RE: [escepticos] Jet lag y tal

["javarm" <javarm@...>]

Respecto a lo de la parte de atrás de las rodillas... por raro que
suene, Campbell y Murphy presentaron un estudio en 1998 que mostraba los
efectos de la aplicación de luz en esa zona (extraocular, vamos jejee
salvo que uno tenga ojos detrás de la rodilla) en la segregación de
melatonina. Lee por ejemplo ScienceWeek:
http://scienceweek.com/swfr057.htm

CIRCADIAN RHYTHMS IN HUMANS: EXTRA-VISUAL PHOTOTRANSDUCTION
In biology, a circadian rhythm is a daily cyclical process, be it
biochemical, or physiological, or behavioral. The human sleep-
wake cycle is the most familiar example. Circadian rhythms are
often described in terms of endogenous "biological clocks", with
the thrust of research to reduce some particular behavioral or
physiological circadian rhythm to biochemical events. These
clocks are usually set by environmental cues such as the light-
dark cycle, and what is characteristic of an endogenous clock is
that if one removes the environmental cue, keeps the organism in
constant light, for example, the endogenous rhythm will continue,
but will tend to drift out of synch. Restoring the external
light-dark cue will reset the clock to its normal intrinsic
rhythm. ... ... Campbell and Murphy (Cornell Univ., US) report
measurements of the response of the human circadian clock to
extraocular light exposure involving light pulses presented to
the popliteal region (the area behind the knee). They report a
systematic relation between the timing of the light pulse and the
magnitude and direction of clock phase shifts. The authors
suggest their findings challenge the belief that mammals are
incapable of extraretinal circadian phototransduction, and that
the findings also have implications for the development of more
effective treatments of sleep and circadian rhythm disorders.
QY: Scott S. Campbell, Cornell Univ. Medical College 212-746-1067
(Science 16 Jan 98) (Science-Week 30 Jan 98)

Saludos 

javier armentia
http://javarm.blogalia.com