Preliminary evidence for a change in spectral sensitivity of the circadian system at night |
| |
Authors: | Mariana?G?Figueiro John?D?Bullough Robert?H?Parsons Email author" target="_blank">Mark?S?ReaEmail author |
| |
Institution: | (1) Lighting Research Center, Rensselaer Polytechnic Institute, 21 Union Street, Troy, NY 12180, USA;(2) Department of Biology, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA |
| |
Abstract: | Background It is well established that the absolute sensitivity of the suprachiasmatic nucleus to photic stimulation received through
the retino-hypothalamic tract changes throughout the 24-hour day. It is also believed that a combination of classical photoreceptors
(rods and cones) and melanopsin-containing retinal ganglion cells participate in circadian phototransduction, with a spectral
sensitivity peaking between 440 and 500 nm. It is still unknown, however, whether the spectral sensitivity of the circadian
system also changes throughout the solar day. Reported here is a new study that was designed to determine whether the spectral
sensitivity of the circadian retinal phototransduction mechanism, measured through melatonin suppression and iris constriction,
varies at night. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|