10-13 Joints UE

Question 1

Shoulder Glenohumeral Joint [4]

Answer 1

1. Multiaxial
2. Synovial
3. Ball&socket joint
4. MOST easily dislocated

Question 2

What is the purpose of the Joint Capsule?

Answer 2

Surrounds the joint and permits its movement

Question 3

Coracohumeral ligament

Answer 3

Attaches Coracoid process to Humeral GREATER tubercle

Question 4

Glenohumeral ligament

Answer 4

ALL AROUND LIGAMENT WRAP attaching [scapula Supraglenoid tubercle] to [humerus ANT lesser tubercle]

Question 5

Transverse humeral ligament [2]

Answer 5

1. Spans Humerus greater & lesser tubercles

2. Holds Bicep Long head tendon in place

Question 6

Glenoid labrum

Answer 6

fibrocartilaginous ligament surrounding Glenoid cavity margin» that deepens the Socket

Question 7

What is the purpose of the [Bursae] and where can you find it? (3)

Answer 7

Allow greater ease of movements

a. subacromial
b. subdeltoid
c. subscapular

Question 8

1. Acromioclavicular Joint (AC)
2. What ligaments does it contain [2]

B: This joint is found where?

Answer 8

1. Synovial planar joint that allows gliding movement during arm movement & scapula rotation
2. Contains acromioclavicular ligament & 2 Coracoclavicular ligaments

B: between Acromion & Clavicle

Question 9

A: Describe the [ Humero-ulnar joint ]
B: Describe its Joint Capsule

C: Name and Describe the ligament it houses?

Answer 9

A: Uniaxial, synovial ginglymus hinge joint
B: surrounds joint and permits flexion & extension

C: ULNAR COLLATERAL LIGAMENT=triangular ligament w/distinct bands tht connects [medial epicondyle] to
[elbow coronoid & olecranon process]

Question 10

[ Humeroradial joint ]
A: Describe its Joint Capsule

B: Name and Describe the ligament it houses?

Answer 10

A: Surrounds capitulum and radius head

B: RADIAL COLLATERAL LIGAMENT= weak but posterolaterally stable ligament that attaches lateral epicondyle to radial notch of ulna and annular ligament

Question 11

A: Describe the [Proximal Radio-ulnar joint]

B: Name and Describe the ligament it houses? [3]

Answer 11

A: Uniaxial synovial pivot joint

B: ANNULAR LIGAMENT=

1. surrounds radial head & ulna radial notch
2. Keeps radius head in notch
3. Enables pronation & supination

Question 12

Interosseous Membrane [2]

Answer 12

syndesmosis fibrous joint that unites radius & ulna AND divides forearm into ANT/POST compartments

Question 13

A: Describe the [ Distal Radio-ulnar Joint ]
B: Describe its Joint Capsule [3]

C: Name and Describe the ligament it houses? [2]

Answer 13

B:
1.extends from ulnar head around ulnar notch of radius
2. Allows pronation & supination
3. thin superiorly
——————————————————————————–
C: PALMAR & DORSAL RADIOULNAR LIGAMENTS: extend transversely between radius & ulna; and the articular disc binds bones together

Question 14

A: Describe the [ Radiocarpal joint ]

B: Describe its Joint Capsule [2]

C: Name and Describe the 3 ligaments it houses?

D: What is the PRIMARY function of all 3 ligaments?

Answer 14

B:
1. extends from radius to [scaphoid, lunate & triquetrum]

2. ## provides minimal support but enables EFAa (flexion, extension, ABduction, aDDuction) & wrist circumductionC: [Dorsal Radiocarpal] = weak ligament
   [Volar Palmar Radiocarpal] = strong & stabilizing
   [Radial collateral ] = helps stabilize carpal proximal row

D: CONNECTS RADIUS TO
[SCAPHOID,LUNATE & TRIQUETRUM]

Question 15

Ulnar-carpal Joint [2]

Answer 15

1. extends from Ulna Styloid process to medial side of dorsal triquetral, pisiform & palmar flexor retinaculum
2. Articular disc covers Ulna distal end

Question 16

Intercarpal Joints

2) These bones are joined by which ligaments?

Answer 16

synovial plane joints that enable gliding and sliding movements

2) Intercarpal Joints are joined by ANT, POST & interosseous ligaments

Question 17

Carpometacarpal Joints

2. Which ligament is the strongest?

Answer 17

plane, synovial joints (EXCEPT THUMB) that allows movements

2. DORSAL LIGAMENT

Question 18

Trapeziometacarpal joint “TMC”

Answer 18

Biaxial, saddle joint that allows EFAa (Extension, Flexion, ADDuction, aBduction) & [Thumb circumduction/opposition]

Question 19

Metacarpophalangeal Joint

Answer 19

Biaxial, condyloid synovial joint that allows EFAa & [individual finger circumduction]

EFAa=Extension, Flexion, ADDuction, aBduction

Question 20

Interphalangeal Joint

2) How are medial & lateral COLLATERALS related to these joints?
3) How are PALMAR LIGAMENTS related to these joints?

Answer 20

uniaxial, synovial joint that allows FLEXION & EXTENSION ONLY

2) m/L COLLATERALS obliquely prevent side-to-side abduction & Adduction movements
3) PALMAR LIGAMENTS prevent hyperextension

Question 21

How do the 4 Rotator Cuff Muscles (____) attribute to the Shoulder Joint

Answer 21

[SitS] Rotator Cuff muscles help stabilize the shallow shoulder joint articulation w/out inhibiting the extensive shoulder ROM