Muscles and nerves Pt1
Terms
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- Deltoid
- Anterior fibers- flexes, medially rotates; Middle fibers- abducts arm starting from about 15 degrees from vertical; Posterior fibers- extends, laterally rotates Axillary n.
- Supraspinatus
- Initiates abduction up to 15 degrees (deltoid kicks in) Suprascapular n.
- Infraspinatus
- Lateral rotation Suprascapular n.
- Subscapularis
- Adducts and medially rotates Upper and lower subscapular n.
- Teres Major
- Adducts and medially rotates Lower subscapular n.
- Teres Minor*
- Lateral rotation Axillary n.
- Latissimus dorsi
- Adducts, extends, and medially rotates Thoracodorsal n.
- Pectoralis Major
- Adducts and medially rotates and flexes Lateral and medial pectoral n.
- Quadrangular Space
- 1.Axillary nerve and posterior circumflex humeral artery 2.Bounded by: teres minor superiorly,teres major inferiorly,long head of triceps medially,surgical neck of humerus laterally
- Triangular Interval
- 1.Radial nerve and profunda brachii artery 2.Bounded by: teres major superiorly,long head of triceps medially, medial head of triceps laterally