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Back Muscles Anatomy: Origins, Insertions and Actions

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Back Muscles Anatomy

Interspinous:

O: a. espinosus. I: a. espinosus, v. superior. IN: n. raquídeo, dorsal branch, runs. ACC: flexion, extension, cord and columns.

Sacrococcygeus

O: v. coccyx, bottom. I: dorsal v. coccygeal. IN: ulnar n. sacral and 1 coccygeal, r. + dorsoventral. ACC: ventral put his tail between his tail, levan y dorsal p.n.

Recto Kbza Dor

Retail:

  • O: tubercle, posterior atlas, dorsal arch.
  • I: inferior part, western, intercurved line.
  • IN: 1 dorsal cervical branch.
  • ACC: extension, cabza.

Recto Kbza Dor (Axis)

Retail:

  • O: a. espinoso, axis.
  • I: external part, inferior, western, curved line.
  • IN: dorsal branch 1 y2, cervical.
  • ACC: ipsilateral KBZA broken, extension KBZA.

Oblique KBZA:

O: a. espinoso axis. I: atlas, costal processes. IN: dorsal 2º cervical branch. ACC: ipsilateral KBZA broken, extension KBZA.

Rotated:

O: short / long a. transverso v. dorsal. I: short a. espinoso, v. superior, long a. espinoso, 2 v. xifoidea. IN: n. dorsal pole branch. ACC: broken against columns, extended columns.

Multifidus

  • O: r. sacral: sacral crest, lumbosacral aponeurosis. r. lumbar: a. costiform and tubercle. r. dorsal: a. transverso. r. cervical: pro 4 multi v. cervical costal.
  • I: a. espinoso of 2 a9 v. xifoidea.
  • IN: n. espinoso, posterior branch, runs.
  • ACC: contralateral broken, extended trunk.
  • Relations: clogged, clogged, xsemiespinoso.

Semiespinoso

Sonidos rotated

  • s. del akbza: O: a. transverso C7-D7, a. articulated C4-C6, a. espinoso C7, sometimes D1. I: between western.
  • s. dorsal curved lines: O: vertex and edge, superior, superior. D6-D10. I: xtndones round a. espinoso D1-D4 y C6-C7.
  • s. de neck: O: vertex superior 6 prime v. dorsal. I: a. espinoso C2-C5. IN: ra + run back and cervical n. raquídeo. ACC: broken contralateral KBZA y cuello, extension KBZA and neck.

Epiespinoso

  • I: f. dorsolumbar: O: a. espinoso D10-L3. I: a. espinoso D2-D6.
  • f. cervical: O: a. espinoso C6-D2. IN: a. espinoso C2-C4.
  • ACC: extension y dorsal cervical column.

Iliocostal

  • Lumbar: O: sacrum, iliac crest, external part, apo lumbocostal. I: angulus costae 6 a 12, costiform L1 y L2, apo lumbocostal.
  • Dorsal: O: dorsal angulus 6 a 12 costae. I: 6 prime costae.
  • Cervical: O: angulus dorsal 6 prime costae. I: C4-C6 costal processes. IN: C8-L1.
  • ACC: dorsal branches: ipsilateral tilted columns, columns extension.

Back Length:

  • Toracolumbar: O: sacrum, iliac crest, a. espinoso v. lumbar, a. transverso last v. dorsal, middle apo lumbocostal. I: costiform apo L1-L5, apo transverso v. dorsal, dorsal angulus ribs 2-12, apo lumbocostal.
  • Cervical: O: apo transverso 6 prime v. dorsal. I: C2-C5 costal processes.
  • De KBZA: O: a. transverso D1-D3, processes and costal a. articular C4-C7. I: apo mastoideo temporal.
  • IN: branches dorsal L1-L5.
  • ACC: ipsilateral tilts and rotates and tilts columns ipsilateral KBZA, extension KBZA and columns.
  • REAL: covers epiespinoso, semiespinoso, multifidus, intertransversarii, intercostal external, supracostal, lumbar block, and is cubital x serratus dorsal, dorsal angular, romboides, levator scapulae, trapezius and splenius.

Splenius:

  • Neck: O: a. espinoso D3-D6. I: C1-C2 pro.
  • De KBZA costal: O: apo espinoso C3-D3. I: apo mastoideo temporal, external part superior western curved line. IN: RA + C1-C6 dorsal.
  • ACC: ipsilateral KBZA flexion and rotation, cervical column, extension bilateral KBZA and cervical column.

Intertransversarii Dorsal:

  • Inter-lumbar: O: 1 v. lumbar, tubercle. I: v. superior, tubercle.
  • External lumbar: O: apo costiform. I: apo costiform.
  • Superior-dorsal: O: apo transverse. I: cervical apo transverse v. superior.
  • Previous amount: O: ventral processes tubercle costal. I: ventral tubercle.
  • Pro-cervical posterior: v. superior costal. O: dorsal tubercle costal processes. I: dorsal tubercle pro v. superior costal.
  • IN: C5-L1 dorsal branches except external lumbar, previous amount and cervical, qloson x ra +, ventral and lumbar spine.
  • ACC: flexion ipsilateral columns.
  • REAL: origin to cover in its rotated, and are multifidus cubital x semispinalis longissimus.

Dorsal Oblique KBZA Retail

  • O: atlas, costal processes.
  • I: x over the straight dorsal KBZA, more curved line above x western inferior.
  • IN: cervical 1.
  • ACC: rotates the opposite hand, extension KBZA.

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