Identification of visual pallial telencephalon in the goldfish, Carassius auratus: a combined cytochrome oxidase and electrophysiological study

• Published in: Brain research Vol. 919; no. 1; pp. 82 - 93
• Main Authors: Saidel, William M., Marquez-Houston, Kathleen, Butler, Ann B.
• Format: Journal Article
• Language: English
• Published: London Elsevier B.V 16.11.2001; Amsterdam Elsevier; New York, NY
• Subjects: Actinopterygian; Action Potentials - physiology; Animals; Area dorsalis; Biological and medical sciences; Brain Mapping; Carassius auratus; Cytochrome oxidase; Electron Transport Complex IV - analysis; Electron Transport Complex IV - metabolism; Electrophysiology; Evoked Potentials, Visual - physiology; Eye and associated structures. Visual pathways and centers. Vision; Fundamental and applied biological sciences. Psychology; Goldfish - anatomy & histology; Goldfish - physiology; Histocytochemistry; Neurophysiology; Telencephalon - anatomy & histology; Telencephalon - enzymology; Telencephalon - physiology; Teleost; Vertebrates: nervous system and sense organs; Visual Pathways - physiology; Visual telencephalon; Teleost; Visual telencephalon; Area dorsalis; Sensory systems; Cytochrome oxidase; Actinopterygian; Neurophysiology; Vertebrata; Carassius auratus; Visual pathway; Enzyme; Pisces; Central nervous system; Cytochrome-c oxidase; Electrophysiology; Telencephalon; Oxidoreductases
• ISSN: 0006-8993; 1872-6240
• DOI: 10.1016/S0006-8993(01)03001-3

A strategy based upon a comparative decrease in bilateral symmetry of cytochrome oxidase (COX) histochemistry following unilateral eye enucleation was used to identify the primary visual area in the area dorsalis of the telencephalon of the goldfish, Carassius auratus. The lateral zone of area dorsalis (Dl) at about the level of the anterior commissure exhibits such a bilateral difference. A parallel decline in the symmetry COX reactivity was observed in the associated part of the central zone (Dc). Electrophysiological activity using extracellular techniques confirmed the visually-driven activity of neurons in these areas. Lesions confirmed the loci in the lateral zone of area dorsalis, including both its dorsal and ventral parts. Single- and multi-unit recordings exhibited a variety of responses to different light stimuli. Single unit latency measures proved not to be a reliable measure of target areas. Responses habituated to stimuli repeated within 5 s and were only reliably evoked with intervals greater than several seconds.