منابع مشابه
Far-field potentials generated by action potentials of isolated frog sciatic nerves in a spherical volume.
Previous results in cylindrical volumes have shown that action potentials generate far-field potentials when experimental conditions are such that quadrupolar components of the action potential are reduced to an equivalent dipole. We now show that the same conclusions are also reached within a spherical volume, again recording far-field potentials from isolated bullfrog nerves. A mathematical p...
متن کاملFar-field potentials recorded from action potentials and from a tripole in a hemicylindrical volume.
There is growing evidence in support of the hypothesis that far-field potentials are recorded when action potentials encounter discontinuities in the surrounding volume. The present study found further support for this hypothesis using two methods of experimentation. The first method recorded potentials when the action potential from an isolated bullfrog sciatic nerve in a hemicylindrical volum...
متن کاملFar-field responses of acoustic brain stem potentials in the thalamus and the subthalamic area.
Short latency evoked potentials in response to acoustic stimulation can be recorded from the thalamus and the subthalamus during stereotactic surgery for relief of intractable pain or tremor. The wave shape, polarity, amplitude and latencies of such responses do not change in wave I-V (wave VI and VII are exceptions) with different electrode positions from the cortical surface to the subthalami...
متن کاملFar-field potentials due to action potentials traversing curved nerves, reaching cut nerve ends, and crossing boundaries between cylindrical volumes.
A previously published computer simulation was tested in a biological preparation by recording action potentials from frog sciatic nerves within a volume conductor filled with Ringer's solution. Traveling in a straight line, nerve action potentials traversed a constricted cylinder before crossing into a larger, hemicylindrical volume. Recordings from widely spaced electrodes in the larger volum...
متن کاملFar - Field Optical Nanoscopy
37. E. Evans, Annu. Rev. Biophys. Biomol. Struct. 30, 105 (2001). 38. G. I. Bell, Science 200, 618 (1978). 39. For adhesive interactions important in soft tissues and organs of eukaryotic cell systems, the average times toff° reported for spontaneous dissociation of ligand/receptor bonds range from a fraction of a second to 100 s or more. 40. Because of thermal activation, the appropriate unit ...
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ژورنال
عنوان ژورنال: Clinical Neurophysiology
سال: 2019
ISSN: 1388-2457
DOI: 10.1016/j.clinph.2019.06.128