منابع مشابه
Casting a genetic light on the evolution of eyes.
Light has been exploited for information by organisms through the evolution of photoreceptors and, ultimately, eyes in animals. Only a handful of eye types exist because the physics of light constrains photodetection. In the past few years, genetic tools have revealed several parallel pathways through which light guides behavior and have provided insights into the convergent evolution of eyes. ...
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Recent studies provide promising methodological advances in the use of pupillometry as on-line measurement of cognitive processes and show that visual attention allocation, mind-wandering, mental imagery, and even rhyme expectations can influence the size of the human pupil.
متن کاملThe Millennium Run Observatory: First Light
Simulations of galaxy evolution aim to capture our current understanding as well as to make predictions for testing by future experiments. Simulations and observations are often compared in an indirect fashion: physical quantities are estimated from the observational data and compared to models. However, many applications can benefit from a more direct approach, where the observing process is a...
متن کاملLight Perception: More Than Meets the Eyes
Larval zebrafish lacking eyes and pineal organ show elevated activity levels and undirected light-seeking behaviour upon loss of illumination. This behaviour, termed dark photokinesis, is mediated by hypothalamic deep brain photoreceptors expressing melanopsin.
متن کاملsurgical treatment of severely traumatized eyes with no light perception
purpose: to evaluate the anatomical and functional outcomes of surgical treantment in severely traumatized eyes with no light perception (nlp) vision. methods: in this prospective interventional case series, 18 eyes of 18 patients with severe trauma and nlp vision and rapd of 3-4+ admitted in nikookari hospital, tabriz-iran during 2002-2005 underwent deep vitrectomy and other appropriate proced...
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ژورنال
عنوان ژورنال: BMJ
سال: 1979
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.2.6184.275