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ANAT - Shoulder Musc
Shoulder - Innervation/Action
| Question | Answer |
|---|---|
| Trapezius - Innervation | Accessory and Cervical plexus |
| Latissimus Dorsi - Innervation | Thoracodorsal |
| Levator Scapulae - Innervation | Dorsal Scapular |
| Rhomboids major and minor - Innervation | Dorsal scapular |
| Serratus anterior - Innervation | Long thoracic |
| Deltoid - Innervation | Axillary |
| Teres major - Innervation | Lower subscapular |
| Teres minor - Innervation | Axillary |
| Infraspinatus - Innervation | Suprascapular |
| Supraspinatus - Innervation | Suprascapular |
| Subscapularis - Innervation | Upper/lower subscapular |
| Trapezius - Action | Elevate/depress, retract, rotate scapula |
| Latissimus Dorsi - Action | Extends, adducts, medially rotates humerus (for chinups) |
| Levator scapulae - Action | Elevates scapula, rotates glenoid cavity downward |
| Rhomboids major/minor - Action | Retract/hold scapula in place, depress glenoid cavity |
| Serratus anterior - Action | Protracts/rotates/holds scapula in place |
| Deltoid - Action | Anterior - flexes/medially rotates arm, Middle - abducts arm, Posterior - extends, laterally rotates arm |
| Teres major - Action | Adducts/medially rotates arm |
| Teres minor - Action | Laterally rotates arm, holds humerus and glenoid fossa together |
| Infraspinatus - Action | Laterally rotates arm, holds humerus and glenoid fossa together |
| Supraspinatus - Action | Abducts arm, holds humerus and glenoid fossa together |
| Subscapularis - Action | Medially rotates arm, adducts arm, holds humerus and glenoid fossa together |
| Quadrangular Space contents | Axillary nerve and Posterior humeral circumflex artery |
| Triangular Space contents | Circumflex Scapular artery |
| Triangular interval contents | Radial nerve and deep brachial artery |