More a finger than a nose: The trigeminal motor and sensory innervation of the Schnauzenorgan in the elephant-nose Fish Gnathonemus petersii

Amey-Özel M, von der Emde G, Engelmann J, Grant K (2015)
The Journal of comparative neurology 523(5): 769-789.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
The weakly electric fish Gnathonemus petersii uses its electric sense to actively probe the environment. Its highly mobile chin appendage, the Schnauzenorgan, is rich in electroreceptors. Physical measurements have demonstrated the importance of the position of the Schnauzenorgan in funneling the fish's self-generated electric field. The present study focuses on the trigeminal motor pathway that controls Schnauzenorgan movement and on its trigeminal sensory innervation and central representation. The nerves entering the Schnauzenorgan are very large and contain both motor and sensory trigeminal components as well as an electrosensory pathway. With the use of neurotracer techniques, labeled Schnauzenorgan motoneurons were found throughout the ventral main body of the trigeminal motor nucleus but not among the population of larger motoneurons in its rostrodorsal region. The Schnauzenorgan receives no motor or sensory innervation from the facial nerve. There are many anastomoses between the peripheral electrosensory and trigeminal nerves, but these senses remain separate in the sensory ganglia and in their first central relays. Schnauzenorgan trigeminal primary afferent projections extend throughout the descending trigeminal sensory nuclei, and a few fibers enter the facial lobe. Although no labeled neurons could be identified in the brain as the trigeminal mesencephalic root, some Schnauzenorgan trigeminal afferents terminated in the trigeminal motor nucleus, suggesting a monosynaptic, possibly proprioceptive, pathway. In this first step toward understanding multimodal central representation of the Schnauzenorgan, no direct interconnections were found between the trigeminal sensory and electromotor command system, or the electrosensory and trigeminal motor command. The pathways linking perception to action remain to be studied. J. Comp. Neurol. 523:769-789, 2015. © 2014 Wiley Periodicals, Inc.
Erscheinungsjahr
Zeitschriftentitel
The Journal of comparative neurology
Band
523
Zeitschriftennummer
5
Seite
769-789
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Amey-Özel M, von der Emde G, Engelmann J, Grant K. More a finger than a nose: The trigeminal motor and sensory innervation of the Schnauzenorgan in the elephant-nose Fish Gnathonemus petersii. The Journal of comparative neurology. 2015;523(5):769-789.
Amey-Özel, M., von der Emde, G., Engelmann, J., & Grant, K. (2015). More a finger than a nose: The trigeminal motor and sensory innervation of the Schnauzenorgan in the elephant-nose Fish Gnathonemus petersii. The Journal of comparative neurology, 523(5), 769-789. doi:10.1002/cne.23710
Amey-Özel, M., von der Emde, G., Engelmann, J., and Grant, K. (2015). More a finger than a nose: The trigeminal motor and sensory innervation of the Schnauzenorgan in the elephant-nose Fish Gnathonemus petersii. The Journal of comparative neurology 523, 769-789.
Amey-Özel, M., et al., 2015. More a finger than a nose: The trigeminal motor and sensory innervation of the Schnauzenorgan in the elephant-nose Fish Gnathonemus petersii. The Journal of comparative neurology, 523(5), p 769-789.
M. Amey-Özel, et al., “More a finger than a nose: The trigeminal motor and sensory innervation of the Schnauzenorgan in the elephant-nose Fish Gnathonemus petersii”, The Journal of comparative neurology, vol. 523, 2015, pp. 769-789.
Amey-Özel, M., von der Emde, G., Engelmann, J., Grant, K.: More a finger than a nose: The trigeminal motor and sensory innervation of the Schnauzenorgan in the elephant-nose Fish Gnathonemus petersii. The Journal of comparative neurology. 523, 769-789 (2015).
Amey-Özel, Monique, von der Emde, Gerhard, Engelmann, Jacob, and Grant, Kirsty. “More a finger than a nose: The trigeminal motor and sensory innervation of the Schnauzenorgan in the elephant-nose Fish Gnathonemus petersii”. The Journal of comparative neurology 523.5 (2015): 769-789.

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