Cited by 59Fish biology, ecology, and behaviorNeural dynamics and brain functionNeuroscience and Neuropharmacology Research

The Mormyromast Region of the Mormyrid Electrosensory Lobe. I. Responses to Corollary Discharge and Electrosensory Stimuli

Mohr, Claudia, Roberts, Patrick D., Bell, Curtis C.·2003·Journal of Neurophysiology

Abstract

This is the first of two papers on the electrosensory lobe (ELL) of mormyrid electric fish. The ELL is the first stage in the central processing of electrosensory information from electroreceptors. Cells of the mormyrid ELL are affected at the time of the electric organ discharge (EOD) by two different inputs, EOD-evoked reafferent input from electroreceptors and corollary discharge input associated with the motor command that elicits the EOD. This first paper examines the intracellular responses of ELL cells to these two different inputs in the region of ELL that receives primary afferent fibers from mormyromast electroreceptors. Mormyromast electroreceptors are responsible for active electrolocation. The paper extends previous studies of the mormyrid ELL by describing the physiological responses of cell types, which had been previously identified only morphologically, including: the two types of Purkinje-like medium ganglionic cells, MG1 and MG2; the thick smooth dendrite cells; and the medium fusiform cells. In addition, two previously unrecognized cell types, the large thick smooth dendrite cell and the interzonal cell, are described both morphologically and physiologically for the first time. Finally, new information is provided on the two types of ELL efferent cells, the large ganglionic and large fusiform cells. All cell types, except for the medium fusiform cell, show nonlinear interactions between electrosensory and corollary discharge inputs. All cell types, except for the medium fusiform cell and the interzonal cell, also show plasticity of the corollary discharge response after pairing with electrosensory stimuli.

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Crossref · 10.1152/jn.00211.2003

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  • The knollenorgan corollary discharge inhibits the respective electroreceptor during electric-organ discharge.

    “These systems differ from the ampullary system in that they require CDs that amplify (mormyromast) or inhibit (knollenorgan) the respective electroreceptor during EOD.”

    From Corollary discharge across the animal kingdom (2008) · cites this paper as [50]

  • The mormyromast corollary discharge amplifies the respective electroreceptor during electric-organ discharge.

    “These systems differ from the ampullary system in that they require CDs that amplify (mormyromast) or inhibit (knollenorgan) the respective electroreceptor during EOD.”

    From Corollary discharge across the animal kingdom (2008) · cites this paper as [50]

  • The mormyrid has two additional electroreceptor subtypes, mormyromasts and knollenorgans, that are susceptible to electric-organ discharge feedback, and compensatory corollary discharge systems are in place to accommodate them.

    “Interestingly, the mormyrid has two additional electroreceptor subtypes (mormyromasts and knollenorgans) that are susceptible to electric-organ discharge (EOD) feedback and, accordingly, compensatory CD systems are in place to accommodate them50,51.”

    From Corollary discharge across the animal kingdom (2008) · cites this paper as [50]

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Research works printed but not linked: 1

  1. Bell CC and Szabo T. Electroreception in mormyrid fish: central anatomy. In: Electroreception, edited by Bullock TH and Heiligenberg W. New York: Wiley, 1986, p. 375- 421.

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Authors
Mohr, C., Roberts, P. D., & Bell, C. C.
Affiliations
Oregon Health & Science University (US)
Venue
Journal of Neurophysiology
Published
2003-08
Volume
90
Issue
2
Pages
1193-1210
ISSN
  • 0022-3077 (ISSN-L)
  • 1522-1598
OpenAlex
W2049374943
Cited by
59
References
39
Citations by year
2026: 1 · 2024: 2 · 2023: 2 · 2022: 2 · 2021: 1 · 2020: 3 · 2019: 3 · 2018: 2 · 2017: 1 · 2016: 4 · 2015: 1 · 2014: 6 · 2013: 1 · 2012: 2
FWCI
3.43
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neurophysiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Mental Health (MH60996, R01MH060996)
Topics
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Fish biology, ecology, and behavior
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
corollary discharge, electric organ discharge, active electrolocation, intracellular responses
MeSH terms
Action Potentials, Animals, Electric Fish, Electric Organ, Electrophysiology, Synaptic Transmission, Neuronal Plasticity, Neurons, Sensory Receptor Cells, Sense Organs, Excitatory Postsynaptic Potentials

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