The number of nerve fibers in motor spinal nerve roots of young, mature and aged cats

1958 ◽  
Vol 131 (4) ◽  
pp. 681-699 ◽  
Author(s):  
Elizabeth K. Moyer ◽  
Barbara F. Kaliszewski
Keyword(s):  
Spinal Nerve ◽  
Nerve Fibers ◽  
Spinal Nerve Roots ◽  
Nerve Roots

Lumbosacral intersegmental epispinal axons and ectopic ventral nerve rootlets

1987 ◽  
Vol 67 (2) ◽  
pp. 269-277 ◽  
Author(s):  
Wesley W. Parke ◽  
Ryo Watanabe
Keyword(s):  
Nerve Root ◽  
Sensory Nerve ◽  
Conus Medullaris ◽  
Spinal Nerve ◽  
Nerve Fibers ◽  
Ventral Horn ◽  
Spinal Nerve Roots ◽  
Nerve Roots ◽  
Content Type ◽  
Almost All

✓ An epispinal system of motor axons virtually covers the ventral and lateral funiculi of the human conus medullaris between the L-2 and S-2 levels. These nerve fibers apparently arise from motor cells of the ventral horn nuclei and join spinal nerve roots caudal to their level of origin. In all observed spinal cords, many of these axons converged at the cord surface and formed an irregular group of ectopic rootlets that could be visually traced to join conventional spinal nerve roots at one to several segments inferior to their original segmental level; occasional rootlets joined a dorsal nerve root. As almost all previous reports of nerve root interconnections involved only the dorsal roots and have been cited to explain a lack of an absolute segmental sensory nerve distribution, it is believed that these intersegmental motor fibers may similarly explain a more diffuse efferent distribution than has previously been suspected.

scholarly journals Neoplasms of Mesenchymal Origin in the Spinal Cord and Nerve Roots of Three Dogs

1976 ◽  
Vol 13 (1) ◽  
pp. 47-58 ◽  
Author(s):  
M. Vandevelde ◽  
R. J. Higgins ◽  
C. E. Greene
Keyword(s):  
Spinal Cord ◽  
Malignant Tumors ◽  
Spinal Nerve ◽  
Nerve Fibers ◽  
Intramedullary Tumor ◽  
Reticulum Cell ◽  
Spinal Nerve Roots ◽  
Nerve Roots ◽  
Clinicopathological Findings ◽  
Spinal Roots

Clinicopathological findings of three different neoplastic conditions involving the spinal cord and nerve roots in three dogs are described. One sarcomatous intramedullary tumor closely associated with the vasculature was classified as a reticulum cell sarcoma of the spinal cord. The second case had massive and widespread neoplastic proliferation of reticulohistiocytic cells around the perineurinal vessels of many spinal nerve roots. The process was classified as a primary neoplastic reticulosis of the spinal roots. Multiple highly malignant tumors, infiltrating the spinal cord were found in one thoracic and several lumbosacral spinal nerve roots in the third case. These were considered to be anaplastic neurofibrosarcomas because of high collagen content, intact nerve fibers, whorl formation, and the tendency to palisade in some areas.

scholarly journals The diameters and number of nerve fibers in spinal nerve roots

2014 ◽  
Vol 38 (4) ◽  
pp. 532-537 ◽  
Author(s):  
YongTao Liu ◽  
XiaoJi Zhou ◽  
Jun Ma ◽  
YingBin Ge ◽  
Xiaojian Cao
Keyword(s):  
Spinal Nerve ◽  
Nerve Fibers ◽  
Spinal Nerve Roots ◽  
Nerve Roots

Conduction properties of single nerve fibers in developing rat spinal nerve roots

1987 ◽  
Vol 411 (1) ◽  
pp. 167-171
Author(s):  
Michael Rasminsky ◽  
Pierre-Jacques Ricot
Keyword(s):  
Spinal Nerve ◽  
Nerve Fibers ◽  
Spinal Nerve Roots ◽  
Nerve Roots ◽  
Single Nerve ◽  
Developing Rat ◽  
Conduction Properties

Hemangioma of spinal nerve root

1999 ◽  
Vol 91 (2) ◽  
pp. 175-180 ◽  
Author(s):  
Federico Roncaroli ◽  
Bernd W. Scheithauer ◽  
William E. Krauss
Keyword(s):  
Nerve Root ◽  
Cauda Equina ◽  
Spinal Nerve ◽  
Nerve Fibers ◽  
Capillary Hemangioma ◽  
Spinal Nerve Root ◽  
Spinal Nerve Roots ◽  
Nerve Roots ◽  
Content Type ◽  
Fine Print

Object. Hemangiomas of the spinal nerve roots are rare. Only 12 cases have been reported in the literature, all since 1965. These lesions occurred in adults, primarily in males, and were located in the cauda equina. Of the 12 lesions, eight were cavernous hemangiomas. The authors report here the clinicopathological features of 10 cases of hemangioma of the spinal nerve root, nine of which were of the capillary type. Methods. The group included six men and four women who ranged in age from 40 to 62 years. The majority of patients presented with pain and weakness. One patient also experienced worsening of pain during menses. In all cases, gadolinium-enhanced magnetic resonance imaging or computerized tomography myelography demonstrated a discrete intraspinal extramedullary mass. Administration of contrast agent resulted in uniform, intense enhancement. A gross-total resection was achieved in all but one case; in most cases, it was necessary to sacrifice the parent nerve root. Preoperative symptoms and signs improved in nine cases. On histological examination, all but one tumor, a spindle-cell hemangioendothelioma, were shown to be ordinary capillary hemangiomas. Two lesions exhibited a cavernous component, and five showed a partly solid growth pattern resembling juvenile capillary hemangioma. In all cases, the relationship with the nerve root was histologically confirmed. The tumor—nerve relation varied. The intact nerve was displaced by the epineurial mass in three cases. The fascicles appeared separated in six cases, and individual nerve fibers were seen throughout one lesion with endoneurial involvement. Conclusions. Hemangiomas of spinal nerve roots pose a challenging diagnostic problem. Knowledge of their existence is relevant in that they may mimic tumors and are amenable to surgical treatment.

Enlarged spinal nerve roots in RASopathies: Report of two cases

2021 ◽  
Vol 64 (4) ◽  
pp. 104187
Author(s):  
Leoni Chiara ◽  
Tedesco Marta ◽  
Talloa Dario ◽  
Verdolotti Tommaso ◽  
Onesimo Roberta ◽  
...  
Keyword(s):  
Spinal Nerve ◽  
Spinal Nerve Roots ◽  
Nerve Roots

Ultrastructural Changes in Spinal Nerve Roots Induced by Autologous Nucleus Pulposus

Spine ◽  
1996 ◽  
Vol 21 (4) ◽  
pp. 411-414 ◽  
Author(s):  
Kjell Olmarker ◽  
Claes Nordborg ◽  
Karin Larsson ◽  
Björn Rydevik
Keyword(s):  
Nucleus Pulposus ◽  
Spinal Nerve ◽  
Ultrastructural Changes ◽  
Spinal Nerve Roots ◽  
Nerve Roots
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