Anatomy Lecture 2: Shoulder

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  1. 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
  2. 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
  3. 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
  4. 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.
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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.
  11. 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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Author:
Anonymous
ID:
98131
Filename:
Anatomy Lecture 2: Shoulder
Updated:
2011-08-23 23:45:55
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Anatomy
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Anatomy Lecture 2: Shoulder
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