Navegando por Palavras-chave "neural conduction"

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    Condução nervosa em nervos da mão e o fator fisiológico idade
    (Academia Brasileira de Neurologia - ABNEURO, 2004-03-01) Valerio, Berenice Cataldo Oliveira; Nóbrega, João Antonio Maciel [UNIFESP]; Tilbery, Charles Peter; Faculdade da Santa Casa Departamento de Clínica Médica; Universidade Federal de São Paulo (UNIFESP)
    Many researchers have established the influence of physiological factors as age, for the parameters of the study of the motor and sensitive conduction. The objective of this study was to analyze the influence of the variable age in the study of the motor and sensitive nervous conduction of the median and ulnar nerves. The data were collected from 92 volunteers: 61 women and 31 men. Their age was from 13 to 74 years old, with a mean of 36.3 years. Most of them were employees at Santa Casa de São Paulo. It was observed that a reduction in the velocity of sensitive and motor nervous conduction takes place with the age. This reduction is associated with a reduction in the amplitude of the evoked potential.
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    Revisão relacionada a alguns aspectos técnicos e fisiológicos das ondas F e análise dos dados obtidos em um grupo de indivíduos diabéticos
    (Academia Brasileira de Neurologia - ABNEURO, 2001-06-01) Nobrega, João Antonio Maciel [UNIFESP]; Manzano, Gilberto Mastrocola [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    We reviwed some physiological aspects of the F-wave studies, mainly related to the motoneurone sizes involved in the generation of this potentials and the number of stimuli necessary to analyze the F-wave parameters. F-wave latencies and F-wave conduction velocities obtained in a group of normal volunteers and in a group of diabetic patients are analyzed.
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    Temporal branch of facial nerve A normative study of nerve conduction
    (Assoc Arquivos Neuro- Psiquiatria, 2010-08-01) Silva, Paula Fabiana Sobral da; Lima, Maria Carolina Martins de; Figueiroa, Jose Natal [UNIFESP]; Lins, Otavio Gomes [UNIFESP]; Inst Med Integral Prof Fernando Figueira IMIP; Universidade Federal de Pernambuco (UFPE); Universidade de São Paulo (USP); Escola Pernambucana Med FBV IMIP; Universidade Federal de São Paulo (UNIFESP)
    The temporal branch of the facial nerve is particularly vulnerable to traumatic injuries during surgical procedures. It may also be affected in clinical conditions. Electrodiagnostic studies may add additional information about the type and severity of injuries, thus allowing prognostic inferences. The objective of the present study was to develop and standardize an electrophysiological technique to specifically evaluate the temporal branch of the facial nerve. Method: Healthy volunteers (n=115) underwent stimulation of two points along the nerve trajectory, on both sides of the face. The stimulated points were distal (on the temple, over the temporal branch) and proximal (in retro-auricular region). Activities were recorded on the ipsilateral frontalis muscle. The following variables were studied: amplitude (A), distal motor latency (DML) and conduction velocity (NCV). Results: Differences between the sides were not significant. The proposed reference values were: A >= 0.4 mV, DML <3.9 ms and NCV >= 40 m/s. Variation between hemifaces should account for less than 60% for amplitudes and latency, and should be inferior to 20% for conduction velocity. Conclusion: These measurements are an adequate way for proposing normative values for the electrophysiological evaluation of the temporal branch.