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Back Muscles OIAIA

Back Muscles Origin, Insertion, Action, Innervation, Artery

QuestionAnswer
Erector spinae Origin iliac crest, sacrum, transverse and spinous processes of vertebrae and supraspinal ligament
Erector spinae Insertion angles of the ribs, transverse and spinous processes of vertebrae, posterior aspect of the skull
Erector spinae Action extends and laterally bends the trunk, neck and head
Erector spinae Innervation segmentally innervated by dorsal primary rami of spinal nerves C1-S5
Erector spinae Artery supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
Iliocostalis Origin iliac crest and sacrum
Iliocostalis Insertion angles of the ribs
Iliocostalis Action extends and laterally bends the trunk and neck
Iliocostalis Innervation dorsal primary rami of spinal nerves C4-S5
Iliocostalis Artery supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
Interspinales Origin upper border of spinous process
Interspinales Insertion lower border of spinous process above
Interspinales Action extend trunk and neck
Interspinales Innervation dorsal primary rami of spinal nerves C1-L5
Interspinales Artery supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
Intertransversarii Origin upper border of transverse process
Intertransversarii Insertion lower border of transverse process above
Intertransversarii Action laterally bend trunk and neck
Intertransversarii Innervation dorsal primary rami of spinal nerves C1-L5
Intertransversarii Artery supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
Longissimus Origin transverse process at inferior vertebral levels
Longissimus Insertion transverse process at superior vertebral levels and mastoid process
Longissimus Action extends and laterally bends the trunk, neck and head
Longissimus Innervation dorsal primary rami of spinal nerves C1-S1
Longissimus Artery supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
Multifidus Origin sacrum, transverse processes of C3-L5
Multifidus Insertion spinous processes 2-4 vertebral levels superior to their origin
Multifidus Action extend and laterally bend trunk and neck, rotate to opposite side
Multifidus Innervation dorsal primary rami of spinal nerves C1-L5
Multifidus Artery supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
Muscles of the Tranversospinal Group semispinalis, multifidus and rotators
Obliquus capitis inferior Origin spinous process of the axis
Obliquus capitis inferior Insertion transverse process of atlas
Obliquus capitis inferior Action rotates the head to the same side
Obliquus capitis inferior Innervation suboccipital nerve (DPR of C1)
Obliquus capitis inferior Artery occipital a.
Obliquus capitis superior Origin transverse process of atlas
Obliquus capitis superior Insertion occipital bone above inferior nuchal line
Obliquus capitis superiorAction extends the head, rotates the head to the same side
Obliquus capitis superior Innervation suboccipital nerve (DPR of C1)
Obliquus capitis superior Artery occipital a
Suboccipital Triangle is formed by? the suboccipital triangle is formed by obliquus capitis superior and inferior and rectus capitis posterior major
Rectus capitis posterior major Origin spinous process of axis
Rectus capitis posterior major Insertion inferior nuchal line
Rectus capitis posterior major Action extends the head, rotate to same side
Rectus capitis posterior major Innervation suboccipital nerve (DPR of C1)
Rectus capitis posterior major Artery occipital a
Rectus capitis posterior minor Origin posterior tubercle of atlas
Rectus capitis posterior minor Insertion inferior nuchal line medially
Rectus capitis posterior minor Action extends the head
Rectus capitis posterior minor Innervation suboccipital nerve (DPR of C1)
Rectus capitis posterior minor Artery occipital a.
What is the location relationship between the Rectus capitis muscles? rectus capitis posterior minor is deeper and inserts more medial than rectus capitis posterior major
Rotatores Origin transverse processes
Rotatores Insertion long rotatores: spines 2 vertebrae above origin; short rotatores: spines 1 vertebrae above origin
Rotatores Action rotates the vertebral column to the opposite side
Rotatores Innervation dorsal primary rami of spinal nerves C1-L5
Rotatores Artery supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
Semispinalis Origin transverse processes of C7-T12
Semispinalis Insertion capitis: back of skull between nuchal lines; cervicis & thoracis: spines 4-6 vertebrae above origin
Semispinalis Action extends the trunk and laterally bends the trunk, rotates the trunk to the opposite side
Semispinalis Innervation dorsal primary rami of spinal nerves C1-T12
Semispinalis Artery supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
Serratus posterior inferior Origin thoracolumbar fascia, spines of vertebrae T11-T12 and L1-L2
Serratus posterior inferior Insertion ribs 9-12, lateral to the angles
Serratus posterior inferior Action pulls down lower ribs
Serratus posterior inferior Innervation branches of the ventral primary rami of spinal nerves T9-T12
Serratus posterior inferior Artery lowest posterior intercostal a., subcostal a., first two lumbar aa.
Serratus posterior superior Origin ligamentum nuchae, spines of vertebrae C7 and T1-T3
Serratus posterior superior Insertion ribs 1-4, lateral to the angles
Serratus posterior superior Action elevates the upper ribs
Serratus posterior superior Innervation branches of the ventral primary rami of spinal nerves T1-T4
Serratus posterior superior Artery posterior intercostal aa. 1-4
Spinalis Origin spinous processes at inferior vertebral levels
Spinalis Insertion spinous processes at superior vertebral levels and base of the skull
Spinalis Action extends and laterally bends trunk and neck
Spinalis Innervation dorsal primary rami of spinal nerves C2-L3
Spinalis Artery supplied segmentally by: deep cervical a., posterior intercostal aa., subcostal aa., lumbar aa.
Splenius capitis Origin ligamentum nuchae and spines of C7-T6 vertebrae
Splenius capitis Insertion mastoid process and lateral end of the superior nuchal line
Splenius capitis Action extends and laterally bends the neck and head, rotates head to the same side
Splenius capitis Innervation dorsal primary rami of spinal nerves C2-C6
Splenius capitis Artery supplied segmentally by: deep cervical a., posterior intercostal aa.
Splenius cervicis Origin ligamentum nuchae and spines of C7-T6 vertebrae
Splenius cervicis Insertion posterior tubercles of the transverse processes of C1-C3 vertebrae
Splenius cervicis Action extends and laterally bends neck and head, rotates head to the same side
Splenius cervicis Innervation dorsal primary rami of spinal nerves C2-C6
Splenius cervicis Artery supplied segmentally by: deep cervical a., posterior intercostal aa.
Created by: ikosnac