Visual coding in locust photoreceptors.

Information capture by photoreceptors ultimately limits the quality of visual processing in the brain. Using conventional sharp microelectrodes, we studied how locust photoreceptors encode random (white-noise, WN) and naturalistic (1/f stimuli, NS) light patterns in vivo and how this coding changes...

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Autores principales:	Olivier Faivre, Mikko Juusola
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2008
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/97fc61fc458d4fa4a47b5c118b866976
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spelling	oai:doaj.org-article:97fc61fc458d4fa4a47b5c118b8669762021-11-25T06:12:26ZVisual coding in locust photoreceptors.1932-620310.1371/journal.pone.0002173https://doaj.org/article/97fc61fc458d4fa4a47b5c118b8669762008-05-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18478123/?tool=EBIhttps://doaj.org/toc/1932-6203Information capture by photoreceptors ultimately limits the quality of visual processing in the brain. Using conventional sharp microelectrodes, we studied how locust photoreceptors encode random (white-noise, WN) and naturalistic (1/f stimuli, NS) light patterns in vivo and how this coding changes with mean illumination and ambient temperature. We also examined the role of their plasma membrane in shaping voltage responses. We found that brightening or warming increase and accelerate voltage responses, but reduce noise, enabling photoreceptors to encode more information. For WN stimuli, this was accompanied by broadening of the linear frequency range. On the contrary, with NS the signaling took place within a constant bandwidth, possibly revealing a 'preference' for inputs with 1/f statistics. The faster signaling was caused by acceleration of the elementary phototransduction current--leading to bumps--and their distribution. The membrane linearly translated phototransduction currents into voltage responses without limiting the throughput of these messages. As the bumps reflected fast changes in membrane resistance, the data suggest that their shape is predominantly driven by fast changes in the light-gated conductance. On the other hand, the slower bump latency distribution is likely to represent slower enzymatic intracellular reactions. Furthermore, the Q(10)s of bump duration and latency distribution depended on light intensity. Altogether, this study suggests that biochemical constraints imposed upon signaling change continuously as locust photoreceptors adapt to environmental light and temperature conditions.Olivier FaivreMikko JuusolaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 3, Iss 5, p e2173 (2008)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Olivier Faivre Mikko Juusola Visual coding in locust photoreceptors.
description	Information capture by photoreceptors ultimately limits the quality of visual processing in the brain. Using conventional sharp microelectrodes, we studied how locust photoreceptors encode random (white-noise, WN) and naturalistic (1/f stimuli, NS) light patterns in vivo and how this coding changes with mean illumination and ambient temperature. We also examined the role of their plasma membrane in shaping voltage responses. We found that brightening or warming increase and accelerate voltage responses, but reduce noise, enabling photoreceptors to encode more information. For WN stimuli, this was accompanied by broadening of the linear frequency range. On the contrary, with NS the signaling took place within a constant bandwidth, possibly revealing a 'preference' for inputs with 1/f statistics. The faster signaling was caused by acceleration of the elementary phototransduction current--leading to bumps--and their distribution. The membrane linearly translated phototransduction currents into voltage responses without limiting the throughput of these messages. As the bumps reflected fast changes in membrane resistance, the data suggest that their shape is predominantly driven by fast changes in the light-gated conductance. On the other hand, the slower bump latency distribution is likely to represent slower enzymatic intracellular reactions. Furthermore, the Q(10)s of bump duration and latency distribution depended on light intensity. Altogether, this study suggests that biochemical constraints imposed upon signaling change continuously as locust photoreceptors adapt to environmental light and temperature conditions.
format	article
author	Olivier Faivre Mikko Juusola
author_facet	Olivier Faivre Mikko Juusola
author_sort	Olivier Faivre
title	Visual coding in locust photoreceptors.
title_short	Visual coding in locust photoreceptors.
title_full	Visual coding in locust photoreceptors.
title_fullStr	Visual coding in locust photoreceptors.
title_full_unstemmed	Visual coding in locust photoreceptors.
title_sort	visual coding in locust photoreceptors.
publisher	Public Library of Science (PLoS)
publishDate	2008
url	https://doaj.org/article/97fc61fc458d4fa4a47b5c118b866976
work_keys_str_mv	AT olivierfaivre visualcodinginlocustphotoreceptors AT mikkojuusola visualcodinginlocustphotoreceptors
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Visual coding in locust photoreceptors.

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