A direct descending pathway informing locomotor networks about tactile sensor movement

Ache JM, Haupt S, Dürr V (2015)
J. Neurosci. 35(9): 4081-4091.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Forschungsgruppe
Monitoring real-time real-world interaction in an identified neuron
Abstract / Bemerkung
Much like visually impaired humans use a white-cane, nocturnal insects and mammals use antennae or whiskers for near-range orientation. Stick insects, for example, rely heavily on antennal tactile cues to find footholds and detect obstacles. Antennal contacts can even induce aimed reaching-movements. Since tactile sensors are essentially one-dimensional, they must be moved to probe the surrounding space. Sensor movement is thus an essential cue for tactile sensing, which needs to be integrated by thoracic networks for generating appropriate adaptive leg movements. Based on single and double recordings, we describe a descending neural pathway comprising three identified ON- and OFF-type neurons that convey complementary, unambiguous, and short-latency information about antennal movement to thoracic networks in the stick insect. The neurons are sensitive to the velocity of antennal movements across the entire range covered by natural movements, irrespective of movement direction and joint angle. Intriguingly, none of them originates from the brain. Instead, they descend from the gnathal ganglion and receive input from antennal mechanoreceptors in this lower region of the central nervous system. From there, they convey information about antennal movement to the thorax. One of the descending neurons, which is additionally sensitive to substrate vibration, feeds this information back to the brain via an ascending branch. We conclude that descending interneurons with complementary tuning characteristics, gains, input-, and output-regions convey detailed information about antennal movement to thoracic networks. This pathway bypasses higher processing centres in the brain and constitutes a short-cut between tactile sensors on the head and the thorax.
Erscheinungsjahr
2015
Zeitschriftentitel
J. Neurosci.
Band
35
Ausgabe
9
Seite(n)
4081-4091
ISSN
0270-6474
Page URI
https://pub.uni-bielefeld.de/record/2715877

Zitieren

Ache JM, Haupt S, Dürr V. A direct descending pathway informing locomotor networks about tactile sensor movement. J. Neurosci. 2015;35(9):4081-4091.
Ache, J. M., Haupt, S., & Dürr, V. (2015). A direct descending pathway informing locomotor networks about tactile sensor movement. J. Neurosci., 35(9), 4081-4091. doi:10.1523/JNEUROSCI.3350-14.2015
Ache, J. M., Haupt, S., and Dürr, V. (2015). A direct descending pathway informing locomotor networks about tactile sensor movement. J. Neurosci. 35, 4081-4091.
Ache, J.M., Haupt, S., & Dürr, V., 2015. A direct descending pathway informing locomotor networks about tactile sensor movement. J. Neurosci., 35(9), p 4081-4091.
J.M. Ache, S. Haupt, and V. Dürr, “A direct descending pathway informing locomotor networks about tactile sensor movement”, J. Neurosci., vol. 35, 2015, pp. 4081-4091.
Ache, J.M., Haupt, S., Dürr, V.: A direct descending pathway informing locomotor networks about tactile sensor movement. J. Neurosci. 35, 4081-4091 (2015).
Ache, Jan Marek, Haupt, Stephan, and Dürr, Volker. “A direct descending pathway informing locomotor networks about tactile sensor movement”. J. Neurosci. 35.9 (2015): 4081-4091.

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