Observations on the pia-arachnoid of the anterior median fissure and the posterior median sulcus of the fetal spinal cord of the albino mouse

1980 ◽  
Vol 108 (1) ◽  
pp. 30-33 ◽  
Author(s):  
Nabi N.Y. Nawar
Keyword(s):  
Spinal Cord ◽  
Posterior Median ◽  
Anterior Median

Microangioarchitecture of the feline spinal cord

1987 ◽  
Vol 66 (3) ◽  
pp. 447-452 ◽  
Author(s):  
Yutaka Naka ◽  
Toru Itakura ◽  
Kunio Nakai ◽  
Kazuo Nakakita ◽  
Harumichi Imai ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Dorsal Surface ◽  
Ventral Surface ◽  
Anterior Spinal Artery ◽  
Corrosion Casts ◽  
Thoracic Spinal Cord ◽  
Content Type ◽  
Thoracic Spinal ◽  
Fine Print ◽  
Anterior Median

✓ The microangioarchitecture of corrosion casts of the cat spinal cord was studied by scanning electron microscopy. On the ventral surface of the spinal cord, the anterior spinal artery and the anterior spinal vein ran parallel along the anterior median fissure. Many central arteries branching from the anterior spinal artery coursed in a wavelike manner in the anterior median fissure. The number of central arteries was lowest in the thoracic spinal cord. Central arteries at some spinal cord levels revealed well-developed anastomoses with other central arteries in the anterior median fissure. These well-developed anastomotic central arteries were frequently observed in the thoracic spinal cord, in which the number of central arteries was lowest. On the dorsal surface of the spinal cord, the posterior spinal vein ran longitudinally at the midline and was drained by circumferential veins and posterior central veins. This vein formed a characteristic anastomotic plexus. Small arterioles (20 µm in diameter) in the spinal parenchyma revealed a ring-like compression at the branching site.

scholarly journals A pathway of NADPH diaphorase positivity between central canal and pial surface at anterior fissure in spinal cord: Supra fissure area with hypothesis configuring from dog, rat, monkey and pigeon

2020 ◽  
Author(s):  
Yunge Jia ◽  
Yinhua Li ◽  
Wei Hou ◽  
Fuhong Li ◽  
Haoran Sun ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Gray Matter ◽  
Anterior Commissure ◽  
Central Canal ◽  
Nadph Diaphorase ◽  
Thoracic Spinal Cord ◽  
Thoracic Spinal ◽  
Enzyme Histology ◽  
Aged Monkey ◽  
Anterior Median

ABSTRACTThe spinal cord is a cylinder structure in the vertebra and thought a simplified with the gray matter and white matter. Rexed lamination for the gray matter and regional sub-division for whiter matter are completely termed to date. Anterior commissure locates between the central canal and the anterior median fissure. However, some experimental data may still confront with new confined anatomical interpretation. By using NADPH diaphorase [N-d] enzyme histology, we found a vertical oriented neuronal pathway between the central canal and the anterior median fissure in the sacral spinal cord of young adult and aged dog. We used a term “supra fissure area” [SFA] to illustrate the region which consisted of the gray commissure and anterior white commissure. The N-d pathway was notably observable in aged animals. The vertical neurites revealed the cerebrospinal fluid [CSF] contacting neurites between the anterior median fissure and the central canal. We further examined the monkey, rat and pigeon in the region for better understanding of the structure and potential function. The neurodegeneration of N-d dystrophy was detected in the [SFA] in the thoracic spinal cord of the aged monkey. N-d positive fibers were detected in anterior fissure of the rat spinal cord. N-d fibrous structures were also detected in the pigeon spinal cord. These results suggested a new pathway of CSF contacting neurons and the neuronal communications about the central canal.

scholarly journals Evaluation of Morphological Patterns of Anterior Median Fissures in the Cervical Spinal Cord by Using Computed Tomography-Myelography

2016 ◽  
Vol 30 (3) ◽  
pp. 304-307
Author(s):  
Yuki Oichi ◽  
Junya Hanakita ◽  
Toshiyuki Takahashi ◽  
Manabu Minami ◽  
Taigo Kawaoka ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Spinal Cord ◽  
Cervical Spinal Cord ◽  
Morphological Patterns ◽  
Anterior Median

Different functions of different eye types in the spider Cupiennius salei.

1998 ◽  
Vol 201 (2) ◽  
pp. 221-225 ◽  
Author(s):  
A Schmid
Keyword(s):  
Visual Information ◽  
Mating Behaviour ◽  
Visual Fields ◽  
Cupiennius Salei ◽  
Posterior Median ◽  
Simultaneous Choice ◽  
Target Detecting ◽  
Spider Cupiennius Salei ◽  
Median Eyes ◽  
Anterior Median

The Central American hunting spider Cupiennius salei Keys relies mainly on its mechanosensory systems during prey-catching and mating behaviour. The behavioural relevance of its eight eyes has not been studied before, although their optics and sensitivity suggest highly developed visual capabilities. The visual system was examined in a twofold simultaneous-choice experiment. Two targets were presented at a distance of 2 m from the animals, and their walking paths towards the targets were monitored. Spiders showed no preference when choosing between two identical targets, but when choosing between two different targets they strongly preferred a vertical bar to a sloping bar or a V-shaped target. By covering all eyes except the anterior median or posterior median eyes, it could be shown that the spiders were able to detect the targets using any of the eyes. Discrimination between different targets was only possible with the anterior median eyes uncovered, although the visual fields of the anterior median and posterior median eyes overlap completely. It seems most likely that the animals separate visual information in the periphery and therefore that the eyes have different functions. The posterior median eyes support a target-detecting mechanism and the anterior median eyes a target-discrimination mechanism.

Resection of cervical ependymoma

2014 ◽  
Vol 37 (v2supplement) ◽  
pp. Video14
Author(s):  
Giuseppe Lanzino ◽  
Saul F. Morales-Valero ◽  
William E. Krauss ◽  
Mario Campero ◽  
W. Richard Marsh
Keyword(s):  
Spinal Cord ◽  
Surgical Resection ◽  
Intraoperative Ultrasound ◽  
Vascular Supply ◽  
Complete Resection ◽  
Entire Length ◽  
Anterior Spinal Artery ◽  
Posterior Median ◽  
Link Type

Intramedullary ependymomas are surgically curable tumors. However, their surgical resection poses several challenges. In this intraoperative video we illustrate the main steps for the surgical resection of a cervical intramedullary ependymoma. These critical steps include: adequate exposure of the entire length of the tumor; use of the intraoperative ultrasound; identification of the posterior median sulcus and separation of the posterior columns; Identification of the plane between the spinal cord and the tumor; mobilization and debulking of the tumor and disconnection of the vascular supply (usually from small anterior spinal artery branches). Following these basic steps a complete resection can be safely achieved in many cases.The video can be found here: http://youtu.be/QMYXC_F4O4U.

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