Intermediate Branch of Posterior Ramus of Fourth Lumbar Nerve (Left)
Ramus posterior intermedius nervi lumbalis quarti
Read moreQuick Facts
Origin: Posterior ramus of the fourth lumbar nerve (L4).
Course: Continues dorsally and caudally.
Branches: None.
Supply: Lumbar fibers of longissimus thoracis muscle.
Related parts of the anatomy
Origin
After the posterior ramus of the fourth lumbar nerve (L4) has traversed through the intertransverse ligament and medial intertransverse muscle, it divides into medial, intermediate, and lateral branches.
Course
The intermediate branch passes dorsally and caudally through the intertransverse space and enters the longissimus thoracis muscle. It remains intermuscular (Bogduk, Wilson and Tynan, 1982).
Branches
There are no named branches.
Supplied Structures & Function
The intermediate branch supplies the lumbar fibers of longissimus thoracis muscle.
References
Bogduk, N., Wilson, A. S. and Tynan, W. (1982) 'The human lumbar dorsal rami', J Anat, 134(Pt 2), pp. 383-97.
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