Joints of UE Flashcards

1
Q

What’s important about the transverse humeral ligament (of the glenohumeral joint)

A

Spans greater and lesser tubercles of humerus to hold the tendon of the long head of biceps brachii m. in place

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2
Q

What does the glenohumeral ligament connect?

A

Supraglenoid tubercle to lesser tubercle of humerus

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3
Q

What is the glenoid labrum (of the glenohumeral joint) and what’s its function?

A

Fibrocartilaginous ligament surrounding the glenoid cavity that deepens the socket

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4
Q

What is the function of the bursae?

A

Allow greater ease of movement (mm. slide back and forth)

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5
Q

What type of joint is the acromioclavicular (AC) joint?

What are 3 important parts of it?

A
  • Synovial planar joint

- Joint capsule; AC ligament; caracoclavicular ligaments

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6
Q

What type of joint is the glenohumeral joint?

A

Multiaxial, synovial, ball-and-socket joint

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7
Q

The coracohumeral ligament is part of what joint?

A

Glenohumeral joint

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8
Q

What is “frozen shoulder”?

A

Tightening of the shoulder ligaments leads to difficult abducting shoulder greater than 90 degrees. Tx: PT, but resolves itself after about 2 years.

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9
Q

What type of joint is the humero-ulnar joint?

A

Uniaxial, synovial, hinge joint

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10
Q

What type of joint is the proximal radio-ulnar joint?

A

Uniaxial, synovial, pivot joint

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11
Q

What where is the annular ligament and what is its function?

A
  • Surrounds radial head and radial notch of ulna.

- Keeps head of radius in notch; permits pronation and supination (recall: radius flips while ulna is in place)

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12
Q

What type of joint is the interosseous membrane?

A

Fibrous joint (syndesmosis)

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13
Q

What type of joint is the distal radio-ulnar joint?

A

Uniaxial, synovial joint

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14
Q

Describe the radio-carpal joint.

A

Biaxial, synovial, ellipsoid

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15
Q

What sits on the distal end of the ulna and why?

A

An articular disc–covers ulna so ulna itself doesn’t articular w/wrist bone (only radius articulates w/wrist, only ulna w/humerus)

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16
Q

What are the articulations of the ulnar collateral ligament?

A

Medial epicondyle to coronoid process (it’s a triangular ligament w/distinct bands)

17
Q

What are the articulations of the radial collateral ligament?

A

Lateral epicondyle to radial notch of ulna and annular ligament (posterior stability; weak)

18
Q

What type of joint are intercarpal joints and what movements do they permit?

A

Synovial plane joints, permit minor sliding/gliding (bones are joined by various ligaments)

19
Q

What type of joint are carpometacarpal joints?

A

Plane, synovial (except thumb) that allow gliding

20
Q

What type of joint is the trapeziometacarpal joint (TMC) and what movements does it allow?

A

Biaxial saddle joint, allowing flexion, extension, adduction, abduction, and opposition of thumb

21
Q

What type of joint are metacarpophalangeal joints?

A

Biaxial, condyloid synovial joints

22
Q

What type of joints are interphalangeal joints and what movements do they allow?

A

Uniaxial synovial joints, allow flexion and extension only