spinal branches

spinal branches

[TA]

branches of the following arteries and veins that supply and drain the meninges, the roots of the spinal nerves, and in some cases, the spinal cord: 1) vertebral, 2) ascending cervical, 3) dorsal branch of posterior intercostal I-XI, 4) dorsal branch of subcostal, 5) dorsal branch of lumbar arteries, 6) lumbar branch of iliolumbar, 7) lateral sacral; all spinal arteries give rise to arteries supplying dorsal and ventral roots of spinal nerves; most are exhausted in supplying the roots as radicular arteries, but some (4-9), are large enough to reach and anastomose with the anterior and posterior spinal arteries and are designated instead as segmental medullary arteries. See: great segmental medullary artery, segmental medullary arteries.

Synonym(s): rami spinales (1) [TA], spinal arteries

Farlex Partner Medical Dictionary © Farlex 2012

spi·nal branch·es

(spī'năl branch'ĕz) [TA]

Branches of the following arteries that supply the meninges, the roots of the spinal nerves, and in some cases the spinal cord: 1) vertebral, 2) ascending cervical, 3) dorsal branch of posterior intercostal I-XI, 4) dorsal branch of subcostal, 5) dorsal branch of lumbar arteries, 6) lumbar branch of iliolumbar, 7) lateral sacral; all spinal arteries give rise to arteries supplying dorsal and ventral roots of spinal nerves; most are exhausted in supplying the roots as radicular arteries, but some (4-9) are large enough to reach and anastomose with the anterior and posterior spinal arteries and are designated instead as segmental medullary arteries.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012