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Article: Central pathways mediating oculomotor reflexes in an elasmobranch, Scyliorhinus canicula.
- Article from:
- The Biological Bulletin
- Article date:
- October 1, 2002
- Author:
CopyrightCOPYRIGHT 2002 Marine Biological Laboratory. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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In vertebrates, primary vestibular afferents from the semicircular canals are linked to extraocular motoneurons by second-order vestibular neurons, which reflect a functional compartmentalization and topographic organization of hindbrain segments during development (1-4). Since the overall patterning of hindbrain segments is specified by the expression of particular genes (5), segmental segregation of second-order vestibular neurons suggests evolutionary relationships between specific oculomotor behaviors and the expression of particular genetic regulatory elements (e.g., a particular Hox gene (6)). Accordingly, neurons arising from the same hindbrain segment should always ...