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Tuneable reflexes control antennal positioning in flying hawkmoths.

Abstract：

: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, Böhm'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.

journal_name

Nat Commun

journal_title

Nature communications

authors

Natesan D,Saxena N,Ekeberg Ö,Sane SP

doi

10.1038/s41467-019-13595-3

subject

Has Abstract

pub_date

2019-12-06 00:00:00

pages

5593

issue

1

issn

2041-1723

pii

10.1038/s41467-019-13595-3

journal_volume

10

pub_type

杂志文章

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