ArticleJournal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology2009
Physiology and morphology of sustaining and dimming neurons of the crab Chasmagnathus granulatus (Brachyura: Grapsidae).
Article in Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 15 citations in OpenAlex.
- Direction Selective Neurons Responsive to Horizontal Motion in a Crab Reflect an Adaptation to Prevailing Movements in Flat Environments.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2020Article
- Unidirectional Optomotor Responses and Eye Dominance in Two Species of Crabs.Frontiers in physiology · 2019Article
- Regionalization in the eye of the grapsid crab Neohelice granulata (=Chasmagnathus granulatus): variation of resolution and facet diameters.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2012Article
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
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Abstract
In crustaceans, sustaining (SN) and dimming (DN) neurons are readily identified by their distinct responses to a light pulse. However, morphological identification and electrophysiological characterization of these neurons has been achieved only in the crayfish. This study provides a description of SNs and DNs in a second crustacean species, the crab Chasmagnathus. SNs and DNs of the crab arborize extensively in the medulla and the axons project to the midbrain. Upon a light pulse, SNs depolarize and increase the firing rate while DNs hyperpolarize and reduce firing. These responses are highly consistent and their magnitudes depend on the intensity of the light pulse. When stimulated with a wide-field motion grating, SNs respond with a modulation of the membrane potential and spike frequency. We also characterized the responses of these neurons to a rotating e-vector of polarized light. SNs show the maximum depolarization when the e-vector approaches vertical. In contrast, DNs show maximal depolarization to near horizontal e-vector orientations. The semi-terrestrial crab and the crayfish inhabit unique light environments and exhibit disparate visual behaviors. Yet, we found that the location, morphology and physiology of SNs and DNs of the crab are nearly identical to those described in the crayfish.
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