The Response of the Ampullae of Lorenzini of Elasmobranchs to Mechanical Stimulation

Abstract

1. The ampullae of Lorenzini are sensitive to weak tactile stimulation applied to the ends of their jelly-filled tubes. 2. Either an increase or a decrease in their resting discharge frequency may be caused, each with an opposite after-effect. 3. ‘Adaptation’ is total, being three-quarters completed in 3-8 sec. This ‘adaptation’ probably includes accommodative changes of the tissues. 4. The function of the ampullae is discussed, but no definite conclusion can yet be reached.