Pupillary response Pupillary response Pupillary response is a physiological response that varies the size of the pupil, via the optic and oculomotor cranial nerve. A constriction response (miosis), is the narrowing of the pupil, which may be caused by scleral buckles or drugs such as opiates/opioids or anti hypertension medications. Constriction of the pupil occurs when the circular muscle, controlled by the parasympathetic nervous system (PSNS), contracts. A dilation response (mydriasis), is the widening of the pupil and may be caused by adrenaline, anticholinergic agents or drugs such as MDMA, cocaine, amphetamines and some hallucinogenics. Dilation of the pupil occurs when the
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