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Back Muscles
| Question | Answer |
|---|---|
| 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? |