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Tuneable reflexes control antennal positioning in flying hawkmoths
KTH, School of Electrical Engineering and Computer Science (EECS), Computer Science, Computational Science and Technology (CST). Manipal Academy of Higher Education, Manipal, 576104, India; National Centre for Biological Sciences, Tata Institute of Fundamental Research, GKVK campus, Bellary road, Bangalore, 560065, India .ORCID iD: 0000-0002-6841-3886
Tata Inst Fundamental Res, Natl Ctr Biol Sci, GKVK Campus,Bellary Rd, Bangalore 560065, Karnataka, India..
KTH, School of Electrical Engineering and Computer Science (EECS), Computer Science, Computational Science and Technology (CST).ORCID iD: 0000-0002-2792-1622
Tata Inst Fundamental Res, Natl Ctr Biol Sci, GKVK Campus,Bellary Rd, Bangalore 560065, Karnataka, India..
2019 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 10, article id 5593Article in journal (Refereed) Published
Abstract [en]

Complex behaviours may be viewed as sequences of modular actions, each elicited by specific sensory cues in their characteristic timescales. From this perspective, we can construct models in which unitary behavioural modules are hierarchically placed in context of related actions. Here, we analyse antennal positioning reflex in hawkmoths as a tuneable behavioural unit. Mechanosensory feedback from two antennal structures, Bohm's bristles (BB) and Johnston's organs (JO), determines antennal position. At flight onset, antennae attain a specific position, which is maintained by feedback from BB. Simultaneously, JO senses deflections in flagellum-pedicel joint due to frontal airflow, to modulate its steady-state position. Restricting JO abolishes positional modulation but maintains stability against perturbations. Linear feedback models are sufficient to predict antennal dynamics at various set-points. We modelled antennal positioning as a hierarchical neural-circuit in which fast BB feedback maintains instantaneous set-point, but slow JO feedback modulates it, thereby elucidating mechanisms underlying its robustness and flexibility.

Place, publisher, year, edition, pages
Nature Publishing Group, 2019. Vol. 10, article id 5593
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Biological Sciences
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URN: urn:nbn:se:kth:diva-266220DOI: 10.1038/s41467-019-13595-3ISI: 000502081200001PubMedID: 31811150Scopus ID: 2-s2.0-85076271278OAI: oai:DiVA.org:kth-266220DiVA, id: diva2:1383162
Note

QC 20200107

Available from: 2020-01-07 Created: 2020-01-07 Last updated: 2020-01-07Bibliographically approved

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Natesan, Dinesh

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