Anatomy

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    • Deltoid
    • Origin: lateral 1/3 of clavicle, acromion, and spine of scapula
    • Insertion: deltoid tuberosity of humerus
    • Action:
    •      Anterior: flexes and medially rotates humerus
    •      Middle: abduction
    •      Posterior: Extends and laterally rotates humerus
    • Nerve: axillary nerve
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    • Serratus Anterior
    • Origin: external surfaces of the lateral parts of the 1st-8th ribs
    • Insertion: anterior surface of the medial border of the scapula
    • Action: scapula protraction, holds scapula to thoracic wall, rotation of scapula
    • Nerve: long thoracic nerve
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    • Pectoralis Minor
    • Origin: medial superior coracoid process
    • Insertion: 3rd-5th ribs hear the costal cartilage
    • Action: draws scapula inferior and anterior
    • Nerve: medial pectoral nerve
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    • Pectoralis Major
    • Origin:
    •     Clavicular: anterior medial 1/2 of clavcle
    •     Sternal: anterior sternum and superior 6 costocartilages, aponeurosis of exeternal oblique
    • Insertion: lateral lip of the intertubercular groove of humerus
    • Action: adducts and medially rotates humerus. Flexes humerus.
    • Nerve: medial and lateral pectoral nerves
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    • Levator Scapulae
    • Origin: poseterior tubercles of transverse processes of c1-c4
    • Insertion: medial superior border of scapula
    • Action: elevates scapula and rotates glenoid inferiorly
    • Nerve: dorsal scapular nerve
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    • Rhomboid Minor
    • Origin: spinous processes of c7-T1
    • Insertion: medial border of scapula
    • Action: retracts scapula, rotates scapula to depress glenoid, scapula fixator
    • Nerve: dorsal scapular nerve
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    • Rhomboid Major
    • Origin: spinous processes of T2-T5
    • Insertion: Medial border of scapula
    • Action: retracts scapula, rotates scapula to depress glenoid, scapula fixator
    • Nerve: dorsal scapular nerve
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    • Latissimus Dorsi
    • Origin: spinous processes of inferior 6 T vertebrae, thoracolumbar fascia, illiac crest, inferior 3rd and 4th ribs
    • Insertion: Floor of intertubercular groove of humerus
    • Action: extedns adducts and medially rotates humerus
    • Nerve: thoracolumbar nerve
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    • Trapezius
    • Origin: Medial 1/3 of superior nuchal line, external occipital protuberance, nuchal ligament, spinous processes of c7-T12
    • Insertion: lateral 1/3 of scapula, acromion, and spine of scapula
    • Action: scapula elevation, depression, and retraction
    • Nerve: spinal accessory nerve
Author
Jwannn
ID
234064
Card Set
Anatomy
Description
Muscles 30-38 for the 1st Muscle Quiz
Updated