scholarly journals Influence of Alkylamides of Glutamic Acid and Related Compounds on the Central Nervous System. I. Central Depressant Effect of Theanine

1971 ◽  
Vol 19 (6) ◽  
pp. 1257-1261 ◽  
Author(s):  
RYOHEI KIMURA ◽  
TOSHIRO MURATA
Author(s):  
H.C. Fibiger

SUMMARY:Nuclei of the extrapyramidal system contain among the highest levels of GABA and its synthesizing enzyme glutamic acid decarboxylase (GA D) in the central nervous system. In recent years the anatomical organization of GABAergic neurons in the extrapyramidal system has been the subject of considerable experimental enquiry. In this note, current knowledge concerning the origin and projections of GABAergic neurons in certain extrapyramidal nuclei is briefly reviewed.


2009 ◽  
Vol 64 (1-2) ◽  
pp. 1-5 ◽  
Author(s):  
Damião P. de Sousa ◽  
Franklin F. F. Nóbrega ◽  
Liana C. S. L. de Morais ◽  
Reinaldo N. de Almeida

Terpinen-4-ol is a monoterpenoid alcohol and component of the essential oils of several aromatic plants. Similarly to terpinen-4-ol, other monoterpenoid alcohols have shown anticonvulsant activity in convulsion animal models. The present study aimed to investigate the anticonvulsant activity of terpinen-4-ol. Treatment of mice with terpinen-4-ol ( 200 mg/kg) caused a signifi cant decrease in the spontaneous motor activity at 30, 60 and 120 min after administration. Terpinen-4-ol (100 and 200 mg/kg) produced a significant dosedependent increase in the duration of sleeping in mice. Pretreatment of mice with terpinen-4- ol at doses of 100, 200 and 300 mg/kg significantly increased the latency of pentylenetetrazole -induced convulsions. Terpinen-4-ol (200 and 300 mg/kg) also inhibited the induced seizures of picrotoxin. In another model, maximal electroshock seizure, terpinen-4-ol decreased the tonic hind convulsions percentage at the dose of 300 mg/kg. From the overall results we can conclude that terpinen-4-ol showed a depressant effect on the central nervous system and significant anticonvulsant activity.


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