conus medullaris

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Related to conus medullaris: cauda equina


 [ko´nus] (pl. co´ni) (L.)
1. a cone-shaped structure.
2. posterior staphyloma of the myopic eye.
conus arterio´sus the anterosuperior portion of the right ventricle of the heart, at the entrance to the pulmonary trunk. Called also infundibulum.
conus medulla´ris the cone-shaped lower end of the spinal cord, at the level of the upper lumbar vertebrae.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

co·nus me·dul·la·'ris

the tapering lower extremity of the spinal cord.
Synonym(s): medullary cone [TA]
Farlex Partner Medical Dictionary © Farlex 2012

conus medullaris

Anatomy The inferior, tapering portion of the spinal cord. See Spinal cord.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

med·ul·lar·y cone

(med'ŭ-lar'ē kōn) [TA]
The tapering lower extremity of the spinal cord.
Synonym(s): conus medullaris [TA] .
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
The painful asymmetric paraparesis in our patient was consistent with subacute painful meningoradiculitis seen in the early dissemination period of neuroborreliosis due to the presence of lymphocytic cell increase in the LP, polyradiculopathy in the EMG and contrast enhancement in leptomeninges, and conus medullaris and cauda equina fibers in the lumbar MRI examination.
Investigation of the radiological relationship between iliac crests, conus medullaris and vertebral level in children.
Caption: Figure 1: (a) The sagittal T2-weighted image shows a hyperintense lesion of the conus medullaris. (b) High signal is observed at the corresponding level on axial DWI.
Longitudinal myelitis, aseptic meningitis, and conus medullaris infarction as presenting manifestations of pediatric systemic lupus erythematosus.
In all cases, the kinking was located just above the end of the spinal cord where the conus medullaris (CM) was compressed by the OLF.
MR assessment revealed that the conus medullaris ended at the L3 vertebra superior end-plate level (tethered cord; Figure 2).
A case of tethered cord syndrome in the conus medullaris together with an intradural intramedullar tumor seen in an 8-year-old female patient is presented and discussed here.
[23,24] Typical Paraganglioma appear isointense to conus medullaris on T1 weighted sequence and hyperintense on T2 weighted sequence as seen in our case.
Numerous variations exist in the position of the conus medullaris with a peak incidence at the lower third of L1 but can range between the middle third of T12 and the upper third of L3 [2, 3].