Summer Sleep

Sleep and the endogenous melatonin rhythm of high arctic residents during the summer and winter.

The seasonal extremes of photoperiod in high latitudes place particular strain on the human circadian system. Arctic residence has been associated with poor sleep in both summer and winter. The goal of the work reported here was to study the circadian rhythms of individuals living in the high Arctic by measuring sleep variables and the timing of melatonin production. Two research trials were co...

Sleep during an Antarctic summer expedition: new light on "polar insomnia".

Sleep complaints are consistently cited as the most prominent health and well-being problem in Arctic and Antarctic expeditions, without clear evidence to identify the causal mechanisms. The present investigation aimed at studying sleep and determining circadian regulation and mood during a 4-mo Antarctic summer expedition. All data collection was performed during the continuous illumination of...

Summer Buzz

t is late Sunday afternoon in August. A child stands alone in the garden listening to the metallic sounds of insects, " reads Charles Burchfield's own description of The Insect Chorus. " They are all his world, so, to his mind, all things become saturated with their presence–crickets lurk in the depths of the grass, the shadows of the trees conceal fantastic creatures, and the boy looks with fe...

Summer Paper

Summer Camps

thousand. Four years later there were about two hundred camps in existence, and five thousand boys were in the field. The number has increased steadily and rapidly in the last five years. Five years ago about ten thousand boys received the benefit of outdoor life during the summer months. During the past season, 1907, there were between four and five hundred summer camps, and about twenty-five ...