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28 Cards in this Set

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