Corticofugal Modulation of Tactile Responses of Neurons in the Spinal Trigeminal Nucleus: A Wavelet Coherence Study
Eduardo Malmierca (Universidad Autónoma de Madrid, Spain), Nazareth P. Castellanos (Universidad Complutense de Madrid, Spain), Valeri A. Makarov (Universidad Complutense de Madrid, Spain) and Angel Nuñez (Universidad Autónoma de Madrid, Spain)
Copyright: © 2009
It is well know the temporal structure of spike discharges is crucial to elicit different types of neuronal plasticity. Also, precise and reproducible spike timing is one of the alternatives of the sensory stimulus encoding. This chapter studies a new mathematical analysis of the temporal structure of neuronal responses during tactile stimulation of the spinal trigeminal nucleus. We have applied the coherence analysis and the wavelet based approach for quantification of the functional stimulus - neural response coupling. We apply this mathematical tool to analyze the decrease of tactile responses of trigeminal neurons during the simultaneous application of a novel tactile stimulation outside of the neuronal receptive field (sensory-interference). These data suggest the existence of an attentional filter at this early stage of sensory processing.