Medial Intertransversarii Lumbora

Authors

Affiliations

Nate 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

Muscle	Origin	Insertion	Innervation	Action
Medial intertransversarii lumbora	L1-L5 Mammillary process of superior segment	L1-L5 Mammillary process of inferior segment	Spinal nn. (posterior rami)	Bilateral: Cervical extension and stabilization, lumbar extension and stabilization Unilateral: Cervical extension and ipsilateral sidebend, Lumbar extension and ipsilateral sidebend

Origin

L1-L5: Mammillary process of inferiorly adjacent vertebrae¹

Insertion

C2-C7: Mammillary process of superiorly adjacent vertebrae¹

Innervation

Spinal nn. (Posterior Rami)¹

Action

• BIL: Stabilizes and extends cervical and lumbar vertebrae¹
• UNIL: I/L SB cervical and lumbar spines¹

References

1.

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