Sarah Laxhmi Chellappa
Overview
Explore the profile of Sarah Laxhmi Chellappa including associated specialties, affiliations and a list of published articles.
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11
Citations
365
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Recent Articles
1.
Cajochen C, Reichert C, Munch M, Gabel V, Stefani O, Chellappa S, et al.
Sleep Health
. 2023 Nov;
10(1S):S52-S62.
PMID: 37914631
Objective: Sleep varies between individuals in response to sleep-wake history and various environmental factors, including light and noise. Here we report on the intranight variation of the ultradian nonrapid eye...
2.
Chellappa S, Ly J, Meyer C, Balteau E, Degueldre C, Luxen A, et al.
Proc Natl Acad Sci U S A
. 2014 Mar;
111(16):6087-91.
PMID: 24616488
Light is a powerful stimulant for human alertness and cognition, presumably acting through a photoreception system that heavily relies on the photopigment melanopsin. In humans, evidence for melanopsin involvement in...
3.
Chellappa S, Cajochen C
Int J Psychophysiol
. 2013 Mar;
89(2):165-70.
PMID: 23524011
Dreaming occurs during non-rapid eye movement (NREM) and rapid eye movement (REM) sleep, which both are regulated by homeostatic, ultradian, and circadian processes. However, the magnitude of how ultradian REM...
4.
Birchler-Pedross A, Frey S, Chellappa S, Gotz T, Brunner P, Knoblauch V, et al.
Sleep
. 2011 Dec;
34(12):1699-706.
PMID: 22131608
Study Objectives: Major depressive disorder (MDD) is often associated with disturbances in circadian and/or sleep-wake dependent processes, which both regulate daytime energy and sleepiness levels. Design: Analysis of continuous electroencephalographic...
5.
Chellappa S, Gordijn M, Cajochen C
Prog Brain Res
. 2011 May;
190:119-33.
PMID: 21531248
Light elicits robust nonvisual effects on numerous physiological and behavioral variables, such as the human sleep-wake cycle and cognitive performance. Light effects crucially rely on properties such as dose, duration,...
6.
Chellappa S, Frey S, Knoblauch V, Cajochen C
Biol Psychol
. 2011 Mar;
87(2):251-6.
PMID: 21419827
Dreaming pertains to both REM and NREM sleep. However, frequency and regional specific differences in EEG activity remains controversial. We investigated NREM and REM sleep EEG power density associated with...
7.
Chellappa S, Steiner R, Blattner P, Oelhafen P, Gotz T, Cajochen C
PLoS One
. 2011 Feb;
6(1):e16429.
PMID: 21298068
Background: Light exposure can cascade numerous effects on the human circadian process via the non-imaging forming system, whose spectral relevance is highest in the short-wavelength range. Here we investigated if...
8.
Chellappa S, Munch M, Blatter K, Knoblauch V, Cajochen C
Sleep
. 2009 Sep;
32(9):1201-9.
PMID: 19750925
Study Objectives: The ultradian NREM-REM sleep cycle and the circadian modulation of REM sleep sum to generate dreaming. Here we investigated age-related changes in dream recall, number of dreams, and...
9.
Chellappa S, Schroder C, Cajochen C
Sleep Med
. 2008 Oct;
10(5):505-14.
PMID: 18824409
The complaint of excessive daytime sleepiness (EDS), commonly encountered in clinical practice, may arise from a variety of psychiatric disorders, most importantly depression. Even though EDS frequently leads depressed patients...
10.
Chellappa S, Araujo J
Psychiatry Res
. 2007 Jul;
153(2):131-6.
PMID: 17658614
An intrinsic association between suicidal ideation and sleep disorders in patients with depressive disorder has been observed in recent studies. This study was conducted in order to examine the relationship...