Shoulder Complex I - Movements Flashcards
What muscle contributes to elevation of the scapula, and what is its innervation?
The upper fibers of the trapezius - spinal accessory nerve (CN XI)
What muscle helps contribute to protraction of the scapula, and what is its innervation?
The serratus anterior - Long thoracic nerve
What muscle contributes to retraction of the scapula, and what is it’s innervation?
The middle fibers of the trapizius - CN XI
What muscle contributes to upward rotation of the scapula, and what is its innervation?
The upper (and lower) fibers of the trapizius - CN XI
What muscle helps contribute to downward rotation of the scapula, and what is its innervation?
The latissimus dorsi - Thoracodorsal nerve.
What muscle contributes to extension of the Glenohumeral joint (arm movement), and what is its innervation?
The posterior deltoid - axillary nerve
What muscles contribute to flexion of the Glenohumeral joint (arm movement), and what are their innervations?
- Anterior deltoid (Axillary nerve)
- Clavicular head of pectoralis major (medial and lateral pectoral nerves)
What muscles contribute to adduction of the Glenohumeral joint (arm movement), and what are their innervations?
- Pectoralis major (medial and lateral pectoral nerves)
- Latissimus dorsi (Thoracodorsal nerve)
What muscles contribute to abduction of the Glenohumeral joint (arm movement), and what are their innervations?
- Supraspinatus [1st 15-20 degrees] (Suprascapular nerve)
- Lateral deltoid (axillary nerve)
What muscle contributes to lateral rotation of the Glenohumeral joint (arm movement), and what is its innervation?
The infraspinatus - Suprascapular nerve
What muscle contributes to medial rotation of the Glenohumeral joint (arm movement), and what is its innervation?
The subscapularis - Upper and lower subscapular nerve
