ANAT 1615 Superficial Back Muscles (Chart)

ANAT 1615 Superficial Back Muscles (Chart) - Muscles of the...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Muscles of the Back - Superficial Group Muscle Origin Insertion Action Innervation Artery Notes trapezius Occipital bone, nuchal ligament, SP of C7- T12 lateral third of the clavicle; acromion and spine of the scapula elevates and depresses the scapula, rotates the scapula superiorly; retracts scapula motor: spinal accessory (XI), proprioception: C3- C4 (sensory) transverse cervical artery named for its shape; trapezius is an example of a muscle that migrates during development from its level of origin (cervical) to its final position, pulling its nerve and artery along behind *hypomere* ventral rami latissimus dorsi Spinous processes of T7 to the sacrum, posterior third of the iliac crest, ribs 10-12, sometimes from the inferior angle of the floor of the intertubercular groove of humerus extends adducts and medially rotated humerus. Raises body during climbing thoracodorsal nerve (C6,7,8) from the posterior cord of the brachial plexus thoracodorsal artery latissimus dorsi tendon passes in close relationship to the teres major tendon at their insertions *2-3 segments *hypomere* ventral rami scapulae C1-C4 vertebrae the medial border of the scapula scapula (C5) and cervical nerves C3 & C4 dorsal scapular a. levator scapulae is named for its action *hypomere* rhomboideus major (below) Spinous proceses of vertebrae T2-T5 medial border of the scapula from level of spine to inferior angle. retracts, elevates and rotates the scapula which depresses the glenoid fossa dorsal scapular nerve (C4,C5) dorsal scapular a. named for its shape rhomboideus minor (above) inferior ligamentum nuchae, spinous process of C7- T1 medial border of the scapula at the root of the spine retracts, elevates and rotates the scapula which depresses the dorsal scapular nerve (C5) dorsal scapular a named for its shape Next Layer
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Muscles of the Back - Intermediate Group Muscle Origin Insertion Action Innervation Artery Notes serratus posterior superior ligamentum nuchae, spinous processes C7-T3 ribs 2-5, lateral to the angles elevates the upper ribs branches of the ventral primary rami of spinal nerves T2-T5 posterior intercostal aa. 1-4 a respiratory muscle, it receives ventral ramus innervation; embryonically related to the intercostal muscles, not the deep back mm. *hypomere* serratus posterior inferior thoracolumbar fascia, spinous processes T11-T12 and L1-L2 ribs 9-12 pulls down (depresses) lower ribs branches of the ventral primary rami of spinal nerves T9-T12 lowest posterior intercostal a., subcostal a., first two lumbar aa. a respiratory muscle, it receives ventral ramus innervation; embryonically related to the intercostal muscles, not the deep back mm. serratus anterior Ribs 8-9 Medial border of scapula Protracts and rotates scapula, keeps medial border and inferior angle of scapula opposite to thoracic wall.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/21/2011 for the course ANAT 1615 taught by Professor Samueldemons during the Fall '10 term at Life Chiropractic College West.

Page1 / 8

ANAT 1615 Superficial Back Muscles (Chart) - Muscles of the...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online