Results 261 to 270 of about 285,147 (300)

Neurotrophic Modulation of Motor Neuron Development

The Neuroscientist, 2008
Neurotrophic factors (NTFs) are a pleiotropic group of secreted growth factors that regulate multiple aspects of neuronal development, including the regressive event of cell death. Skeletal muscleinnervating lower motoneurons (MNs) of the brain stem and spinal cord comprise one population of central neurons in which programmed cell death (PCD) during ...
Thomas W, Gould, Hideki, Enomoto
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Peptide Hormone Modulation of a Neuronally Modulated Motor Circuit

Journal of Neurophysiology, 2007
Rhythmically active motor circuits are influenced by neuronally released and circulating hormone modulators, but there are few systems in which the influence of a peptide hormone modulator on a neuronally modulated motor circuit has been determined.
Matthew S, Kirby, Michael P, Nusbaum
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Motor-gear linkage in a motor-transmission module

Russian Engineering Research, 2010
Recommendations are made regarding the design of the motor-gear link in an integrated motor-transmission system. Algorithms are presented for calculating a cylindrical involute gear transmission with a small number of pinion teeth, the glued joint of the pinion with the gear system’s input shaft, and the pinion body.
A. S. Ivanov, S. V. Murkin
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Pulsewidth Modulated Inverter Motor Drives with Improved Modulation

IEEE Transactions on Industry Applications, 1975
The performance of inverter drives, which use the pulsewidth modulated (PWM) technique to control motor applied voltage and frequency, are critically influenced by the choice of the modulation policy used in the control circuits. This paper deals with practical inverter drives for squirrel cage induction motors and presents some basic considerations on
Jacob Zubek, Alberto Abbondanti, Craig J. Norby   +2 more
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Stability limits modulate whole-body motor learning

Journal of Neurophysiology, 2012
Our daily movements exert forces upon the environment and also upon our own bodies. To control for these forces, movements performed while standing are usually preceded by anticipatory postural adjustments (APAs). This strategy is effective at compensating for an expected perturbation, as it reduces the need to compensate for the perturbation in a ...
Gregory C, Manista, Alaa A, Ahmed
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Diaphragm afferent modulation of phrenic motor drive

Journal of Applied Physiology, 1987
Experiments were performed in eight lightly anesthetized thiopental sodium (Pentothal) cats to examine whether diaphragmatic afferents can significantly alter the neural drive to the diaphragm when the animal is exposed to lower body negative pressure.
D L, Fryman, D T, Frazier
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Modulation of somatosensory perception by motor intention

Cognitive Neuroscience, 2011
The intention to execute a movement can modulate our perception of sensory events; however, theoretical accounts of these effects, and also empirical data, are often contradictory. We investigated how perception of a somatosensory stimulus differed according to whether it was delivered to a limb being prepared for movement or to a nonmoving limb.
Parkinson, A., Plukaard, S., Pears, S., Newport, R., Dijkerman, H.C., Jackson, S.R.   +5 more
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Serotonergic modulation of locust motor neurons

Journal of Neurophysiology, 1995
1. The effects of the putative endogenous neuromodulator serotonin (5-HT) on the fast extensor and flexor tibiae motor neurons in the locust (Schistocerca gregaria) metathoracic ganglion, were analyzed. 2. 5-HT consistently increased the duration of the fast extensor spike and usually reduced the afterhyperpolarization, although this effect was less ...
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Robotic endoscope motor module and gearing design

2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011
Actuation of a robotic endoscope with increased torque output is presented. This paper will specifically focus on the motor module section of a robotic endoscope, which comprises of a pair of motors and gear reduction assemblies. The results for the endoscope and biopsy tool stiffness, as well as the stall force and force versus speed characteristics ...
Jillian M, Oliveira, Yi, Chen, Ian W, Hunter   +2 more
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Effector-specific motor activation modulates verb production

Neuroscience Letters, 2012
Language comprehension studies have demonstrated that effector-specific activation of the motor system supports the representation of word meaning. The aim of the present study was to test whether motor activation is also relevant for verb production.
Gerrit, Hirschfeld, Pienie, Zwitserlood
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