Letter to NeuroscienceSensory information processing in the dorsal column nuclei by neuronal oscillators
Section snippets
Acknowledgements
This work was supported by a CICYT Grant (SAF96-0031).
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Contribution of different somatosensory afferent input to subcortical somatosensory evoked potentials in humans
2021, Clinical NeurophysiologyLow- and high-frequency subcortical SEP amplitude reduction during pure passive movement
2015, Clinical NeurophysiologyCitation Excerpt :It is conceivable that HFOs depend on intrinsic oscillatory properties of a neuronal network in cuneate nucleus, which can be triggered by inputs ascending though the dorsal column fibers and by corticofugal inputs descending within the pyramidal tract (Insola et al., 2010). It has been recently argued that the cuneate nucleus neuron oscillatory activity may contribute to the synchronization of cells with the same receptive field and that this synchronization is required to process the sensory information (Panetsos et al., 1998). Also the HFO bursts recorded from STN nucleus possibly represent far-field activity generated within the cuneate nucleus (Insola et al., 2014).
Low and high-frequency somatosensory evoked potentials recorded from the human pedunculopontine nucleus
2014, Clinical NeurophysiologyCitation Excerpt :Recently, it has been introduced as a novel target for deep brain stimulation (DBS) in movement disorders (Mazzone et al., 2005b, 2008, 2009a, 2011, 2013; Jenkinson et al., 2005; Plaha and Gill, 2005; Stefani et al., 2007; Lozano and Snyder, 2008; Zrinzo et al., 2008). Although the therapeutic benefits of PPTg DBS are not yet definitely elucidated, motor symptoms, in particular freezing of gait and axial disturbances, can be improved (Ferraye et al., 2010; Follett and Torres-Russotto, 2012; Hazrati et al., 2012; Moro et al., 2010; Ostrem et al., 2010; Peppe et al., 2010; Mazzone et al., 2011, 2012, 2013; Thevathasan et al., 2011a,b; Wilcox et al., 2011). Implanted lead in the PPTg area may be used to record the somatosensory evoked potentials (SEPs), possibly generated within deep cerebral structures difficult to be investigated by using surface electrodes, such as the medial lemniscus (Hanajima et al., 2006; Insola et al., 2008).
Single unit oscillations in rat trigeminal nuclei and their control by the sensorimotor cortex
2010, NeuroscienceCitation Excerpt :Corticonuclear control is likely mediated by the dense topographic corticonuclear projections to the septa between single-whisker representations in Sp5i (versus the moderately abundant projections to Pr5 and limited projections to Sp5o) via inhibition of the multivibrissa local circuit neurons Jacquin et al. (1990). Indeed, the synchronous activity observed throughout the trigeminal pathway (Nicolelis et al., 1995), the persistence of oscillatory activity in DCN after aspiration of the sensorimotor cortex (Panetsos et al., 1998) and the effects of corticonuclear projections to Sp5i (Jacquin et al., 1990) all suggest some sort of direct control, but not the generation of such activity, by cortex. A large fraction of the persistent (non stimulus-generated) activity observed after removal of the cortical input was below 10 Hz.
Effect of movement on SEPs generated by dorsal column nuclei
2010, Clinical NeurophysiologyCitation Excerpt :These data suggest that HFOs are generated by the intrinsic oscillatory properties of a neuronal network in DCN, which must be triggered by inputs ascending though the dorsal column fibers and by corticofugal inputs descending within the pyramidal tract. It has recently been argued that the DCN neuron oscillatory activity may contribute to the synchronization of cells with the same receptive field and that this synchronization is required to process the sensory information (Panetsos et al., 1998). The phenomenon of amplitude reduction of the somatosensory evoked potentials (SEPs) during voluntary movement is commonly known as “gating” (Jones, 1981; Cheron and Borenstein, 1987, 1991; Cohen and Starr, 1987; Jones et al., 1989; Reisin et al., 1989; Rossini et al., 1990; Tinazzi et al., 1997; Touge et al., 1997; Valeriani et al., 1998, 1999, 2001).