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Brain Stem

Versione 1

Abstract

Heterotopias of white matter within the medulla oblongata have been described. The left pyramid decussates first in about 73% of individuals. Interesting variations in the pyramidal tracts have been reported. In about 71% of 144 specimens, both crossed and uncrossed pyramidal tracts were present bilaterally. In 13%, only crossed tracts were present; in 12%, both crossed tracts and one uncrossed tract were present; in 2.8%, only uncrossed tracts were found; and in 0.7%, one pyramid was totally crossed, and the other pyramid was totally uncrossed.

Heterotopias of white matter within the medulla oblongata have been described.

The left pyramid decussates first in about 73% of individuals. Interesting variations in the pyramidal tracts have been reported. In about 71% of 144 specimens, both crossed and uncrossed pyramidal tracts were present bilaterally. In 13%, only crossed tracts were present; in 12%, both crossed tracts and one uncrossed tract were present; in 2.8%, only uncrossed tracts were found; and in 0.7%, one pyramid was totally crossed, and the other pyramid was totally uncrossed.

Riferimenti dell’opera originale

Elenco riportato come compare nella fonte, senza normalizzazione dei formati bibliografici.

  • Bairamian, D., Di Chiro, G., Theodore, W.H., Holmes, M.D. Dorwart, R.H. and S.M. Larson. (1985) MR imaging and positron emission tomography of cortical heterotopia. J. of Computer Assisted Tomography 9(6):1137-1139.
  • Bergeron, R.T. (1967) Pneumographic demonstration of subependyml heterotopic cortical gray matter in children. Am. J. Roentgenol. 101:168-167.
  • Deeb, Z.L., Rothfus, W.E. and J.C. Maroon. (1985) MR imaging of heterotopic gray matter. J. Comp. Assist. Tomogr. 9(6):1140-1141.
  • Dejerine, -. et -. Dejerine. (1904) Le faisceau pyramidal direct. Rev. Neurol. 12:253-274.
  • Féré, -. (1876) Anomalies du cerveau. Bulletins et Mem. de la Société Anatomique de Paris LI(2):172-173.
  • Féré, -. (1876) Anomlaies du cerveau. Bulletins et Mem. de la Société Anatomique de Paris LI(6):439-442.
  • Hoche, A. (1897) über Variationen im Verlauf der Pyramidenbahn. Neurol. Centralblatt 16:993-997.
  • Maunoury, G. (1880) Anomalies considèrables des circonvolutions cèrèbrales. Bulletins et Mem. de la Société Anatomique de Paris LV(1):28-32.
  • Mikhael, M.A. and A.G. Mattar (1978) Malformation of the cerebral cortex with heterotopia of the gray matter. J. Comput. Assist. Tomogr. 2:291-296.
  • Mueller, C.F. (1970) Heterotopic gray matter. Radiology 94:357-358.
  • Quinquaud, -. (1867) Anomalie des fibres arciformes du bulbe rachidien. Bulletins et Mem. de la Societe Anatomique de Paris XLII(1):19-21.
  • Sweet, W.H. (1976) Recent observations pertinent to improving anterolateral cordotomy. Clin. Neurosurg. 23:80-95.

Classificazione anatomica

Sistemi:
Sistema nervoso

Provenienza del contenuto

Adattamento

Adattamento di «Brain Stem — Illustrated Encyclopedia of Human Anatomic Variation: Opus I: Muscular System» di Ronald A. Bergman, Adel K. Afifi, Ryosuke Miyauchi. Fonte: https://www.anatomyatlases.org/AnatomicVariants/NervousSystem/Text/BrainStem.shtml Opera originale distribuita con licenza CC BY-NC-SA 4.0 (https://creativecommons.org/licenses/by-nc-sa/4.0/deed.it). Adattamento a cura di Redazione AIVA. Modifiche rispetto all’originale: Testo originale inglese riprodotto integralmente e riorganizzato nel formato scheda del portale (sintesi, testo, riferimenti), senza modificarne le affermazioni. La traduzione italiana non è ancora stata eseguita, e la pagina lo dichiara. Le figure non sono state copiate: sono collegate alla pagina d’origine. Questa pubblicazione non è approvata né avallata dagli autori dell’opera originale.

Licenza

Questo contenuto è distribuito con licenza CC BY-NC-SA 4.0. Licenze e attribuzioni