Superficial Back Muscles Division Origin Insertion Function

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Content • 0:00 Introduction • 0:09 Division of the Superficial Muscles • 0:43 Trapezius • 2:04 Latissimus Dorsi • 2:55 Rhomboid Major • 3:13 Rhomboid Minor • 3:33 Levator Scapulae • 3:58 Serratus Posterior Superior • 4:20 Serratus Posterior Inferior • ---------------------------------------------- • 🫀Join: / @taimtalksmed • 📷 Follow my IG: / taimtalksmed • ----------------------------------------------- • • Superficial Muscles of the Back • Muscles of the 1st Layer • ○ Trapezius • ○ Latissimus dorsi • Muscles of the 2nd Layer • ○ Rhomboid Major • ○ Rhomboid Minor • ○ Levator Scapulae • Muscles of the 3rd Layer • ○ Serratus Posterior Superior • ○ Serratus Posterior Inferior • • Trapezius • musculus trapezius • Superior Part • Origin: • Superior Nuchal Line • External Occipital Protuberance • Nuchal Ligament • Insertion: • Acromial end of clavicle • Acromium of Scapula • Middle Part • ○ Origin: Spinous Process of C7-T3/T4 • ○ Insertion: Spine and Acromium of Scapula • Inferior Part • ○ Origin: Spinous Process of T4-T12 • ○ Insertion: Spine of Scapula • • Latissimus dorsi • Musculus latissimus dorsi • Origin: • Spinous Process of T7-T12 • Thoracolumbar Fascia • Iliac Crest • Inferior surface of ribs 9-12 • Inferior angle of Scapula • Insertion: Crest of Lesser Tubercle (Humerus) • Crista tuberculi minoris humeri • Rhomboid Major • musculus rhomboideus major • Origin: Spinous Process of T1-T4 • Insertion: Lower 2/3 of Medial Border of Scapula • margo medialis scapulae • Function: • Elevates and retracts the scapula • Internal rotation of the scapula • • Rhomboid Minor • musculus rhomboideus minor • Origin: Spinous Process of C6-C7 • Insertion: Upper 1/3 of Medial Border of Scapula • margo medialis scapulae • Function: • Elevates and retracts the scapula • Internal rotation of the scapula • Levator Scapulae • musculus levator scapulae • Origin: Spinous Process of C1-C4 • Insertion: Superior Angle of Scapula • angulus superior scapulae • Function: • Elevates the Scapula • • Serratus Posterior Superior • Musculus serratus posterior superior • Origin: Spinous Process of C6-T2 • Insertion: External Surface of 2nd-5th Ribs • Function: • Elevates the Ribs (Inspiration) • • Serratus Posterior Inferior • Musculus serratus posterior inferior • Origin: Spinous Process of T11-L2 • Insertion: External Surface of 9th-12th Ribs • Function: • Pulls the ribs downward (expiration)

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