Circadian modulation of photoreception: A study protocol
Author(s) / Creator(s)
Heinrichs, Hannah Sophie
Editor(s)
Spitschan, Manuel
Abstract / Description
Daily variation in our physiology and behavior at the 24-hour scale are governed by two independent processes, an endogenous circadian rhythm and a sleep homeostat. Through the retinohypothalamic pathway, which carries information from the retina, the hypothalamus responds to light in order to synchronize the internal circadian rhythm to the external environment, rendering visual input an important circadian signal. The link between visual signals and the circadian system may be bi-directional, i.e., the sensitivity of the visual system to light may be modulated by the circadian clock itself.
Building upon converging evidence for a of time-of day dependency in image-forming (e.g. luminance perception) and non image-forming functions (e.g. pupillary light response), we will disentangle circadian and homeostatic effects on early stages of visual processing in a pre-registered study. We will use the ultrashort sleep-wake schedule spanning 40 hours with healthy participants (n = 24) staying in a constant dim light environment, and providing repeated measures of ocular structures and functional mechanisms in 3-hour intervals. Our focus will be on assessing photoreceptor sensitivity using silent-substitution pupillometry, and characterising post-receptoral retinal mechanisms underlying luminance and color perception using psychophysical threshold measurements. To estimate circadian phase, we will collect circadian biomarkers, including salivary melatonin and core body temperature.
This study will characterize the circadian and homeostatic influence on retinal mechanisms, informing how daily variations in physiology influence how we process light in the environment.
Keyword(s)
circadian rhythm vision retina sleep psychophysics pupillometryPersistent Identifier
Date of first publication
2023-03-28
Is part of
TeaP Conference 2023, Trier, Germany
Publisher
ZPID (Leibniz Institute for Psychology)
Citation
-
20230324_poster_heinrichs.pdfAdobe PDF - 3.82MBMD5: 42cc2145c47e2391b63d0d8bb8a9c0b9Description: Circadian modulation of photoreception: A study protocol
-
There are no other versions of this object.
-
Author(s) / Creator(s)Heinrichs, Hannah Sophie
-
Editor(s)Spitschan, Manuel
-
PsychArchives acquisition timestamp2023-03-28T18:11:31Z
-
Made available on2023-03-28T18:11:31Z
-
Date of first publication2023-03-28
-
Abstract / DescriptionDaily variation in our physiology and behavior at the 24-hour scale are governed by two independent processes, an endogenous circadian rhythm and a sleep homeostat. Through the retinohypothalamic pathway, which carries information from the retina, the hypothalamus responds to light in order to synchronize the internal circadian rhythm to the external environment, rendering visual input an important circadian signal. The link between visual signals and the circadian system may be bi-directional, i.e., the sensitivity of the visual system to light may be modulated by the circadian clock itself. Building upon converging evidence for a of time-of day dependency in image-forming (e.g. luminance perception) and non image-forming functions (e.g. pupillary light response), we will disentangle circadian and homeostatic effects on early stages of visual processing in a pre-registered study. We will use the ultrashort sleep-wake schedule spanning 40 hours with healthy participants (n = 24) staying in a constant dim light environment, and providing repeated measures of ocular structures and functional mechanisms in 3-hour intervals. Our focus will be on assessing photoreceptor sensitivity using silent-substitution pupillometry, and characterising post-receptoral retinal mechanisms underlying luminance and color perception using psychophysical threshold measurements. To estimate circadian phase, we will collect circadian biomarkers, including salivary melatonin and core body temperature. This study will characterize the circadian and homeostatic influence on retinal mechanisms, informing how daily variations in physiology influence how we process light in the environment.en
-
Publication statusunknownen
-
Review statusunknownen
-
Persistent Identifierhttps://hdl.handle.net/20.500.12034/8170
-
Persistent Identifierhttps://doi.org/10.23668/psycharchives.12641
-
Language of contentengen
-
PublisherZPID (Leibniz Institute for Psychology)en
-
Is part ofTeaP Conference 2023, Trier, Germanyen
-
Keyword(s)circadian rhythmen
-
Keyword(s)visionen
-
Keyword(s)retinaen
-
Keyword(s)sleepen
-
Keyword(s)psychophysicsen
-
Keyword(s)pupillometryen
-
Dewey Decimal Classification number(s)150
-
TitleCircadian modulation of photoreception: A study protocolen
-
DRO typeconferenceObjecten
-
Visible tag(s)ZPID Conferences and Workshops