File:Action potential vert.png
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DescriptionAction potential vert.png |
English: A. Schematic of an electrophysiological recording of an action potential showing the various phases which occur as the wave passes a point on a cell membrane. B. An actual action potential (blue trace) recorded from a mouse hippocampal pyramidal neuron. In this case, the action potential was stimulated by a prolonged pulse of current (brown trace; approx. 2 micro Amps) passed into the cell through the recording electrode. This method of stimulation distorts the AP compared to the schematic, in that the "real" action potential is sitting atop a voltage offset caused by the current pulse. Thus, for example, the "undershoot" is offset from the resting potential, although it would dip below rest if the offset were not present. The slow decline of the membrane potential back toward rest upon the termination of the current pulse reflects the long time constant of the neuronal membrane. |
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Date | 5 July 2005 (original upload date) of Image:Action potential reloaded.jpg | ||||||||
Source | From en:Image:Action potential vert.png; Modified version of older Image:Action potential reloaded.jpg. | ||||||||
Author | Artwork by Synaptidude at en.wikipedia | ||||||||
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Derivative works of this file: Action potential cs.png Image:Action potential reloaded.jpg |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:39, 25 August 2006 | 795 × 1,130 (290 KB) | LeonardoG (talk | contribs) | This image was copied from wikipedia:pt. The original description was: ;'''Descrição:''' Representação esquemático de um potencial deacção. ;'''Fonte e créditos:''' [http://en.wikipedia.org/wiki/Image:Action_potential_vert.png ver] ;'''Licença |
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