Hektoen International

A Journal of Medical Humanities

Tag: circadian rhythms

  • A note on circadian clocks

    JMS Pearce Hull, England   I first started to enquire about circadian rhythms when wondering what it was that caused the periodicity of migraines in relationship to such diverse factors as emotions, tiredness, relaxation, hormonal changes, bright lights, and noise.1 The periodic threshold appeared susceptible to hypothalamic function, which in turn was modulated by seasonal…

  • “Am not I a fly like thee?” Drosophila melanogaster and the human genome

    Marshall A. Lichtman Rochester, New York, United States   A fruit fly displaying its large red eye. Among Thomas Hunt Morgan’s many contribution to the burgeoning science of genetics, he observed some male fruit flies had a mutant white eye. By cross-breeding males with mutant white eyes with females with the dominant trait and, subsequently,…