92.28.8.74: /* Uses */ Improved vastly

2013-02-28T10:55:51Z

Uses: Improved vastly

← Older revision		Revision as of 12:55, 28 February 2013
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	~~Nice~~ to ~~meet you~~, ~~my name~~ is ~~Refugia~~. ~~South Dakota~~ is ~~her birth location but she requirements~~ to ~~move simply because~~ of ~~her family members~~. ~~She is~~ a ~~librarian but she~~'~~s usually needed her own company~~. ~~Body building is what my family~~ and ~~I appreciate~~.<br><br>~~My web~~-~~site :: std testing~~ at ~~home~~ ([http://www.~~beasts-of-america~~.~~com~~/~~beasts~~/~~groups~~/~~curing-your-candida-how-to-do-it-easily~~/ ~~redirected here~~])		In [[neurophysiology]], '''peristimulus time histogram''' and '''poststimulus time histogram''', both abbreviated '''PSTH''' or '''PST histogram''', are [[histogram]]s of the times at which neurons fire. These histograms are used to visualize the rate and timing of neuronal spike discharges in relation to an external stimulus or event. The peristimulus time histogram is sometimes called '''perievent time histogram''', and ''post-stimulus'' and ''peri-stimulus'' are often [[hyphen]]ated.

			The prefix ''peri,'' for ''through,'' is typically used in the case of periodic stimuli, in which case the PSTH show neuron firing times wrapped to one cycle of the stimulus. The prefix ''post'' is used when the PSTH shows the timing of neuron firings in response to a stimulus event or onset.<ref>{{cite book \| title = Introduction to Electrophysiological Methods and Instrumentation \| author = Franklin Bretschneider and Jan R. De Weille \| url = http://books.google.com/?id=2ybw9UoRVBUC&pg=PA188&dq=peri-stimulus-time-histogram+post-stimulus-time-histogram \| publisher = Academic Press \| isbn = 0-12-370588-6 \| year = 2006 }}</ref>

			To make a PSTH, a spike train recorded from a single neuron is aligned with the onset, or a fixed phase point, of an identical stimulus repeatedly presented to an animal. The aligned sequences are superimposed in time, and then used to construct a histogram.<ref>{{cite journal
			\| last =Palm
			\| first =G.
			\| authorlink =
			\| coauthors =Aertsen, A. M.; Gerstein, G. L.
			\| title =On the significance of correlations among neuronal spike trains
			\| journal =Biological Cybernetics
			\| volume =59
			\| issue =1
			\| pages =1–11
			\| publisher =
			\| date =1988
			\| doi =10.1007/BF00336885
			\| id =
			\| accessdate =
			\| pmid =3401513 }}
			</ref>

			== Construction procedure ==

			# Align spike sequences with the onset of stimuli that repeated ''n'' times. For periodic stimuli, wrap the response sequence back to time zero after each time period ''T'', and count ''n'' as the total number of periods of data.
			# Divide the stimulus period or observation period ''T'' into ''N'' bins of size <math>\Delta</math>.
			# Count the number of spikes ''k<sub>i</sub>'' from all ''n'' sequences that fall in the bin ''i''.
			# Draw a bar-graph histogram with the bar-height of bin ''i'' given by <math>\frac{k_i}{n \Delta}</math> in units of estimated spikes per second at time <math>i\ \Delta</math>.

			The optimal bin size Δ is a minimizer of the formula, (2k-v)/Δ<sup>2</sup>,
			where k and v are mean and variance of k<sub>i</sub>.
			<ref>{{cite journal
			\| last = Shimazaki
			\| first =H.
			\| authorlink =
			\| coauthors =Shinomoto, S.
			\| title =A method for selecting the bin size of a time histogram
			\| journal = Neural Computation
			\| volume =19
			\| issue = 6
			\| pages =1503–152
			\| publisher =
			\| date =2007
			\| url = http://www.mitpressjournals.org/doi/abs/10.1162/neco.2007.19.6.1503
			\| doi = 10.1162/neco.2007.19.6.1503
			\| pmid = 17444758 }}
			</ref>

			== References ==

			{{reflist}}

			[[Category:Neurophysiology]]

en>Omnipaedista: /* The Siegel-Shidlovsky theorem */

2011-02-03T11:00:59Z

The Siegel-Shidlovsky theorem

New page

Nice to meet you, my name is Refugia. South Dakota is her birth location but she requirements to move simply because of her family members. She is a librarian but she's usually needed her own company. Body building is what my family and I appreciate.<br><br>My web-site :: std testing at home ([http://www.beasts-of-america.com/beasts/groups/curing-your-candida-how-to-do-it-easily/ redirected here])

E-function - Revision history

92.28.8.74: /* Uses */ Improved vastly

en>Omnipaedista: /* The Siegel-Shidlovsky theorem */