T-shaped cells of dorsal ganglia can influence the pattern of afferent discharge
G Tagini, E Camino - Pflügers Archiv, 1973 - Springer
G Tagini, E Camino
Pflügers Archiv, 1973•SpringerWhen the sensory fibres in “Rana Esculenta” are stimulated with trains of square pulses,
having a duration of 100 μsec, with frequencies between 20 and 100 Hz, the T-shaped cells
of spinal ganglia (which are electrically excitable and respond to low frequency stimulation
producing an action potential) are progressively affected by fatigue. For this reason the
cellular spike (S spike) is generated with an increasing delay after the non-myelinated (NM
spike) and myelinated (M spike) component of the action potential. In the fibre very often a …
having a duration of 100 μsec, with frequencies between 20 and 100 Hz, the T-shaped cells
of spinal ganglia (which are electrically excitable and respond to low frequency stimulation
producing an action potential) are progressively affected by fatigue. For this reason the
cellular spike (S spike) is generated with an increasing delay after the non-myelinated (NM
spike) and myelinated (M spike) component of the action potential. In the fibre very often a …
Summary
When the sensory fibres in “Rana Esculenta” are stimulated with trains of square pulses, having a duration of 100 μsec, with frequencies between 20 and 100 Hz, the T-shaped cells of spinal ganglia (which are electrically excitable and respond to low frequency stimulation producing an action potential) are progressively affected by fatigue. For this reason the cellular spike (S spike) is generated with an increasing delay after the non-myelinated (NM spike) and myelinated (M spike) component of the action potential.
In the fibre very often a new spike becomes evident, under such stimulation modes, in addition to the action potential generated by the external stimulus. This one follows the former with a varying delay, depending on the position of the microelectrode in respect to the ganglion.
The second impulse, when it appears, shows similar characteristics to those of the retarded cellular spike, under conditions of fatigue, both as regards the frequency values at which it appears and the intermittance of the response.
Assuming that the second spike could be attributed to an influence of the soma, we have developed a series of experiments in order to verify this assumption.
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