The afferents of 48 of the 52 club-like endings were associated with axon terminals; the remaining 4 neurons demonstrated the convergence of two axon terminals arranged side-by-side into one afferent fiber
The appearance of some axons exiting the main fiber tracts and exhibiting expanded growth cones suggests that afferent fiber
extension was still underway [ILLUSTRATION FOR FIGURE 1I OMITTED].
Although the signal-to-noise ratio of primary afferent fiber
responses to EOD appears to be low when compared to that generated by ventilation, these fibers have a high, steady rate of resting activity and, in these experiments, are being strongly modulated by the fish's ventilatory potentials.
Interestingly, AF occurs with the stimulation at the wrist level (mixed-nerve stimulation) of the median nerve but is not seen with the stimulation of skin branches (digital nerve) from the second finger This may suggest that this facilitation occurs through thick afferent fibers
stemming from muscle spindles (51,53).
Under physiological conditions, potentially harmful stimuli are integrated by the nociceptors of primary afferent fibers
and relayed for final processing in the supraspinal centers.
Prior scientific evidence shows that when the active device stimulates the afferent fibers
of the vagus nerve, there is a rapid and sustained change in brain chemistry characterized by the release of inhibitory neurotransmitters, and a decrease in the over-expression of the excitatory neurotransmitter glutamate.
Somatosympathetic reflexes: afferent fibers
, central pathways, discharge characteristics.
Botulinum toxin A modulates afferent fibers
in neurogenic detrusor overactivity," European Journal of Neurology, vol.