Anatomy Lecture 2: Shoulder

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What is the innervation of the trapezius?
What is the action of the trapezius?
- Innervation: CN XI, C3, C4
- Action: Elevate and depress scapula; retract scapula; superior rotation of scapula
What is the innervation of the latisimus dorsi?
What is the action of the latisimus dorsi?
- Innervation: C6-C8 (thoracodorsal)
- Action: Extension of arm; adduction of arm; medial roation of arm; raise body towards arms
What is the innervation of the levatator scapulae?What is the action of the levatator scapulae?
- Innervation: C3 and C4
- Action: Elevate scapula; inferior rotation of scapula
What is the innervation of the rhomboids? What is the action of the rhomboids?
- Innervation: dorsal scapular
- Action: Retract scapula; inferior rotation of scapula; fix scapula to thoracic wall.
What is the innervation of the serratus anterior? What is the action of the serratus anterior?
- Innervation: long thoracic
- Action: Protects scapula; rotation of scapula; fixes scapula to thoracic wall
What is the innervation of the deltoid? What is the action of the deltoid?
- Innervation: axillary nerve
- Action: Flexes arm; medially rotates arm; abducts arm; extends arm; laterally rotates arm
What is the innervation of the teres major? What is the action of the teres major?
- Innervation: lower subscapular nerve
- Action: Abducts arm; Medially rotates arm
What is the innervation of the subscapularis? What is the action of the subscapularis?
- Innervation: Upper & lower subscapular nerve
- Action: Medially rotates arm; holds humerus in place
What is the innervation of the supraspinatus? What is the action of the supraspinatus?
- Innervation: Suprascapular nerve
- Action: Aids in abduction of arm; holds humerus in place
What is the innervation of the infraspinatus? What is the action of the infraspinatus?
- Innervation: subscapular nerve
- Action: Laterally rotates arm; holds humerus in place.
What is the innervation of the teres minor? What is the action of the teres minor?
- Innervation: axillary nerve
- Actions: Laterally rotates arm; holds humerus in place

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Anatomy Lecture 2: Shoulder

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Anatomy Lecture 2: Shoulder

Updated

2011-08-23T23:45:55Z

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