Results 371 to 380 of about 14,230,890 (402)
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Fast and accurate detection of action potentials from somatic calcium fluctuations.
Journal of Neurophysiology, 2008Large-scale recording from a population of neurons is a promising strategy for approaching the study of complex brain functions. Taking advantage of the fact that action potentials reliably evoke transient calcium fluctuations in the cell body ...
T. Sasaki +3 more
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Action Potential in Charophytes
2007The plant action potential (AP) has been studied for more than half a century. The experimental system was provided mainly by the large charophyte cells, which allowed insertion of early large electrodes, manipulation of cell compartments, and inside and outside media.
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Action Potential of the Motorneuron
IBM Journal of Research and Development, 1973The excitability of various regions of the spinal motorneuron can be specified by solving the partial differential equation of a nerve fiber whose diameter and membrane properties vary with distance. For our model geometrical factors for the myelinated axon, initial segment and cell body were derived from anatomical measurements, the dendritic tree was
F. A. Dodge, J.W. Cooley
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1974
Bernstein (1902, 1912), the founder of the modern membrane theory, regarded the action potential as the “negative wave” of the resting potential. He considered that during stimulation of a nerve or muscle fiber certain chemical changes which give rise to a reversible increase in the ionic permeability of the cell membrane take place at the point of ...
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Bernstein (1902, 1912), the founder of the modern membrane theory, regarded the action potential as the “negative wave” of the resting potential. He considered that during stimulation of a nerve or muscle fiber certain chemical changes which give rise to a reversible increase in the ionic permeability of the cell membrane take place at the point of ...
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New Progestins and Potential Actions
Journal of the Society for Gynecologic Investigation, 2000Newer, nonsteroidal, orally active, tissue-selective progestins are being developed through a molecular approach to compound selection with human progesterone receptor (hPR) serving as the molecular target. The co-transfection and binding assays are used to test receptor selectivity and cross reactivity with a panel of receptors.
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Motor facilitation during action observation: a magnetic stimulation study.
Journal of Neurophysiology, 19951. We stimulated the motor cortex of normal subjects (transcranial magnetic stimulation) while they 1) observed an experimenter grasping 3D-objects, 2) looked at the same 3D-objects, 3) observed an experimenter tracing geometrical figures in the air with
L. Fadiga +3 more
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Anaesthesia & Intensive Care Medicine, 2006
Abstract A recording of membrane potential during an action potential in a myocardial (force-producing) fibre shows a different profile from that in the pacemaker cells. The resting membrane potential in myocardial fibres is constant and considerably more negative.
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Abstract A recording of membrane potential during an action potential in a myocardial (force-producing) fibre shows a different profile from that in the pacemaker cells. The resting membrane potential in myocardial fibres is constant and considerably more negative.
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Evolution of the Action Potential
2007Rapid signaling in the nervous system relies upon generation of action potentials (APs). In order to fire APs, neurons differentiate electrically excitable membrane properties. Study of many neurons indicates that electrical excitability is one of the earliest differentiated properties expressed by embryonic neurons. Further, electrical excitability is
Ricardo H. Pineda, Angeles B. Ribera
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Propagation of the Action Potential
2009There are two types of regenerating nerve fibers: unmyelinated and myelinated. Unmyelinated fibers are generally small (diameter up to 0.0013 mm or 0.00005 in.) and have a slow speed [up to 1.5 meters/second (m/s) or 3.2 mph]. Two-thirds of the fibers in the body are of this type; they are used for chores for which low speed is adequate, such as the ...
Alice Deutsch, Sid Deutsch
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Generation of the Action Potential
2009An axon is a relatively poor conductor, so that a graded potential is severely attenuated after traveling less than a millimeter. A different scheme is used for all long-distance transmission. The graded potential is translated into a series of voltage spikes, called action potentials (APs), each 100 mV high, that are continually regenerated.
Alice Deutsch, Sid Deutsch
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