Richard Stephenson

Associate Professor


Campus

St. George (downtown)

CSB Appointment

Emeritus

Research Areas

Animal Biology, Neurobiology, Physiology

Education

Ph.D. University of Birmingham 1987
B.Sc. University of Sheffield 1982

Primary Undergraduate Department

Cell & Systems Biology

Graduate Programs

Cell & Systems Biology

Research Description

Regulation and function of sleep


Contact Information

Office Phone: 416-978-3491
Office: RW325C
Lab: RW325/RW327
Lab Phone: 416-946-7237
Email

Mailing Address

Department of Cell & Systems Biology
University of Toronto
25 Harbord St.
Toronto, ON M5S 3G5
Canada


Publications

2013

Statistical properties of sleep-wake behavior in the rat and their relation to circadian and ultradian phases

Stephenson R, Famina S, Caron AM, Lim J
2013, Sleep, 36, 1377-90, 23997372

A simple model for the origin of quasiperiodic ultradian rhythms in sleep-wake state in the rat

Stephenson R
2013, Communicative & integrative biology, 6, e22433, 23802038

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2012

Sleep-wake behavior in the rat: ultradian rhythms in a light-dark cycle and continuous bright light

Stephenson R, Lim J, Famina S, Caron AM, Dowse HB
2012, Journal of biological rhythms, 27, 490-501, 23223374

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2011

Sleep homeostasis: Progress at a snail’s pace

Stephenson R
2011, Communicative & integrative biology, 4, 446-9, 21966567

Behavioural evidence for a sleep-like quiescent state in a pulmonate mollusc, Lymnaea stagnalis (Linnaeus)

Stephenson R, Lewis V
2011, The Journal of experimental biology, 214, 747-56, 21307060

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2010

Energy expenditure is affected by rate of accumulation of sleep deficit in rats

Caron AM, Stephenson R
2010, Sleep, 33, 1226-35, 20857870

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2009

Automated analysis of sleep-wake state in rats

Stephenson R, Caron AM, Cassel DB, Kostela JC
2009, Journal of neuroscience methods, 184, 263-74, 19703489

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2007

Prolonged deprivation of sleep-like rest raises metabolic rate in the Pacific beetle cockroach, Diploptera punctata (Eschscholtz)

Stephenson R, Chu KM, Lee J
2007, The Journal of experimental biology, 210, 2540-7, 17601958

Circadian rhythms and sleep-related breathing disorders

Stephenson R
2007, Sleep medicine, 8, 681-7, 17387041

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2006

The effect of time of day on apnoea index in the sleeping rat

Stephenson R, Horner RL
2006, Respiratory physiology & neurobiology, 154, 351-5, 16554190

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2005

A visual aid for computer-based analysis of sleep-wake state in rats

Mileva-Seitz VR, Louis RP, Stephenson R
2005, Journal of neuroscience methods, 148, 43-8, 15885800

A theoretical analysis of diving performance in the Weddell seal (Leptonychotes weddelli)

Stephenson R
2005, Physiological and biochemical zoology : PBZ, 78, 782-800, 16059847

Physiological control of diving behaviour in the Weddell seal Leptonychotes weddelli: a model based on cardiorespiratory control theory

Stephenson R
2005, The Journal of experimental biology, 208, 1971-91, 15879077

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2004

A theoretical study of the effect of circadian rhythms on sleep-induced periodic breathing and apnoea

Stephenson R
2004, Respiratory physiology & neurobiology, 139, 303-19, 15122996

Design and validation of a computer-based sleep-scoring algorithm

Louis RP, Lee J, Stephenson R
2004, Journal of neuroscience methods, 133, 71-80, 14757347

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2003

Do circadian rhythms in respiratory control contribute to sleep-related breathing disorders?

Stephenson R
2003, Sleep medicine reviews, 7, 475-90, 15018091

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2002

Theoretical and practical considerations in the application of whole body plethysmography to sleep research

Stephenson R, Gucciardi EJ
2002, European journal of applied physiology, 87, 207-19, 12111280

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2001

Circadian rhythms and sleep have additive effects on respiration in the rat

Stephenson R, Liao KS, Hamrahi H, Horner RL
2001, The Journal of physiology, 536, 225-35, 11579171

Respiratory control in neonatal mice with NADPH oxidase deficiency

Kazemian P, Stephenson R, Yeger H, Cutz E
2001, Respiration physiology, 126, 89-101, 11348637

Selected Contribution: Regulation of sleep-wake states in response to intermittent hypoxic stimuli applied only in sleep

Hamrahi H, Stephenson R, Mahamed S, Liao KS, Horner RL
2001, Journal of applied physiology (Bethesda, Md. : 1985), 90, 2490-501, 11356818

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2000

Effects of hypoxia and hypercapnia on circadian rhythms in the golden hamster (Mesocricetus auratus)

Jarsky TM, Stephenson R
2000, Journal of applied physiology (Bethesda, Md. : 1985), 89, 2130-8, 11090559

A model of the chemoreflex control of breathing in humans: model parameters measurement

Duffin J, Mohan RM, Vasiliou P, Stephenson R, Mahamed S
2000, Respiration physiology, 120, 13-26, 10786641

Circadian rhythms in the chemoreflex control of breathing

Stephenson R, Mohan RM, Duffin J, Jarsky TM
2000, American journal of physiology. Regulatory, integrative and comparative physiology, 278, R282-6, 10644650

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1998

Circadian rhythms in diving behavior and ventilatory response to asphyxia in canvasback ducks

Woodin M, Stephenson R
1998, The American journal of physiology, 274, R686-93, 9530234

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1997

Day-night differences in the respiratory response to hypercapnia in awake adult rats

Peever JH, Stephenson R
1997, Respiration physiology, 109, 241-8, 9342801

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1995

Respiratory and plumage gas volumes in unrestrained diving ducks (Aythya affinis)

Stephenson R
1995, Respiration physiology, 100, 129-37, 7624614

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1994

Regional cerebral blood flow during submergence asphyxia in Pekin duck

Stephenson R, Jones DR, Bryan RM
1994, The American journal of physiology, 266, R1162-8, 8184958

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1992

Metabolic responses to forced dives in Pekin duck measured by indirect calorimetry and 31P-MRS

Stephenson R, Jones DR
1992, The American journal of physiology, 263, R1309-17, 1481944

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