?
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Median, C7
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What nerve and nerve root innervates the pronator quadratus?
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Median, C8
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What type of joint is the proximal radioulnar joint? What are the arthrokinematics that occur at the proximal radioulnar joint during supination?
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Pivot joint, Spin
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What are the arthrokinematics that occur at the distal radioulnar joint during supination?
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The radius is the concave (CC) therefore it rolls and glides medially
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