Motor unit recruitment strategies and muscle properties determine the influence of synaptic noise on force steadiness.

abstract：:Gaze is the position of the visual axis in space and is the sum of the eye movement relative to the head plus head movement relative to space. In monkeys, a gaze shift is programmed with a single saccade that will, by itself, take the eye to a target, irrespective of whether the head moves. If the head turns simultane...

journal_title：Journal of neurophysiology

authors： Guitton D,Douglas RM,Volle M

更新日期：1984-12-01 00:00:00

abstract：:Voluntary and stimulus-driven shifts of attention can modulate the representation of behaviorally relevant stimuli in early areas of visual cortex. In turn, attended items are processed faster and more accurately, facilitating the selection of appropriate behavioral responses. Information processing is also strongly i...

journal_title：Journal of neurophysiology

authors： Serences JT,Saproo S

更新日期：2010-07-01 00:00:00

abstract：:Interneuron precursors transplanted into visual cortex induce network plasticity during their heterochronic maturation. Such plasticity can have a significant impact on the function of the animal and is normally present only during a brief critical period in early postnatal development. Elucidating the synaptic and ph...

journal_title：Journal of neurophysiology

authors： Larimer P,Spatazza J,Stryker MP,Alvarez-Buylla A,Hasenstaub AR

更新日期：2017-07-01 00:00:00

abstract：:The cardiac ganglion (CG) of Homarus americanus is a central pattern generator that consists of two oscillatory groups of neurons: "small cells" (SCs) and "large cells" (LCs). We have shown that SCs and LCs begin their bursts nearly simultaneously but end their bursts at variable phases. This variability contrasts wit...

journal_title：Journal of neurophysiology

authors： Williams AH,Kwiatkowski MA,Mortimer AL,Marder E,Zeeman ML,Dickinson PS

更新日期：2013-05-01 00:00:00

abstract：:Feedback control of our limbs must account for the unexpected offset of mechanical perturbations. Here we examine the evoked activity of elbow flexor and extensor muscles to torque pulses lasting 22-152 ms and how torque offset impacts activity in the long-latency (45-100 ms) and voluntary epochs (120-180 ms). For eac...

journal_title：Journal of neurophysiology

authors： Kurtzer I,Pruszynski JA,Scott SH

更新日期：2010-06-01 00:00:00

abstract：:Long-term synaptic depression (LTD) of cerebellar parallel fiber-Purkinje cell synapses is a form of use-dependent synaptic plasticity that may be studied in cell culture. One form of LTD is induced postsynaptically through an mGlu1/Ca influx/protein kinase Cα (PKCα) cascade, and its initial expression requires phosph...

journal_title：Journal of neurophysiology

authors： Linden DJ

更新日期：2012-01-01 00:00:00

abstract：:Motor performance induces a postexercise increase in corticomotor excitability that may be associated with motor learning. We investigated whether there are hemispheric differences in the extent and/or time course of changes in corticomotor excitability following a manipulation task (Purdue pegboard) and their relatio...

journal_title：Journal of neurophysiology

authors： Garry MI,Kamen G,Nordstrom MA

更新日期：2004-04-01 00:00:00

abstract：:The dependence of the form of the EMG-force relation on key motoneuron and muscle properties was explored using a simulation approach. Surface EMG signals and isometric forces were simulated using existing motoneuron pool, muscle force, and surface EMG models, based primarily on reported properties of the first dorsal...

journal_title：Journal of neurophysiology

authors： Zhou P,Rymer WZ

更新日期：2004-11-01 00:00:00

abstract：:1. The modulation of the voltage-activated Ca2+ current by the neuropeptide Phe-Met-Arg-Phe-NH2 (FMRFa) was investigated in dissociated central neurons from Helix aspersa using whole-cell voltage-clamp recording techniques. External Ba2+ was always used as the charge carrier in this study, and the intracellular Ca2+ c...

journal_title：Journal of neurophysiology

authors： Yakel JL

更新日期：1991-06-01 00:00:00

abstract：:The medial division of the ventral nucleus of the lateral lemniscus (VNLLm) contains a specialized population of neurons that is sensitive to interaural temporal disparities (ITDs), a potent cue for sound localization along the azimuth. Unlike many ITD-sensitive neurons elsewhere in the auditory system, neurons in the...

journal_title：Journal of neurophysiology

authors： Batra R,Fitzpatrick DC

更新日期：2002-08-01 00:00:00

abstract：:1. Using floating electrodes, we recorded from neck-muscle spindle afferents in the C2 dorsal root ganglion of the decerebrate cat. Nerves to dorsal neck muscles were cut so that the afferents presumably originated mainly from ventral and ventrolateral perivertebral muscles and sternocleidomastoid. One goal of our exp...

journal_title：Journal of neurophysiology

authors： Kasper J,Wilson VJ,Yamagata Y,Yates BJ

更新日期：1989-10-01 00:00:00

abstract：:Pathologic reorganization of spinal networks and activity-dependent plasticity are common neuronal adaptations after spinal cord injury (SCI) in humans. In this work, we examined changes of reciprocal Ia and nonreciprocal Ib inhibition after locomotor training in 16 people with chronic SCI. The soleus H-reflex depress...

journal_title：Journal of neurophysiology

authors： Knikou M,Smith AC,Mummidisetty CK

更新日期：2015-04-01 00:00:00

abstract：:1. We studied the effect of electrical stimulation of the peribrachial region (PBR) in the brain stem on the visual response of single cells in the dorsal lateral geniculate nucleus (dLGN) to a light slit presented in a series of positions across the receptive field. The response was plotted against slit position, giv...

journal_title：Journal of neurophysiology

authors： Hartveit E,Ramberg SI,Heggelund P

更新日期：1993-10-01 00:00:00

abstract：:In this report, we provide the first characterization of abducens nucleus neuron (ABN) discharge dynamics during horizontal disjunctive saccades. These movements function to rapidly transfer the visual axes between targets located at different eccentricities and depths. Our primary objective was to determine whether t...

journal_title：Journal of neurophysiology

authors： Sylvestre PA,Cullen KE

更新日期：2002-12-01 00:00:00

abstract：:The somatosensory temporal discrimination threshold (STDT) has been used in recent years to investigate time processing of sensory information, but little is known about the physiological correlates of somatosensory temporal discrimination. The objective of this study was to investigate whether the time interval requi...

journal_title：Journal of neurophysiology

authors： Leodori G,Formica A,Zhu X,Conte A,Belvisi D,Cruccu G,Hallett M,Berardelli A

更新日期：2017-10-01 00:00:00

abstract：:We hypothesized that epilepsy affects the activity of the autonomic nervous system even in the absence of seizures, which should manifest as differences in heart rate variability (HRV) and cardiac cycle. To test this hypothesis, we investigated ECG traces of 91 children and adolescents with generalized epilepsy and 25...

journal_title：Journal of neurophysiology

authors： Sivakumar SS,Namath AG,Tuxhorn IE,Lewis SJ,Galán RF

更新日期：2016-04-01 00:00:00

abstract：:In experiments on slices (from 100- to 150-g Sprague-Dawley rats) kept at 33 degreesC, we studied the effects of brief hypoxia (2-3 min) on CA1 neurons. In whole cell recordings from submerged slices, with electrodes containing only KMeSO4 and N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid, and in the presence of...

journal_title：Journal of neurophysiology

authors： Erdemli G,Xu YZ,Krnjević K

更新日期：1998-11-01 00:00:00

abstract：:In the oscillatory circuits known as central pattern generators (CPGs), most synaptic connections are inhibitory. We have assessed the effects of inhibitory synaptic input on the dynamic behavior of a component neuron of the pyloric CPG in the lobster stomatogastric ganglion. Experimental perturbations were applied to...

journal_title：Journal of neurophysiology

authors： Elson RC,Huerta R,Abarbanel HD,Rabinovich MI,Selverston AI

更新日期：1999-07-01 00:00:00

abstract：:1. Antidromic stimulation of the visual radiation of cats has been used to investigate the possibility that some of the activity in principal geniculate cells following an optic tract stimulus is antidromic. Single spikes were selected from two classes of poststimulus activity to condition the antidromic test spike--t...

journal_title：Journal of neurophysiology

authors： Rosen AD,Vastola EF

更新日期：1977-01-01 00:00:00

abstract：:The inferior temporal cortex (IT) of the monkey, a final stage in the ventral visual pathway, has been known to process information on two-dimensional (2-D) shape, color, and texture. On the other hand, the dorsal visual pathway leading to the posterior parietal cortex has been known to process information on location...

journal_title：Journal of neurophysiology

authors： Uka T,Tanaka H,Yoshiyama K,Kato M,Fujita I

更新日期：2000-07-01 00:00:00

abstract：:The high variability of cortical sensory responses is often assumed to impose a major constraint on efficient computation. In the auditory cortex, however, response variability can be very low. We have used in vivo whole cell patch-clamp methods to study the trial-to-trial variability of the subthreshold fluctuations ...

journal_title：Journal of neurophysiology

authors： Deweese MR,Zador AM

更新日期：2004-09-01 00:00:00

abstract：:Rectification of surface EMG before spectral analysis is a well-established preprocessing method used in the detection of motor unit firing patterns. A number of recent studies have called into question the need for rectification before spectral analysis, pointing out that there is no supporting experimental evidence ...

journal_title：Journal of neurophysiology

authors： Ward NJ,Farmer SF,Berthouze L,Halliday DM

更新日期：2013-10-01 00:00:00

abstract：:The operculoinsular cortical region has a major role in the representation of noxious stimuli, based on functional imaging observations, clinical lesion studies, and EEG recordings of specifically pain-related laser-evoked potentials (LEPs) in humans. The source of LEPs has not been identified, and several somatic rep...

journal_title：Journal of neurophysiology

authors： Baumgärtner U,Tiede W,Treede RD,Craig AD

更新日期：2006-11-01 00:00:00

abstract：:Horseradish peroxidase- (HRP) filled microelectrodes have been used to examine the anatomy and physiology of "commissural interneurons," a morphologically defined class of spinal cord interneuron in Xenopus laevis embryos. Commissural interneurons have unipolar cell bodies in the dorsal half of the spinal cord. Their ...

journal_title：Journal of neurophysiology

authors： Soffe SR,Clarke JD,Roberts A

更新日期：1984-06-01 00:00:00

abstract：:We observed endocytosis in real time in stimulated frog motor nerve terminals by imaging the growth of large membrane infoldings labeled with a low concentration of FM dye. The spatial and temporal information made available by these experiments allowed us to image several new aspects of this synaptic vesicle recyclin...

journal_title：Journal of neurophysiology

authors： Gaffield MA,Romberg CF,Betz WJ

更新日期：2011-08-01 00:00:00

abstract：:1. Pressure on the skin of the tail base and perineum of female rats in the range of 40--440 millibars, following bilateral contact with the flanks, was adequate to elicit the lordosis reflex. Hair deflection alone or noxious stimulation was neither sufficient nor necessary for lordosis behavior to occur. 2. For a giv...

journal_title：Journal of neurophysiology

authors： Kow LM,Montgomery MO,Pfaff DW

更新日期：1979-01-01 00:00:00

abstract：:Sensory neurons appear to adapt their gain to match the variance of signals along the dimension they encode, a property we shall call "contrast normalization." Contrast normalization has been the subject of extensive physiological and theoretical study. We previously found that neurons in the lateral geniculate nucleu...

journal_title：Journal of neurophysiology

authors： Gaudry KS,Reinagel P

更新日期：2007-09-01 00:00:00

abstract：:The inferior colliculus (IC) is highly modulated by descending projections from higher auditory and nonauditory centers. Traditionally, corticofugal fibers were believed to project mainly to the extralemniscal IC regions. However, there is some anatomical evidence suggesting that a substantial number of fibers from th...

journal_title：Journal of neurophysiology

authors： Lim HH,Anderson DJ

更新日期：2007-02-01 00:00:00

abstract：:1. Effects of substance P (SP) and other tachykinins on membrane currents were investigated using whole cell voltage clamp in cultured sensory neurons isolated from rat dorsal root ganglia. 2. SP (100 nM) evoked an inward current in two-thirds of the cells at negative potentials. In most of the cells that generated th...

journal_title：Journal of neurophysiology

authors： Inoue K,Nakazawa K,Inoue K,Fujimori K

更新日期：1995-02-01 00:00:00

abstract：:Direct electrical coupling between neurons can be the result of both electrotonic current transfer through gap junctions and extracellular fields. Intracellular recordings from CA1 pyramidal neurons of rat hippocampal slices showed two different types of small-amplitude coupling potentials: short-duration (5 ms) bipha...

journal_title：Journal of neurophysiology

authors： Vigmond EJ,Perez Velazquez JL,Valiante TA,Bardakjian BL,Carlen PL

更新日期：1997-12-01 00:00:00