Elbow Study Guide

Front 1

Degrees of Motion

Back 1

1 (flexion/extension)

Front 2

What joints make up the elbow joint?

Back 2

Humeroulnar and humeroradial

Front 3

What part of the humerus does the radius articulate with?

Back 3

Capitulum

Front 4

What part of the humerus does the ulna articulate with?

Back 4

Trochlea

Front 5

What is the convex surface of the elbow?

Back 5

Distal Humerus

Front 6

Describe the arthrokinematics in an open kinetic chain of the humeroulnar joint.

Back 6

During flexion the ulna rolls and glides anteriorly. During extension the ulna rolls and glides posteriorly.

Front 7

Describe the arthrokinematics in an open kinetic chain of the humeroradial joint.

Back 7

During flexion the radius rolls and glides anteriorly. During extension the radius rolls and glides posteriorly.

Front 8

Describe the arthrokinematics in a closed kinetic chain of the humeroradial joint.

Back 8

During flexion the capitulum rolls anteriorly and glides posteriorly and just the opposite during extension.

Front 9

Describe the arthrokinematics in a closed kinetic chain of the humeroulnar joint.

Back 9

During flexion the trochlea rolls anteriorly and glides posteriorly and just the opposite during extension.

Front 10

Describe what is meant by a normal carrying angle?

Back 10

Since the elbow's axis extends slightly obliquely in a med-lateral direction it creates a valgus angle of 18 degrees.

Front 11

What is the closed packed position for the elbow?

Back 11

Extension

Front 12

What motion stresses the medial collateral ligament in the elbow?

Back 12

Valgus

Front 13

What motion stresses the lateral collateral ligament in the elbow?

Back 13

Varus

Front 14

Durning what motion does the anterior aspect of the capsule of the elbow become taut?

Back 14

Extension

Front 15

Durning what motion does the posterior aspect of capsule of the elbow become taut?

Back 15

Flexion

Front 16

Name 3 muscles that flex the elbow.

Back 16

Biceps, brachioradialis, and brachialis

Front 17

Name the insertion of the biceps.

Back 17

Bicipital tuberosity of the radius

Front 18

Name the nerve and nerve root innervates the biceps and brachialis

Back 18

Musculocutaneous, C6

Front 19

What nerve and nerve root innervates the supinator?

Back 19

Radial, C6

Front 20

Passive length-tension

Back 20

Ocurrs when the parallel and series elastic components are stretched within a muscle.

Front 21

Active length-tension

Back 21

The force generated by a muscle in response to a stimulus from the nervous system.

Front 22

Resting length

Back 22

The length that allows the greatest number of cross-bridge attachments and, therefore, the greatest potential active force.

Front 23

What nerve and nerve roots innervate the triceps?

Back 23

Radial, C7 and C8

Front 24

What nerve and nerve root innervates the brachioradialis?

Back 24

Radial C6

Front 25

What nerve and nerve root innervates the pronator teres?

Back 25

Median, C7

Front 26

What nerve and nerve root innervates the pronator quadratus?

Back 26

Median, C8

Front 27

What type of joint is the proximal radioulnar joint? What are the arthrokinematics that occur at the proximal radioulnar joint during supination?

Back 27

Pivot joint, Spin

Front 28

What are the arthrokinematics that occur at the distal radioulnar joint during supination?

Back 28

The radius is the concave (CC) therefore it rolls and glides medially