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Back Muscles

Where is Triangle of Auscultation located? Upper border of latissimus dorsi, lateral border of trapezius, medial border of scapula Floor is formed by rhomboid major
Where is the lumbar triangle located? Formed by the iliac crest, latissimus dorsi, and external oblique abdominal muscle Floor is formed by internal oblique abdominal muscle
Where is the Occipital Artery? Arises from carotid artery, runs deep to the SCM, lies on obliquus capitis superior and semispinalis capitis
What does the Occipital Artery do? Pierces the trapezius, is accompanied by the greater occipital nerve and supplies the scalp in the occipital region
What are the superficial muscles of the back? Trapezius, levator scapulae, rhomboid minor, rhomboid major, latissimus dorsi, serratus posterior superior, serratus posterior inferior
Origin of Trapezius? occipital bone, nuchal line, SP of C7-T12
insertion of trapezius? Lat 1/3 of clavicle, acromion & spine of scapula
Action of trapezius? Elevates, retracts, depresses and rotates scapula
Innervation of trapezius? Spinal Accessory n. (C3-C4)
Origin of latissimus dorsi? SP of T& to sacrum, thoracolumbar fascia, iliac crest, ribs 10-12
Insertion of latissimus dorsi? Intertubercular groove of humerus
Action of latissumus dorsi?
Created by: 1626645280