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Anatomy Block-4 Muscles-Shoulder
AUC
14
Anatomy
Graduate
03/27/2011

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Cards

Term
Serratus Anterior
Definition
Innervation: Long thoracic nerve
Insertion: Medial border of scapula
Origin: Ribs
Action: Protracts scapula and keeps in place.

*winged scapula
Term
Trapezius
Definition
Spinal accessory nerve

Rotation, retraction, elevation, and depression of scapula
Term
Lat dorsi
Definition
adductor and extensor of the arm

thoracodorsal nerve
Term
Levator Scapulae
Definition
Dorsal Scapular n

elevate scapula.

Inserts on medial portion of scapula
Term
Rhomboids
Definition
Inervation: dorsal scapular nerve
Insertions: Lower portion of the medial border of the scapulla

actoin: retracts and rotates scapula to depress glenoid cavity.
Term
Rotator Cuff muscles: SITS
Definition
Supraspinatus
Infraspinatus
Teres Minor
sub scapularis
Term
Supraspinatus
Definition
Innervation: Supra Scapular n
Insertion:Greater tubercle and capsule of shoulder joint
Origin:
Action: Initiates abduction(15degrees)
Term
Infraspinatus
Definition
Innervation: Suprascapular N
Insertion: Greater tubercle
Origin:
Action: lateral rotates the arm
Term
Pec Major
Definition
Innervation: lateral and medial pectoral
Insertion: Crest of Greater tubercle
Origin: Sternum-Ribs
Action: Flexes adducts and roates arm medially
Term
Pec Minor
Definition
Innervation: Medial Pectoral
Insertion: Coracoid Process of Scapula
Origin: ribs
Action: Draws scapula forward, downard and rotates laterally
Term
Deltoid
Definition
Innervation: Axillary n
Insertion: Deltoid Tuberosity
Origin:
Action: Abduction, extension, flexion of shoulder
Term
Teres Minor
Definition
Innervation: Axillary N
Insertion: Greater tubercle of humerous
Origin:
Action: Laterally rotates the Arm and assists in adduction

Stabilizes shoulder joint, silver dollar pain
Term
Teres Major
Definition
Innervation: Lower subscapular
Insertion: medial lip of intertubercular sulcus
Origin:
Action: Medial rotation of humerus
Term
Subscapularis
Definition
Innervation: U/L subscapular nn
Insertion: lesser tuberosity
Origin:
Action: Medial rotates arm and adducts

Forms posterior wall of axilla
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