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Dr. Zeitzer is a circadian physiologist specializing in the understanding of the impact of light on circadian rhythms and other aspects of non-image forming light perception. He examines the manner in which humans respond to light and ways to manipulate this responsiveness, with direct application to jet lag, shift work, and altered sleep timing in teens. Dr. Zeitzer has also pioneered the use of actigraphy in the determination of epiphenomenal markers of psychiatric disorders.
Bright Light as a Countermeasure for Circadian Desynchrony
Light is the primary means by which the internal circadian clock remains aligned
("entrained") with the external world. Misalignment of this internal clock can occur during
situations such as shift work and jet travel across multiple time zones (jet lag). The
purpose of this study is to examine how sequences of brief flashes of light can affect
entrainment of the clock.
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