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- W2072303363 abstract "SUMMARY Some, of the probable physiopathological mechanisms of post-traumatic epilepsy have been reviewed and an hypothesis concerning an additional mechanism involving the decrease in inhibitory controls which might ensue with rupture of axon collaterals has been presented. Disruption of finely regulated vascular supply producing periodic or chronic functional ischaemia is considered of likely importance in chronic epileptogenic lesions which follow penetrating wounds of the brain. Mechanical distortion of dendrites caught in a glial cicatrix may also be of importance, as suggested by Ward, though it is not proven. Defects in the blood-brain barrier and alterations in the buffering action of glial cells upon the maintenance of extracellular electrolyte balance may be also of importance. Finally it is proposed that the delicate collaterals which branch at right angles from axons of pyramidal cells may be particularly susceptible to the shearing forces of closed head injuries. Their rupture would result in a marked reduction in inhibitory controls permitting the recruitment of excessive synchronous discharge in large assemblies of neurones which is characteristic of the epileptic process. RÉSUMÉ On a revu quelques uns des mécanismes physiopathologiques probables de l'épilepsie post-traumatique. l'hypothèse d'un autre mécanisme impliquant la diminution possible des contrôles inhibiteurs, qui pourrait survenir à la suite de la rupture des collatérales d'axones, a été présentée. On considère, qui l'interruption d'un apport sanguin délicatement ajusté, en produisant une ischémie fonctionnelle chronique ou périodique, a vraisemblablement de 1'importance dans les lésions épileptogènes chroniques, qui surviennent à la suite de blessures pénétrantes du cerveau. Comme l'a suggéré Ward, la déformation mécanique des dendrites, emprisonnées dans une cicatrice gliale, pourrait avoir quelque importance, bien que ceci ne soit pas prouvé. Des défectuosités de la barrière hémo-encéphalique et des modifications de l'action tampon des cellules gliales agissant pour le maintien de l'équilibre électrolytique extracellulaire peuvent aussi avoir leur importance. Enfin, il est suggéré que les déli-cates collatérales d'axones, qui bifurquent à angle droit vers les cellules pyramidales, pourraient être particulièrement sensibles aux forces cisaillantes, qui surviennent au cours des traumatismes crâniens fermés. Leur rupture aménerait une réduction marquée des contrôles inhibiteurs, permettant dans de grandes populations de neurones, le recrutement de décharge excessive synchrone, caractéristique d'un processus épilep-tique." @default.
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- W2072303363 date "1970-03-01" @default.
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- W2072303363 title "Physiopathological Mechanisms of Post-Traumatic Epilepsy" @default.
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- W2072303363 doi "https://doi.org/10.1111/j.1528-1157.1970.tb03868.x" @default.
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