Spinalis Muscle

Authors
Affiliations

Nathaniel Yomogida, B.S., SPT

Doctor of Physical Therapy

B.S. in Kinesiology

Chloë Kerstein, B.S., SPT

Doctor of Physical Therapy

B.A. in Neuroscience

OIAN

Schematic view of the intermediate intrinsic muscles of the back (Erector spinae)1

Schematic view of the intermediate intrinsic muscles of the back (Erector spinae)1

Intermediate intrinsic muscles of the back / Erector spinae (Posterior view)1

Intermediate intrinsic muscles of the back / Erector spinae (Posterior view)1
Table 1: Spinalis muscles
Muscle Origin Insertion Innervation Action

Spinalis Cervicis

Origin

C5-T2 (SP)1

Insertion

C2-C5 (SP)1

Innervation

Spinal nn. (Posterior Rami)1

Action

  • BIL: Extends C/S and T/S1
  • UNIL: I/L SB cervical and thoracic spine1

Spinalis Thoracis

Origin

T10-L3 (SP, lat surface)1

Insertion

T2-T8 (SP, lat surface)1

Innervation

Spinal nn. (Posterior Rami)1

Action

  • BIL: Extends C/S and T/S1
  • UNIL: I/L SB cervical and thoracic spine1

References

1.
Gilroy AM, MacPherson BR, Wikenheiser JC, Voll MM, Wesker K, Schünke M, eds. Atlas of Anatomy. 4th ed. Thieme; 2020.

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