title: Photoresponse from the statocyst hair cell in Lymnaea stagnalis.
abstract: Sensory cells for associative learning of light and turbulence were studied in Lymnaea. Intracellular recordings with Lucifer Yellow filled electrodes were made from photoreceptors and statocyst hair cells. Photoreceptors had a long latency, graded depolarizing response to a flash of light; they extended their axon to the cerebral ganglion. The caudal hair cell, one of 12 cells in the statocyst, responded to brief light with a depolarization and superimposed impulse activity. It formed its terminal arborization close to the photoreceptor endings in the cerebral ganglion. Ca(2+)-free saline reversibly abolished the photoresponse in the hair cell, suggesting the information was conveyed via a chemical synapse. These findings demonstrated that sensory information for associative learning was convergent at the statocyst hair cell.
authors.affiliation: Laboratory of Neurobiological Engineering, Graduate School of High-Technology for Human Welfare, Tokai University, Numazu 410-0321, Shizuoka, Japan.
authors.forename: Noriko
authors.initials: N
authors.lastname: Tsubata
authors.forename: Akira
authors.initials: A
authors.lastname: Iizuka
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Horikoshi
authors.forename: Manabu
authors.initials: M
authors.lastname: Sakakibara
mesh_terms: D000818:Animals; D001245:Association Learning; D017952:Ganglia, Invertebrate / Q000166:cytology / Q000502:physiology / Q000528:radiation effects; D006198:Hair Cells, Auditory / Q000502:physiology / Q000528:radiation effects*; D066298:In Vitro Techniques; D008027:Light; D008195:Lymnaea; D008564:Membrane Potentials; D017956:Photoreceptor Cells, Invertebrate / Q000502:physiology*; D011930:Reaction Time