title: Infrared laser damage to ciliary motion in Phragmatopoma.
abstract: A glass neodymium laser was modified to make it possible to produce small lesions of 1-2 micron size with a quantitatively known amount of energy. The 1-06-micron radiation of this laser is sufficiently absorbed by water to work without the additions of dyes. Ciliary arrest in Phragmatopoma gills was produced by an amount of energy, sufficient to cause a rise in temperature of 150 degrees C in an area of 2 micron3. At these low doses the effect was fully reversible. With higher doses of laser energy the cilia stopped permanently, probably because of structural damage of the irradiated cells.
mesh_terms: D000818:Animals; D002465:Cell Movement / Q000528:radiation effects; D002923:Cilia / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D007259:Infrared Rays; D007834:Lasers; D008722:Methods; D009040:Motion Pictures; D011077:Polychaeta