Mydriasis eye, and also to reduce painful ciliary muscle spasm (see cycloplegia). One effect of administration of a mydriatic is intolerance to bright light (photophobia). Purposefully-induced mydriasis via mydriatics is also used as a diagnostic test for Horner's syndrome. Mydriasis can be induced via modulation of adrenergic or cholinergic signalling. Within the adrenergic system, norepinephrine is a hormone and neurotransmitter responsible for regulating physiological processes in the body, including the involuntary muscles of the autonomic nervous system (such as the dilation or constriction of the pupil aperture via the muscles of the iris). Modulation of norepinephrine signalling can induce mydriasis. For
The Widening Gyre (album) the titles of some of the new tracks. The very same day, on their "Widening Gyre" iTunes page, Altan revealed the titles of the 14 tracks from their new studio album and released them for sale. On 27 January 2015, on their "Widening Gyre" Compass Records page, Altan made available short snippets of their new tracks. Mairéad Ní Mhaonaigh introduced the music on the album as an exploration of the influence of Appalachian music on Irish music. Recorded «with many good friends in the studio and Compass Records co-founder Garry West in the producer's chair steer[ing] the band in the