Iliocostalis

Authors
Affiliations

Doctor of Physical Therapy

B.S. in Kinesiology

Doctor of Physical Therapy

B.A. in Neuroscience

Figure 1: Muscles of the Neck and Back1
Reading list
  • Thoracolumbar paraspinal muscles2
  • Neuman3

Iliocostalis Cervicis

Origin

3rd-7th ribs4

Insertion

C4-C6 TP4

Innervation

Spinal nn. C8-L1 (Post rami, lateral branches)4

Action

Iliocostalis Thoracis

Origin

7-12th ribs4

Insertion

1st-6th ribs4

Innervation

Spinal nn. C8-L1 (Post rami, lateral branches)4

Action

Iliocostalis Lumborum

Origin

Sacrum, iliac crest, lumbar vertebrae SP; lower thoracic vertebrae TP4

Insertion

6-12th ribs, thoracolumbar fascia (posterior layer), upper lumbar vertebrae (TP)4

Innervation

Spinal nn. C8-L1 (Post rami, lateral branches)4

Action

  • Bilateral: Extends spine4
  • Unilateral: I/L spine lat-flexion4

Muscle groups

Iliocostalis is part of the Intermediate intrinsic back muscles (erector spinae)

Palpation

Clinical significance

1.
Betts JG, Blaker W. Anatomy and Physiology. 2nd ed. OpenStax; 2022. https://openstax.org/details/books/anatomy-and-physiology-2e/?Book%20details
2.
Donnelly JM, Simons DG, eds. Travell, Simons & Simons’ Myofascial Pain and Dysfunction: The Trigger Point Manual. Third edition. Wolters Kluwer Health; 2019.
3.
Neumann DA, Kelly ER, Kiefer CL, Martens K, Grosz CM. Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation. 3rd ed. Elsevier; 2017.
4.
Gilroy AM, MacPherson BR, Wikenheiser JC, Voll MM, Wesker K, Schünke M, eds. Atlas of Anatomy. 4th ed. Thieme; 2020.

Citation

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