Idioma:

Sensations and reaction times evoked by electrical sinusoidal stimulation

Félix, E.P.V ; Giuliano, L.M.P ; Tierra-Criollo, C.J ; Gronich, G ; Braga, N.I.O ; Peres, C.A ; Nóbrega, J.A.M ; Manzano, G.M

Neurophysiologie clinique, 2009-12, Vol.39 (6), p.283-290 [Periódico revisado por pares]

Paris: Elsevier SAS

Texto completo disponível

Citações Citado por

Enviar para

Título:
Sensations and reaction times evoked by electrical sinusoidal stimulation
Autor: Félix, E.P.V ; Giuliano, L.M.P ; Tierra-Criollo, C.J ; Gronich, G ; Braga, N.I.O ; Peres, C.A ; Nóbrega, J.A.M ; Manzano, G.M
Assuntos: Adolescent ; Adult ; Biological and medical sciences ; Courant électrique ; Electric current ; Electric Stimulation - adverse effects ; Electric Stimulation - methods ; Electrodiagnosis. Electric activity recording ; Female ; Fibres nerveuses sensitives ; Humans ; Investigative techniques, diagnostic techniques (general aspects) ; Male ; Medical sciences ; Middle Aged ; Nerve Fibers, Myelinated - physiology ; Nerve Fibers, Unmyelinated - physiology ; Nervous system ; Neurology ; Pain ; Pain - etiology ; Pain - physiopathology ; Paresthesia - etiology ; Paresthesia - physiopathology ; Perception ; Perceptions ; Pressure ; Reaction Time ; Reaction times ; Reference Values ; Sensations ; Sensory fibers ; Sensory Thresholds ; Temps de réaction ; Touch - physiology ; Vibration ; Young Adult
É parte de: Neurophysiologie clinique, 2009-12, Vol.39 (6), p.283-290
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ObjectType-Article-2
ObjectType-Feature-1
Descrição: Summary Objective To determine whether 5 Hz and 2000 Hz sinusoidal electric currents evoke different sensations and to indirectly evaluate which peripheral nerve fibers are stimulated by these different frequencies. Methods One hundred and fifty subjects chose three among eight descriptors of sensations evoked by 5 Hz and 2000 Hz currents and the results were submitted to factor analysis. In 20 subjects, reaction times to 5, 250 and 2000 Hz currents were determined at 1.1x ST and reaction times to 5 Hz currents were also determined at 2x ST. Results Responses were grouped in four factors: Factor 1, which loaded mainly in descriptors related to tweezers stimulation, was higher than the other factors during 2000 Hz stimulation at 1.5x ST. Factor 2, which loaded mainly in descriptors related to needle stimulation, was higher than the other factors during 5 Hz stimulation. Factor 1 increased and Factor 2 decreased with an increase in 5 Hz intensity from 1.5 to 4x ST. Reaction times measured from the fastest responses were significantly different: 0.57 s (0.16 to 1.60), 0.34 s (0.12 to 0.71) and 0.22 s (0.08 to 0.35) for 5, 250 and 2000 Hz, respectively, and 0.22 s (0.11 to 0.34) for 5 Hz at 2x ST. Conclusions Sinusoidal electrical stimulation of 5 Hz and 2000 Hz evoke different sensations. At juxta-threshold intensities, RT measurements suggest that 2000 Hz stimulates Aβ-fibers, 250 Hz Aβ- or A∂-fibers, 5 Hz Aβ-, A∂- or C-fibers. The fiber type, which was initially stimulated by the lower frequencies, depended on inter-individual differences.
Editor: Paris: Elsevier SAS
Idioma: Inglês

Links

Voltar para lista de resultados

Realização: Logos de Redes Sociais:

Sensations and reaction times evoked by electrical sinusoidal stimulation

Félix, E.P.V ; Giuliano, L.M.P ; Tierra-Criollo, C.J ; Gronich, G ; Braga, N.I.O ; Peres, C.A ; Nóbrega, J.A.M ; Manzano, G.M

Paris: Elsevier SAS

Buscando em bases de dados remotas. Favor aguardar.