Medical Definition of Dorsal primary ramus of spinal nerve

1. The smaller, posteriorly-directed major terminal branch (with the ventral primary ramus) of all 31 pairs of mixed spinal nerves, formed at the intervertebral foramen and turning abruptly posteriorly to divide into lateral and medial branches, both of which will supply the deep (true) muscles of the back. The medial branch (rami medialis ) of the dorsal primary ramus also supplies articular branches to the zygopophyseal joints and the periosteum of the vertebral arch. In the neck and upper back, the medial branch continues through the deep and superficial back muscles to supply overlying skin; in the lower back, the lateral branch does this. Nomina Anatomica lists dorsal primary rami as "rami dorsales" for each group of spinal nerves: 1) cervical (nervorum cervicalium ), 2) thoracic (nervorum thoracicorum ), 3) lumbar (nervorum lumbalium ), 4) sacral (nervorum sacralium ), and 5) coccygeal (nervi coccygei ). Synonym: ramus dorsalis nervorum spinalium, ramus dorsalis, rami posteriores nervorum spinalium, dorsal branch, posterior primary division. (05 Mar 2000)



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Lexicographical Neighbors of Dorsal Primary Ramus Of Spinal Nerve

dorsal motor nucleus of vagus
dorsal muscles
dorsal nasal artery
dorsal nerve of scapula
dorsal nerves of toes
dorsal nucleus
dorsal nucleus of trapezoid body
dorsal nucleus of vagus
dorsal nucleus of vagus nerve
dorsal pancreatic artery
dorsal part of pons
dorsal plate of neural tube
dorsal position
dorsal primary ramus of spinal nerve (current term)
dorsal radiocarpal ligament
dorsal reflex
dorsal root
dorsal root ganglion
dorsal sacrococcygeal muscle
dorsal sacrococcygeus muscle
dorsal sacroiliac ligaments
dorsal scapular artery
dorsal scapular nerve
dorsal scapular vein
dorsal spine
dorsal surface
dorsal surface of digit
dorsal surface of sacrum

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