Spinal Reflexes
Mostrando 1-12 de 92 artigos, teses e dissertações.
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1. Effect of S-methyl-l-thiocitrulline dihydrochloride on rat micturition reflex
ABSTRACT Objective: To evaluate the effect of neuronal nitric oxide synthase on the striated urethral sphincter and the urinary bladder. Materials and Methods: A coaxial catheter was implanted in the proximal urethra and another one in the bladder of female rats, which were anesthetized with subcutaneous injection of urethane. The urethral pressure with sa
Int. braz j urol.. Publicado em: 2016-10
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2. Web-based neuromuscular simulator applied to the teaching of principles of neuroscience
INTRODUCTION: The learning of core concepts in neuroscience can be reinforced by a hands-on approach, either experimental or computer-based. In this work, we present a web-based multi-scale neuromuscular simulator that is being used as a teaching aid in a campus-wide course on the Principles of Neuroscience. METHODS: The simulator has several built-in indivi
Rev. Bras. Eng. Bioméd.. Publicado em: 2013-09
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3. Electromyographic pattern in lower limbs in response to postural perturbations / Padrão eletromiográfico de membros inferiores em resposta a perturbações posturais
Balance depends on the synergic activation of muscles bilaterally, and there is evidence that this coordination is mediated by spinal circuits, which are under supra-spinal control. The objective of this study is to describe neurophysiologic and biomechanical mechanisms involved in the postural control of healthy subjects submitted to a disturbance provoked
Publicado em: 2008
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4. Importância da região AV3V e de mecanismos colinérgicos e angiotensinérgicos centrais para os efeitos cardiovasculares produzidos pela ativação da área rostroventrolateral do bulbo
Cardiovascular responses are integrated at different levels of the central nervous system (CNS). In the brainstem, there are different areas related to the cardiovascular control such as the rostral ventrolateral medulla (RVLM) that activates sympathetic pre-ganglionic neurons in the spinal cord (IML) inducing pressor response. Like glutamatergic activation,
Publicado em: 2008
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5. Behavioral and physiological methods for early quantitative assessment of spinal cord injury and prognosis in rats
Methods for reliable evaluation of spinal cord (SC) injury in rats at short periods (2 and 24 h) after lesion were tested to characterize the mechanisms implicated in primary SC damage. We measured the physiological changes occurring after several procedures for producing SC injury, with particular emphasis on sensorimotor functions. Segmental and suprasegme
Brazilian Journal of Medical and Biological Research. Publicado em: 2006-12
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6. Importância da região AV3V para as respostas pressoras produzidas pela ativação de áreas bulbares.
Cardiovascular responses are integrated at different levels of the central nervous system (CNS). Particularly the hypothalamus and brainstem areas are involved in the control of autonomic responses and among them the cardiovascular responses. Different areas in the brainstem, like the nucleus tract solitarii (NTS), the rostroventrolateral medulla (RVLM), cau
Publicado em: 2005
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7. Naloxone enhancement of spinal reflexes in the rabbit.
The effects of intravenous morphine, (-)-naloxone and (+)-naloxone have been studied on three ipsilateral cutaneo-muscular reflexes in spinal rabbits. Morphine, 3 mg/kg caused a slow-onset depression of all three reflexes. This effect was naloxone reversible. The ipsilateral extensor reflexes, sural to gastrocnemius medialis and saphenous to vastus lateralis
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8. Neuronally mediated interactions between urinary bladder and internal anal sphincter motility in the cat.
The effects of stimulation of vesical afferents on the electrical activity of the internal anal sphincter were studied in anaesthetized cats. Excitation of vesical afferents, either by electrical stimulation of nerves running at the vesico-ureteral junction or by bladder distension, produced (1) an increase in the electrical activity of the internal anal sph
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9. Human flexor reflexes
One type of flexor reflex, that recorded from the tibialis anterior muscle in response to electrical stimulation of the sole of the foot, was studied in normal subjects and patients with several neurological disorders. Normally this reflex consists of two components, the second of which is related to the actual withdrawal. The first component, normally of lo
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10. Cutaneous inhibitory receptive fields of withdrawal reflexes in the decerebrate spinal rat.
1. The inhibitory cutaneous input to the withdrawal reflex pathways to single hindlimb muscles was investigated in decerebrate spinal rats (n = 53) using electromyography. 2. Withdrawal reflexes in the peronei, extensor digitorum longus and tibialis anterior muscles of the leg were strongly inhibited by conditioning mechanical, thermal (CO2 laser) and intrac
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11. Viscero-somatic and viscero-visceral reflexes in brain death.
Little is known about spinal visceral reflexes in brain-dead man, although they have been described in experimental animals. In 1983, 25 brain-dead individuals were observed during donor nephrectomy. It was confirmed that some of these donors, without higher centre modulation and not under significant pharmacological influence, had viscero-somatic motor refl
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12. Postnatal development of the nociceptive withdrawal reflexes in the rat: a behavioural and electromyographic study.
1. The postnatal development of nociceptive withdrawal reflexes was studied. In awake intact rats, forelimb, hindlimb and tail reflexes were recorded on videotape. In decerebrate spinal rats, electromyography (EMG) was used to record nociceptive withdrawal reflexes in musculi extensor digitorum longus (EDL), peronei, gastrocnemius-soleus (G-S) and biceps pos