Medical Definition of Dorsal branch

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)



Lexicographical Neighbors of Dorsal Branch

dorrhawk
dorrhawks
dorring
dorrite
dorrs
dors
dorsa
dorsabdominal
dorsad
dorsal
dorsal accessory olivary nucleus
dorsal artery of foot
dorsal artery of nose
dorsal branch (current term)
dorsal branch of the lumbar artery
dorsal branch of the posterior intercostal arteries 3-11
dorsal branch of the posterior intercostal veins 4-11
dorsal branch of the subcostal artery
dorsal branch of the superior intercostal artery
dorsal branch of the ulnar nerve
dorsal calcaneocuboid ligament
dorsal callosal vein
dorsal carpal branch of radial artery
dorsal carpal branch of ulnar artery
dorsal carpal ligament
dorsal carpal network
dorsal carpometacarpal ligaments
dorsal column of spinal cord

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