Arthrology: Glenohumeral joint

Question 1

GH Joint type

Answer 1

Ball and socket, multiaxial

Largest ROM and movement in body

Limited ligamentous support

Question 2

Extension arthrokinematics

Answer 2

inferior roll, superior glide

Question 3

Flexion arthrokinematics

Answer 3

superior roll, inferior glide

Question 4

Abduction arthrokinematics

Answer 4

superior roll, inferior glide

Question 5

Adduction arthrokinematics

Answer 5

inferior roll, superior glide

Question 6

External rotation arthrokinematics

Answer 6

posterior roll, anterior glide

Question 7

Internal rotation arthrokinematics

Answer 7

Anterior roll, posterior glide

Question 8

Open packed position

Answer 8

55 deg ABD, 30 deg horiz ADD

Question 9

Close packed position

Answer 9

End range ABD and ER

Question 10

Static stabilizers

Answer 10

Labrum
Joint capsule
- ant/inf portions most thick
GH ligaments
Inferior GH ligament complex

Question 11

Dynamic stabilizers

Answer 11

Rotator cuff
Deltoid
- large stabilizer in all positions

Question 12

Innervation

Answer 12

Axillary n.
Suprascapular n.
Lateral pectoral n.

Question 13

Subacromial “impingement”

Answer 13

Repeated compression of RCT, long head of biceps, subacromial bursa

Causes:
- RCT dysfunction
- scapular positioning
- shape of acromion
- GH joint hypo/hypermobility

Question 14

Tendonitis

Answer 14

Tendons intimate with capsule
Rarely isolated to one tendon