Anterior median fissure of spinal cord
| Anterior median fissure of spinal cord | |
|---|---|
 A spinal nerve with its anterior and posterior roots. | |
 Transverse section of the spinal cord in the mid-thoracic region. | |
| Details | |
| Identifiers | |
| Latin | fissura mediana anterior medullae spinalis |
| TA98 | A14.1.02.007 |
| TA2 | 6053 |
| FMA | 83735 |
| Anatomical terminology | |
The anterior median fissure of the spinal cord is a deep midline groove of the anterior/ventral spinal cord.[1]: 486 It divides the white matter of the anterior spinal cord nearly in two.[1]: 487 The spinal pia mater extends into the fissure to line the surfaces of the spinal cord.[1]: 453
Anatomy
It has an average depth of about 3 mm, but this is increased in the lower part of the spinal cord. It contains a double fold of pia mater. Its floor is formed by a transverse band of white matter - the anterior white commissure - which is perforated by blood vessels on their way to or from the central part of the spinal cord.[citation needed]
Relations
The anterior median fissure provides a groove in which the anterior spinal artery sits.[citation needed]
Clinical significance
Imaging
The anterior median fissure may be identified on computerized tomography (CT) myelograms, but more commonly on magnetic resonance imaging (MRI) scans. The AMF has a characteristic appearance on MRI scans that differs from the MRI appearance of the central canal.[citation needed]
Additional images
-
Diagrams of the medulla spinalis.
References
This article incorporates text in the public domain from page 752 of the 20th edition of Gray's Anatomy (1918)
Tomsick T, Peak E, Wang L: Fluid-Signal Structures in the Cervical Spinal Cord on MRI: Anterior Median Fissure vs. Central Canal. AJNR 2017; 38:840–45
Oichi Y, Hanakita J, Takahashi T, Minami M, Kawakoa T, et al.: Morphological patterns of the anterior median fissure in the cervical spinal cord evaluated by computed tomography after myelography. Neurospine 2018; 15:388-393
Tomsick T, Wang L, Zuccarello M, Ringer AJ. Fluid-signal structures in the cervical spinal cord on MRI in Chiari patients: Central canal or anterior median fissure? AJNR Am J Neuroradiol. 2021 Apr;42(4):801-806. doi: 10.3174/ajnr.A7046. Epub 2021 Mar 11.PMID 33707286
References
- ^ ISBN 978-0-7295-3752-0.
External links
- Atlas image: n2a5p1 at the University of Michigan Health System - "Medulla Oblongata, Anterior View"
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