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THE EXPERIMENTAL STUDY ON HEAD INJURY:Head injury and posttraumatic disorder induced by experimental neurovascular friction Hideo Terao 1 1Dept. of Neurosurgery, Faculty of Medicine, Univ. of Tokyo pp.1063-1072
Published Date 1963/11/1
DOI https://doi.org/10.11477/mf.1406201568
  • Abstract
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 We investigated clinical manifestations induced by a mechanism of neurovascular friction in dogs and monkeys. Craniotomy was performed in these animals, and fine stainless steel wire hooks were suspended on the cerebral arteries at different points in different animals. The free ends of these wire hooks were hitched on to the scalp through the wound. After varying intervals of between two to fourteen days after operation, after having assured that animals recovered completely from the effects of operation, the exposed ends of the wire were tugged briskly, two or three times. No matter which artery was subjected to traction, the animals lapsed into unconsciousness and collapsed immediately. The degree of disturbance of consciousness varied from slight clouding of consciousness to deep coma, and the duration of disturbance of consciousness also varied from a mere 5-6 minutes to 8 hours. During the period of unconsciousness a varied mixture of signs ranging from nausea and vomiting, acceleration of respiration, tachycadia, photophobia, urination, and exaggeration of reflex to hyperkinesis were observed. As time elapsed, consciousness was regained gradually and in the majority of cases the animals revealed no visible neurological defects. These manifestations greaatly resembled those found in the condition "commotio cerebri" in man. In some cases, temporary neurological symptoms, ascribable to the areas supplied by the artery tracted, were recognized. For example, traction of a middle cerebral artery caused temporary hemiparesis, monoparesis, or hypesthesia, and traction of a basilar artery was followed by temporary ataxia and/or nystagmus.

 We observed these animals for long periods after traction, and noted various types of neurotic condition, which very resembled some types of posttraumatic neurosis in man.

 Headache complaining behavoir, impairment of memory, character changes and disturbance of the autonomic nervous system were obsereed in some monkeys.

 we were able to demonstrate the sequels of head injury ranging from cerebral concussion to posttraumatic neurosis in animals by traction on the cerebral arteries. Thus we conclude that the mechanism of neurovascular friction plays a great part in the development of symptoms in closed head injury.


Copyright © 1963, Igaku-Shoin Ltd. All rights reserved.

基本情報

電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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