![]() Transverse process at inferior vertebral levels ![]() These are small and fairly insignificant muscles The most lateral part of the erector spinae it may be subdivided into lumborum,ĭorsal primary rami of spinal nerves C1-L5 Of these columns has multiple named partsĮxtends and laterally bends the trunk and neckĭorsal primary rami of spinal nerves C4-S5 Laterally, longissimus in an intermediate position and spinalis medially each is separated into 3 columns of muscle: iliocostalis Supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal ![]() Segmentally innervated by dorsal primary rami of spinal nerves C1-S5 Iliac crest, sacrum, transverse and spinous processes of vertebrae and supraspinalĪngles of the ribs, transverse and spinous processes of vertebrae, posteriorĮxtends and laterally bends the trunk, neck and head Univ of Michigan - Gross Anatomy - Muscles Tablesīack to menu Muscles of the Back Region - Listed Alphabetically ![]()
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