Deep Back muscles

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splenius capitis Origin: ligamentum nuchae and spines of c7-t3 or t4 vertebrae
Splenius capitis Action: alone: laterally bends and rotates head to active side
together: extend head & neck
Splenius capitis Innervation: dorsal rami of spinal nerves
Splenius capitis Insertion: mastoid process and lateral 1/3 of the superior nuchal line
splenius cervicis Origin: ligamentum nuchae and spines of c7-t3 or t4 vertebrae
splenius cervicis Innervation: dorsal rami of spinal nerves
splenius cervicis Action: alone: laterally bends and rotates head to active side
together: extend head & neck
splenius cervicis Insertion: tubercles of the transverse processes of c1-c3 or c4 vertebrae
serratus posterior superior Origin: ligamentum nuchae, spines of c7 to t3
serratus posterior superior Insertion: superior borders of ribs 2-4
serratus posterior superior Action: elevates the upper ribs
serratus posterior superior Innervation: 2nd to 5th intercostal nerves
serratus posterior inferior Origin: spines of t 11 to l2
serratus posterior inferior Insertion: inferior borders of ribs 8-12 near their angles
serratus posterior inferior Innervation: anterior (ventral) rami of T9-T12 thoracic spinal nerves
serratus posterior inferior Action: Depresses lower ribs
iliocostalis Origin: broad tendon from posterior iliac crest, sacrum, sacral and inferior lumbar spinous processes, and supraspinous ligament (iliac crest and sacrum
iliocostalis Insertion: lumborum, throacis, and cervicis: angles of the ribs and cervical transverse processes
iliocostalis Action: bilaterally: extends vertebral column and neck
unilaterally: and laterally bends vertebral column
iliocostalis Innervation: dorsal rami of spinal nerves
longissimus Origin: broad tendon from posterior iliac crest, sacrum, sacral and inferior lumbar spinous processes, and supraspinous ligament (transverse process at inferior vertebral levels)
longissimus Insertion: thoracis, cervicis, and capitis: transverse processes in thoracic and cervical regions and mastoid process
longissimus Action: bilaterally: extends vertebral column and neck
unilaterally: and laterally bends vertebral column
longissimus Innervation: dorsal rami of spinal nerves
spinalis Origin: broad tendon from posterior iliac crest, sacrum, sacral and inferior lumbar spinous processes, and supraspinous ligament (spinous processes at inferior vertebral levels)
spinalis Insertion: thoracis, cervicis, and capitis: spinous processes of upper thoracic region, occipital bone, and base of the skull
spinalis Innervation: dorsal rami of spinal nerves
spinalis Action: bilaterally: extends vertebral column and neck
unilaterally: and laterally bends vertebral column
semispinalis Origin: transverse processes of c4-t12
semispinalis Action: extends head and thoracic and cervical regions of vertebral column and rotates them contralaterally
semispinalis Innervation: dorsal rami of spinal nerves
semispinalis Insertion: thoracis, cervicis, and capitis: occipital bone and spinous processes in thoracic and cervical regions
multifidus Origin: sacrum, ilium, transverse processes of t1-t3, articular processes of c4-c7
multifidus Insertion: spinous processes 2-4 vertebral levels superior to their origin
multifidus Action: stabilizes vertebrae during local movements of vertebral column
multifidus Innervation: dorsal rami of spinal nerves
Rotatores Origin: transverse processes (best developed in thoracic region)
Rotatores Insertion: junction of lamina and transverse process or spinous process of vertebrae above their origin (spanning 1-2 segments)
Rotatores Action: stabilize vertebrae and assist w/ local extension and rotary movements of vertebral column (may function in proprioception)
rotatores Innervation: dorsal rami of spinal nerves
interspinales Origin: superior surfaces of cervical and lumbar spinous processes
interspinales Insertion: inferior surface of spinous process above
interspinales Innervation: dorsal rami of spinal nerves
interspinales Action: aids in extension and rotation of vertebral column
intertransversarii Origin: transverse processes of cervical and lumbar vertebrae
intertransversarii Insertion: transverse processes of adjacent vertebrae
intertransversarii Action: aid in lateral bending of vertebral column
bilaterally: stabilize vertebral column
intertransversarii Innervation: dorsal and VENTRAL rami of spinal nerves
levatores costarum Origin: tips of transverse processes of c7-t11
levatores costarum Insertion: between tubercle and angle of rib below its origin
levatores costarum Innervation: dorsal rami of spinal nerves c8-t11
levatores costarum Action: elevates the ribs, assist with inspiration and lateral bending of vertebral column
Internal intercostals Origin: Inferior border of ribs
Internal intercostals Insertion: Superior border of ribs below
Internal intercostals Innervation: Intercostal nerve
Internal intercostals Action: Depresses Ribs
Innermost Intercostals Origin: Inferior border of ribs
Innermost Intercostals Insertion: Superior border of ribs below
Innermost Intercostals Innervation: Intercostal Nerve
Innermost Intercostals Action: (probably) Elevates ribs
Subcostals Origin: Internal surface of lower ribs near their angles
Subcostals Insertion: Superior borders of 2nd or 3rd ribs below
Subcostals Innervation: Intercostal nerve
Subcostals Action: Elevates ribs
Transversus Thoracis origin: Posterior surface of lower sternum
Transversus Thoracis Insertion: Internal surface of costal cartiliges 2-6
Transversus Thoracis Innervation: Intercostal Nerve
Transversus Thoracis Action: Depresses ribs
External Oblique Origin: External Surfaces of 5th-12th ribs
External Oblique Insertion: Linea Alba, pubic tubercle, and anterior half of iliac crest
External Oblique Innervation: Inferior six thoracic nerves and subcostal nerves
External Oblique Action: Compress and support abdominal viscera, flex and rotate trunk
Internal Oblique Origin: Thoracolumbar fascia, anterior 2/3 of iliac crest, and lateral 1/2 of inguinal ligament
Internal Oblique Insertion: Inferior borders of 10th-12th ribs, linea alba, and pectin pubis via the conjoint liagment
Internal Oblique Innervation: Ventral rami of inferior 6 thoracic nerves and first lumbar nerves
Internal Oblique Action: Compress and support abdomnial viscera, flex and rotate the trunk
Transverse Abdominis Origin: Internal surfaces of 7th-12th costal cartilages, thoracolumbar facia, iliac crest, and lateral 1/3 of inguinal ligament
Transverse Abdominis Insertion: Linea alba with aponeruosis of internal oblique, pubic crest and pectin pubis via the conjoint ligament
Transverse Abdominis Innervation: Ventral rami of inferior 6 thoracic nerves and first lumbar nerves
Transverse Abdominis Action: Compress and support abdominal viscera
Rectus Abdominis Origin: Pubic symphysis and pubic crest
Rectus Abdominis Insertion: Xiphoid process and 5th-7th costal cartilages
Rectus Abdominis Innervation: Ventral rami of inferior 6 thoracic nerves
Rectus Abdominis Action: Flexes trunk and compresses abdominal viscera

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Number of cards 84