P 456 Human pupillary light reflex during and after twofold valsalva maneuver
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چکیده
منابع مشابه
P 456 Human pupillary light reflex during and after twofold valsalva maneuver
Pumose. The influence of the widely used test of human autonomic functions the Valsalva maneuver (VhQ, on the parameters of a pupillaq light reflex, were stodied in nine normal volunteers (mean age 21 .O years) Methods. The consensual pupillary reactions to light were recorded by infrared-reflecting pupillograph, the pupillogram (PC) records on the type were treated off-line by computerized sys...
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Intrinsically photosensitive retinal ganglion cells (ipRGCs), whose photopigment melanopsin has a peak of sensitivity in the short wavelength range of the spectrum, constitute a common light input pathway to the olivary pretectal nucleus (OPN), the pupillary light reflex (PLR) regulatory centre, and to the suprachiasmatic nuclei (SCN), the major pacemaker of the circadian system. Thus, evaluati...
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To investigate the autonomic components of the pupillary light reflex in humans, we used infrared pupillometry combined with a partial local cholinergic (tropicamide) or alpha-adrenergic (thymoxamine) blockade. The pupillary response curve was analyzed using parameters identical or similar to those employed previously to study the autonomic components of the pupillary light reflex. Tropicamide ...
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In 19 normal subjects the pupillary reflex to light was studied over a range of stimulus intensities by infrared electronic pupillography and analysed by a computer technique. Increasing stimulus intensity was associated with an increase in direct light reflex amplitude and maximum rate of constriction and redilatation. Latency from stimulus to onset of response-decreased with increasing stimul...
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ژورنال
عنوان ژورنال: Vision Research
سال: 1995
ISSN: 0042-6989
DOI: 10.1016/0042-6989(95)90716-5