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trapezius (superficial)
- o: spinous process C7-T12, nuchal ligament, external occipital protruberence, nuchal line
- i: clavicle, acromion and spine of scapula
- inn: spinal accessory nerve
- a: elevate ,depress scapula
-
latissimus dorsi (superficial)
- o: 3-4 ribs, thoracolumbar fascia, iliac crest
- i: intertubercular groove of humerus
- inn: thoracodorsal nerve
- a: extend, adduct, medially rotate humerus
-
levator scapula (deep)
- o: tranverse process C1-C4
- i: medial border scapula
- inn: dorsal scapular and cervical nerves
- a: elevate scapula
-
Rhomboids (deep)
- o: major: spinous process T2- T5
- minor: nuchal ligament and spinous process C7-T1
- i: major: medial border scapula from spine to inferior angle
- minor: scapular spine
- inn: dorsal scapular nerve
- a: retract scapula
-
deltoid (Intrinsic)
- o: clavicle, acromion and spine of scapula
- i: deltoid tuberosity
- inn: axillary nerve
- a: abducts arm, medially and laterally rotates arm
-
teres major
- o: posterior surface of scapula
- i: intertubercular groove of humerus
- inn: lower subscapular nerve
- a: adducta and medially rotates arm
-
what are the 4 rotator cuff muscles?
- supraspinatus
- infraspinatus
- subscapularis
- teres minor
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