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
The Widening Gyre (album) between masters of American roots music and Celtic music. Mairéad stated: «The title "The Widening Gyre" appeals to us and depicts the spiral of life, widening and embracing the new. It has an innate energy. We think that idea is reflected in the album's music». "The Widening Gyre" is a compelling development in Altan's story proving that they are still growing as artists, even after nearly thirty years together — the longest running lineup of founding members in Irish music. Altan recorded the new album over ten days from 29 July to 7 August 2014 entirely in Nashville, Tennessee (at