Art.humeri & its muscles

Question 1

Art. humeri

Answer 1

Shoulder joint;

articulation btw glenoidal cavity (scapula) - head of humerus

Question 2

Explain the joint (type and other features)

Answer 2

• Its a synovial (diathrosis) joint.
• Its art. spheroidale, multiaxial and incongruent (labrum glenoidale). Its joint capsule has a recessus cran et caud.

Movement: (ru/eq) flexion/extension

Ca: rotation, adduction. abduction also possible

Question 3

Ligaments of shoulder joint

Answer 3

No collateral (muscles instead) =m. infraspinati (lat) and m.subscalpularis (med)

ligg. glenohumeralis (gelnoid cavity- tuberculum majus et minus) - two parts on medial side.
ligg. transversum humeri (fixes the biceps brachii tendon in the intertub. groove)

(Un) ligg.coracohumeri (tub.supraglenoidale - tuberculum majus et minus)

Question 4

Under the tendon of m.biceps brachii there is a …. in (Eq)

Answer 4

Bursa bicipitalis / bursa intertubercularis

Question 5

Labrum genoidale

Answer 5

Fibrocartilage “disc”

Question 6

The tendo of m. biceps brachii is partyl surrounded by the capsule of the joint, forming a sheet?

Answer 6

Vagina synovialis intertubercularis

Question 7

Extensors of shoulder joint

Answer 7

m. supraspinatus
m. biceps brachii
m. coracobrachialis
m. subscalpularis

Question 8

Flexors of shoulder

Answer 8

m. infraspinati
m. teres major
m. teres minor
m. deltoideus
m. triceps brachii (caput longum)
m. subscalpularis