Journal: Journal of Neurophysiology

Abbreviation

J. Neurophysiol.

Publisher

American Physiological Society

Journal Volumes

ISSN

1522-1598
0022-3077

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Publications 1 - 10 of 38
  • Neck rotation modulates flexion synergy torques, indicating an ipsilateral reticulospinal source for impairment in stroke
    Item type: Journal Article
    Ellis, Michael D.; Drogos, Justin; Carmona, Carolina; et al. (2012)
    Journal of Neurophysiology
  • Modulation of alpha power at encoding and retrieval tracks the precision of visual short-term memory
    Item type: Journal Article
    Poliakov, E.; Stokes, Mark G.; Woolrich, M.W.; et al. (2014)
    Journal of Neurophysiology
    Our ability to hold information in mind is strictly limited. We sought to understand the relationship between oscillatory brain activity and the allocation of resources within visual short-term memory (VSTM). Participants attempted to remember target arrows embedded among distracters and used a continuous method of responding to report their memory for a cued target item. Trial-to-trial variability in the absolute circular accuracy with which participants could report the target was predicted by event-related alpha synchronization during initial processing of the memoranda and by alpha desynchronization during the retrieval of those items from VSTM. Using a model-based approach, we were also able to explore further which parameters of VSTM-guided behavior were most influenced by alpha band changes. Alpha synchronization during item processing enhanced the precision with which an item could be retained without affecting the likelihood of an item being represented per se (as indexed by the guessing rate). Importantly, our data outline a neural mechanism that mirrors the precision with which items are retained; the greater the alpha power enhancement during encoding, the greater the precision with which that item can be retained.
  • Age-Related Modifications of Muscle Synergies and Spinal Cord Activity During Locomotion
    Item type: Journal Article
    Monaco, Vito; Ghionzoli, Alessio; Micera, Silvestro (2010)
    Journal of Neurophysiology
  • Spike sorting of synchronous spikes from local neuron ensembles
    Item type: Journal Article
    Franke, Felix; Pröpper, Robert; Alle, Henrik; et al. (2015)
    Journal of Neurophysiology
  • Neuromechanics of Muscle Synergies During Cycling
    Item type: Journal Article
    Wakeling, James M.; Horn, Tamara (2009)
    Journal of Neurophysiology
  • Contrast detection is enhanced by deterministic, high-frequency transcranial alternating current stimulation with triangle and sine waveform
    Item type: Journal Article
    Potok, Weronika; van der Groen, Onno; Sivachelvam, Sahana; et al. (2023)
    Journal of Neurophysiology
    Stochastic resonance (SR) describes a phenomenon where an additive noise (stochastic carrier-wave) enhances the signal transmission in a nonlinear system. In the nervous system, nonlinear properties are present from the level of single ion channels all the way to perception and appear to support the emergence of SR. For example, SR has been repeatedly demonstrated for visual detection tasks, also by adding noise directly to cortical areas via transcranial random noise stimulation (tRNS). When dealing with nonlinear physical systems, it has been suggested that resonance can be induced not only by adding stochastic signals (i.e., noise) but also by adding a large class of signals that are not stochastic in nature that cause “deterministic amplitude resonance” (DAR). Here, we mathematically show that high-frequency, deterministic, periodic signals can yield resonance-like effects with linear transfer and infinite signal-to-noise ratio at the output. We tested this prediction empirically and investigated whether nonrandom, high-frequency, transcranial alternating current stimulation (tACS) applied to the visual cortex could induce resonance-like effects and enhance the performance of a visual detection task. We demonstrated in 28 participants that applying 80-Hz triangular-waves or sine-waves with tACS reduced the visual contrast detection threshold for optimal brain stimulation intensities. The influence of tACS on contrast sensitivity was equally effective to tRNS-induced modulation, demonstrating that both tACS and tRNS can reduce contrast detection thresholds. Our findings suggest that a resonance-like mechanism can also emerge when deterministic electrical waveforms are applied via tACS.
  • Biomechanical Models for Radial Distance Determination by the Rat Vibrissal System
    Item type: Journal Article
    Birdwell, J. Alexander; Solomon, Joseph H.; Thajchayapong, Montakan; et al. (2007)
    Journal of Neurophysiology
  • Regulation of learned vocal behavior by an auditory motor cortical nucleus in juvenile zebra finches
    Item type: Journal Article
    Naie, Katja; Hahnloser, Richard H.R. (2011)
    Journal of Neurophysiology
  • Conceptual binding: integrated visual cues reduce processing costs in bimanual movements
    Item type: Journal Article
    Wenderoth, N.; Van Dooren, M.; Vandebroek, A.; et al. (2009)
    Journal of Neurophysiology
  • Depressed responses of facilitatory synapses
    Item type: Journal Article
    Banitt, Yoav; Martin, Kevan A.C.; Segev, Idan (2005)
    Journal of Neurophysiology
Publications 1 - 10 of 38