Acta biologica Academiae Scientiarum Hungaricae最新文献

{"title":"Experimental studies on hypokinesis of skeletal muscle with different functions. VI.","authors":"I Sohár, O Takács, F Guba, I Sziklai, T Szilágyi","doi":"","DOIUrl":"","url":null,"abstract":"In rabbits, the right hind limb was immobilized by means of plaster cast for 1, 2, 4 or 6 weeks and the activities of some metabolic enzymes: GOT, GPT, LDH, aldolase and acid phosphatase (in part of lysosomal origin), were examined in the slow m. soleus, and in the fast m. gastrocnemius. The former muscle is known to have mainly an oxidative, while the latter mainly a glycolytic type of metabolism. The activities of enzymes highly involved in the metabolism of the muscle diminished for a certain time during atrophy, then a relative rise occurred. Acid phosphatase activity likewise decreased after an initial relative increase. Reduction of enzymatic activities is explained by the activation of proteolytic enzymes, on the basis of measurements performed in these experiments and of results published by others. The decrease of enzymatic activity was more marked in the muscle which in normal state exhibits higher activity than in the other type of muscle studied. Thus, in the gastrocnemius a high rate of degradation of glycolytic enzymes was observed, while in the soleus degradation of oxidative enzymes prevailed. This phenomenon leads to the dedifferentiation of the muscle cell during immobilization.","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"33 4","pages":"385-90"},"PeriodicalIF":0.0,"publicationDate":"1982-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18183671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Golgi method in current neurobiological research. 高尔基法在当前神经生物学研究中的应用。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

T Tömböl

引用次数: 0

Serotonin-containing nerves in Torpedo electric organ. 鱼雷电器官中含有血清素的神经。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

T M Turpaev, D A Sakharov, N Salimova, N Kovaćević, L Rakić

引用次数: 0

The liaison brain for voluntary movement: the supplementary motor area. 负责自主运动的联络脑:辅助运动区。

Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1982-01-01

J C Eccles

{"title":"The liaison brain for voluntary movement: the supplementary motor area.","authors":"J C Eccles","doi":"","DOIUrl":"","url":null,"abstract":"An account of the origin of the term liaison brain leads on to an historical account of its usage, particularly in voluntary movement. Empirical evidence was provided by the readiness potential of Kornhuber and associates, which even indicated a key role for the supplementary motor area, SMA. It was found by Brinkman and Porter that in voluntary movement many neurones of the SMA were activated probably up to 200 msec before the pyramidal tract discharge. Then came the (133)Xe investigations of regional cerebral blood flow by Roland and associates to reveal that there was neuronal activity in the SMA of both sides during a continued series of voluntary movements, and that his even occurred when the movement was being thought of but not executed. The microstructure and connectivities of the SMAS are considered in relationship to its proposed key role in being excited by the mental act of intention and then calling up the appropriate motor programs to give the desired movement: each mental intention would act on the SMA in a specific manner; the SMA has an 'inventory' and the 'addresses' of stored subroutines of all learnt motor programs and so is able to institute the desired movement by its neuronal connectivites. In conclusion there is a general account of the concept of the liaison brain both for intention and perception.","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"33 2-3","pages":"157-72"},"PeriodicalIF":0.0,"publicationDate":"1982-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18195385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0