title: The depth profile of electrically induced tectal sustained potential shift responses in the goldfish (Carassius auratus).
abstract: Tectal sustained potential shifts (SPSs) were recorded in response to electrical stimulation of the tectal surface in immobilized goldfish using saline-filled glass microelectrodes. The peak amplitudes of surface recorded SPS responses were negative, this negativity declining with increasing tectal depth, reversing in polarity at a depth of ca. 350 microns and subsequently increasing in positivity. These opposing SPS polarities are attributed to field potentials generated by the source and sink of extracellular K+ ([K+]e) redistribution through a functional syncitium of radially connected glia.
authors: Division of Cell and Experimental Biology, School of Biology and Biochemistry, Queen's University, Belfast, United Kingdom.
authors: A
authors: A
authors: Nicol
authors: U
authors: U
authors: Savage
authors: P
authors: P
authors: Laming
mesh_terms: D000818:Animals; D001143:Arousal; D001921:Brain; D004558:Electric Stimulation; D006054:Goldfish; D009431:Neural Conduction; D010775:Photic Stimulation; D011930:Reaction Time