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UE specific joints- elbow Flashcards

articulations, muscle actions and primary structures

1
Q

what kind of joint is the elbow joint?

A

synovial, hinge

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2
Q

what 3 bones make up the elbow joint?

A

humerus
radius
ulna

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3
Q

what are the elbow joint’s three primary articulations?

A

radiohumeral joint
ulnohumeral joint
proximal radioulnar joint

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4
Q

what bones articulate to form the hinge allowing the elbow joint to be classified as a hinge joint?

A

the ulna and humerus

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5
Q

the radiohumeral joint is composed of what structures?

A

the capitulum of the distal humerus
the head of the radius

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6
Q

what structure makes up the proximal joint surface of the radiohumeral joint of the elbow?

A

the capitulum of the distal humerus

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7
Q

what structure makes up the distal joint surface of the radiohumeral joint of the elbow?

A

the head of the radius

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8
Q

within the radiohumeral joint of the elbow, the capitulum of the distal humerus is __ in shape and the head of the radius is __ in shape

A

convex (ball-shaped); concave

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9
Q

what is the capsular pattern of the radiohumeral joint of the elbow?

A

elbow flexion
elbow extension
forearm supination
forearm pronation

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10
Q

what is the loose packed position of the radiohumeral joint of the elbow?

A

full elbow extension
forearm supination

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11
Q

what is the close packed position of the radiohumeral joint of the elbow?

A

90 deg elbow flexion
5 deg supination

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12
Q

what are the osteokinematic motions of the radiohumeral joint of the elbow?

A

elbow flexion
elbow extension
forearm supination
forearm pronation

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13
Q

what structures is the ulnohumeral joint of the elbow formed by?

A

trochlea (hour-glassed shape) of the humerus
trochlear notch of the ulna

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14
Q

what is the capsular pattern of the ulnohumeral joint of the elbow?

A

flexion
extension

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15
Q

what is the loose packed position of the ulnohumeral joint of the elbow?

A

70 deg elbow flexion
10 deg supination

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16
Q

what is the closed packed position of the ulnohumeral joint of the elbow?

A

elbow extension

17
Q

what are the osteokinematic motions of the ulnohumeral joint of the elbow?

A

flexion
extension

18
Q

what structures make up the proximal radioulnar joint of the elbow?

A

the radial notch of the ulna
rim of the radial head

19
Q

within the proximal radioulnar joint of the elbow, the radial notch of the ulna is __ in shape and the rim of the radial head is __ in shape

A

concave; convex

20
Q

what is the capsular pattern of the proximal radioulnar joint of the elbow?

A

supination, pronation

21
Q

what is the loose packed position of the proximal radioulnar joint of the elbow?

A

70 deg elbow flexion
35 deg forearm supination

22
Q

what is the close packed position of the proximal radioulnar joint of the elbow?

A

5 deg supination

NPTE (30 decks)

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