Cerebral Excitability
Mostrando 1-12 de 23 artigos, teses e dissertações.
-
1. Environmental enrichment reduces brain excitability in adult rats overnourished during lactation
RESUMO Objetivo: Este estudo analisou se a exposição ao ambiente enriquecido durante a fase juvenil da vida interferiria na atividade elétrica do cérebro de ratos adultos. Além disso, a presente pesquisa também investigou se esse provável efeito na atividade elétrica cerebral poderia ser afetado pela hipernutrição durante a lactação. A eletrofis
Arq. Neuro-Psiquiatr.. Publicado em: 05/09/2019
-
2. Investigaçăo sobre o impacto da estimulaçăo transcraniana por corrente contínua em tarefa de resoluçăo temporal por meio da prova RGDT - Random Gap Detection Test
The Central Auditory Processing Disorders are the deficiency of one or more hearing processes and mechanisms or the deficiency of major dysfunctions. Considering that new therapeutic and/or diagnostic approaches should be investigated, recent studies have shown that non invasive cerebral stimulation tools are efficient in the modulation of brain activity in
Publicado em: 2009
-
3. Efeito do 1,8-cineol sobre os parâmetros eletrofisiológicos das células nervosas do gânglio cervical superior de ratos / Effect of 1,8-cineol on electrophysiological parameters of nerve cells in the rat superior cervical ganglion
1,8-cineol is a terpene that constitutes many essential oils from medicinal folk plants. This compound presents many pharmacological activities as anti-inflammatory, antitumoral and gastroprotective. However it is difficult to find studies that relate the effects of both essential oils and its compounds in nervous system tissues. Since many of these oils and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/07/2007
-
4. Influência da dieta cetogênica rica em triacilgliceróis de cadeia média e longa sobre a propagação da depressão alastrante cortical em ratos. / effects of short-term and long-term treatment with medium-and long-chain triglycerides ketogenic diet on cotical spreading depression in young rats.
A dieta cetogênica é caracterizada por altos níveis de lipídios e baixos níveis de proteínas e de carboidratos. Devido à sua grande interferência no metabolismo corporal, em especial na excitabilidade cerebral, este tipo de dieta tem sido utilizado para o tratamento de diversas doenças, em destaque a epilepsia. Este trabalho é composto por dois art
Publicado em: 2007
-
5. Determinação e modulação da excitabilidade cortical pela estimação magnética transcraniana
15 In the present study, we performed rTMS in five patients with intractable epilepsy, recording the number of daily seizures during 3 months before treatment, 3 months of treatment with bi-weekly rTMS sessions, and for 3 months after treatment. We have found a mean reduction of 22% in the number of daily seizures, during the period of treatment (range: 9.23
Publicado em: 2007
-
6. Sympathetic innervation and excitability of arterioles originating from the rat middle cerebral artery.
The densities of the adrenergic innervation of the internal carotid and middle cerebral arteries and their extracerebral branches have been determined using fluorescence histochemistry. The density of the nerve plexus on the internal carotid artery was greater than that of the middle cerebral artery. The density of the plexus on the middle cerebral artery de
-
7. Axonal excitability and motor propagation velocity of peripheral nerves in patients with acute vascular lesions of the brain.
From measurements of maximum and minimum motor nerve propagation velocity and neuronal excitability we conclude that there is a functional loss of motor units and distal nerve "dying back" in persons affected with unilateral acute cerebral vascular lesions. The study also suggests that transynaptic degeneration affects the lower motor neurone function on bot
-
8. Some Electrophysiological Methods for Studying the Action of Narcotic Agents in Animals, with special reference to Industrial Solvents: A Review
Four electrophysiological methods, two based on stimulation (measurement of spinal reflex excitability and of direct excitability of the cerebral motor cortex) and two based on bioelectric recording (electro-encephalography and electrocardiography), were used in intact guinea-pigs and rabbits for studying the action of narcotic and anaesthetic agents, especi
-
9. Cholecystokinin-immunoreactive neurons in rat and monkey cerebral cortex make symmetric synapses and have intimate associations with blood vessels.
Neurons displaying cholecystokinin-like immunoreactivity (CCK neurons) in rat and monkey cerebral cortex were examined by light and electron microscopic immunocytochemistry. CCK neurons were found to be mainly bipolar cells present in all layers and in all areas of the rat cerebral cortex. CCK neurons were also found in all regions examined in monkey cortex
-
10. Dopamine synaptic complex with pyramidal neurons in primate cerebral cortex.
Dopamine (DA)-containing projections to the cerebral cortex are considered to play an important role in cognitive processes. Using a recently developed monoclonal antiserum directed against DA and an antibody directed against tyrosine hydroxylase in combination with Golgi impregnation and electron microscopy, we have observed that DA and tyrosine hydroxylase
-
11. Trichloroethanol in Trichloroethylene Poisoning
Trichloroethylene and trichloroethanol were given intraperitoneally to guinea-pigs. Their effects were tested by measuring the threshold current intensity of electrical skin stimulation, the electrical excitability of the motor cerebral cortex, by recording and analysis of the electroencephalogram, and by electrocardiographic examination. The two compounds h
-
12. Sensitivity of calcium binding in cerebral tissue to weak environmental electric fields oscillating at low frequency.
Weak sinusoidal electric fields modify the calcium efflux from freshly isolated chick and cat cerebral tissues bathed in Ringer's solution, at 36 degrees. Following incubation (30 min) with radioactive calcium (45Ca2+), each sample, immersed in fresh solution, was exposed for 20 min to fields at 1, 6, 16, 32, or 75 Hz, with electric gradients of 5, 10, 56, a