Mydriasis pupil) or overactivity of the sympathetic nervous system (SNS). Pupil diameter also increases in reaction to cognitive tasks requiring memory and attention, and this phenomenon is used as an indicator of mental activation (‘arousal’) in psychophysiological experiments . Natural release of the hormone oxytocin can cause mild to moderate mydriasis. Parasympathetic fibers travel with cranial nerve III, the oculomotor nerve, to innervate the circular layer of muscle of the eye (sphincter pupillae). Damage to this nerve typically manifests itself as mydriasis, because the sympathetic supply to the pupil, which causes mydriasis, remains unaffected, and therefore unopposed. Multiple central nervous system
State River Widening State River Widening State River Widening, named after the title of a Chinese propaganda photo, are a London based trio, formed in May 1998, comprising multi-instrumentalists David Sheppard and Keiron Phelan, along with drummer/percussionist Jon Steele. Friends from school (in south London) Sheppard and Phelan began experimental recordings in 1996, soon hooking up with percussionist Steele to leaven their intertwining, Nick Drake-like acoustic guitars with vigorous yet dexterous drumming. A debut single, "Unsung Couples", was released on the Gold Hole label in November 1998. SRW’s hypnotic cycles of avant-rock melody connected with an audience then thrilling to similarly inclined practitioners