Conus medullaris: Difference between revisions
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==Overview== | |||
The '''conus medullaris''' is the terminal end of the [[spinal cord]]. It occurs near [[lumbar nerve]]s 1 (L1) and 2 (L2). After the spinal cord terminates, the spinal nerves continue as dangling nerves called the [[cauda equina]]. The upper end of the conus medullaris is usually not well defined. | The '''conus medullaris''' is the terminal end of the [[spinal cord]]. It occurs near [[lumbar nerve]]s 1 (L1) and 2 (L2). After the spinal cord terminates, the spinal nerves continue as dangling nerves called the [[cauda equina]]. The upper end of the conus medullaris is usually not well defined. | ||
Latest revision as of 15:06, 15 November 2015
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
The conus medullaris is the terminal end of the spinal cord. It occurs near lumbar nerves 1 (L1) and 2 (L2). After the spinal cord terminates, the spinal nerves continue as dangling nerves called the cauda equina. The upper end of the conus medullaris is usually not well defined.
Blood supply
The blood supply consists of three spinal arterial vessels—the anterior median longitudinal arterial trunk and two posterolateral trunks. Other less prominent sources of blood supply include radicular arterial branches from the aorta, lateral sacral arteries, and the fifth lumbar, iliolumbar, and middle sacral arteries. The latter contribute more to the vascular supply of the cauda equina.
Pathology
The term "conus medullaris syndrome" is sometimes used to describe a condition similar to cauda equina syndrome.[1][2]
References
- ↑ Schwarz S, Zoubaa S, Knauth M, Sommer C, Storch-Hagenlocher B (2002). "Intravascular lymphomatosis presenting with a conus medullaris syndrome mimicking disseminated encephalomyelitis". Neuro-oncology. 4 (3): 187–91. PMID 12084349.
- ↑ "Medcyclopaedia - Conus medullaris syndrome". Retrieved 2007-11-22.
External links
- Template:UMichAtlas - "Lower Third of Spinal Cord, MRI"