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Impulse activity in response to shadowing the median ocellus is recorded in a few fibers of the circumesophageal connectives. Picrotoxin blocks this shadow-induced activity. A model of the shadow reflex pathway is presented.<\/jats:p>","DOI":"10.1126\/science.177.4047.438","type":"journal-article","created":{"date-parts":[[2006,10,5]],"date-time":"2006-10-05T14:03:38Z","timestamp":1160057018000},"page":"438-441","source":"Crossref","is-referenced-by-count":21,"title":["Photoreception in a Barnacle: Electrophysiology of the Shadow Reflex Pathway in\n            <i>Balanus cariosus<\/i>"],"prefix":"10.1126","volume":"177","author":[{"given":"Ronald","family":"Millecchia","sequence":"first","affiliation":[{"name":"Department of Physiology and Biophysics, West Virginia University Medical Center, Morgantown 26506"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G. 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