Active sensing in a dynamic olfactory world

Crimaldi, John P.; Lei, Hong; Schaefer, Andreas T.; Schmuker, Michael; Smith, Brian H.; True, Aaron C.; Verhagen, Justus V.; Victor, Jonathan D.

doi:10.1007/s10827-021-00798-1

Cited by 23 publications

(24 citation statements)

References 65 publications

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“…On the other hand, bees may move their antennae in different ways upon stimulation with a novel or familiar odor, which in turn could change how the odor is perceived. That is, antennal movements described in our study could be considered as active sensing [ 40 , 41 ], meaning that movements mights enhance signal detection. Odor molecules are carried by turbulent airstreams that shear the clouds of molecules into thin filaments [ 42 ].…”

Section: Discussionmentioning

confidence: 99%

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Novelty detection in early olfactory processing of the honey bee, Apis mellifera

et al. 2022

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Animals are constantly bombarded with stimuli, which presents a fundamental problem of sorting among pervasive uninformative stimuli and novel, possibly meaningful stimuli. We evaluated novelty detection behaviorally in honey bees as they position their antennae differentially in an air stream carrying familiar or novel odors. We then characterized neuronal responses to familiar and novel odors in the first synaptic integration center in the brain–the antennal lobes. We found that the neurons that exhibited stronger initial responses to the odor that was to be familiarized are the same units that later distinguish familiar and novel odors, independently of chemical identities. These units, including both tentative projection neurons and local neurons, showed a decreased response to the familiar odor but an increased response to the novel odor. Our results suggest that the antennal lobe may represent familiarity or novelty to an odor stimulus in addition to its chemical identity code. Therefore, the mechanisms for novelty detection may be present in early sensory processing, either as a result of local synaptic interaction or via feedback from higher brain centers.

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Section: Discussionmentioning

confidence: 99%

“…The movements we describe here could enhance detection of these sparse filaments, thus enhancing the detectability and/or discriminability of odors in an airstream. It could therefore be that the movements we describe here perform an analogous function to increased sniffing in mammals towards novel odors [ 41 , 43 ].…”

Section: Discussionmentioning

confidence: 99%

Novelty detection in early olfactory processing of the honey bee, Apis mellifera

et al. 2022

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“…Our results, together with other studies of plasticity in the AL [28,56], expands the AL coding dimensions to include higher-order features such as olfactory familiarity and novelty. This new coding scheme in the AL, along with the novelty detection at higher synaptic centers such as MB, likely shift attention to novel odors, which may offer behavioral benefits to the animal when linked to active sensing [37,38].…”

Section: Discussionmentioning

confidence: 99%

Section: Antenna Movement Affected By Familiar and Novel Odorsmentioning

confidence: 91%

“…On the other hand, bees may move their antennae in different ways upon stimulation with a novel or familiar odor, which in turn change how the odor is perceived. That is, antennal movements described in our study could be considered as 'active sensing' [37,38], meaning the sensor's behavior is altered by the bearer in order to enhance 'meaningful' signal detection. This strategy could be important, especially when the odor signal is scarce.…”

Section: Antenna Movement Affected By Familiar and Novel Odorsmentioning

confidence: 99%

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Novelty detection in early olfactory processing of the honey bee, Apis mellifera

Lei

Haney

Jernigan

et al. 2021

Preprint

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Animals are constantly bombarded with stimuli, which presents a fundamental problem of sorting among pervasive uninformative stimuli and novel, possibly meaningful stimuli. We evaluated novelty detection behaviorally in honey bees as they position their antennae differentially in an air stream carrying familiar or novel odors. We then characterized neuronal responses to familiar and novel odors in the first synaptic integration center in the brain, the antennal lobes. We found that the neurons that exhibited stronger initial responses to the odor that was to be familiarized are the same units that later distinguish familiar and novel odors, independently of chemical identities. These units, including both projection neurons and local neurons, showed a decreased response to the familiar odor but an increased response to the novel odor. Our results suggest that the antennal lobe may assign a category of familiarity or novelty to an odor stimulus in addition to its chemical identity code. Therefore, the mechanisms for novelty detection may be present in early sensory processing, either as a result of local synaptic interaction or via feedback from higher brain centers.

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Olfactory navigation in arthropods

2023

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Using odors to find food and mates is one of the most ancient and highly conserved behaviors. Arthropods from flies to moths to crabs use broadly similar strategies to navigate toward odor sources—such as integrating flow information with odor information, comparing odor concentration across sensors, and integrating odor information over time. Because arthropods share many homologous brain structures—antennal lobes for processing olfactory information, mechanosensors for processing flow, mushroom bodies (or hemi-ellipsoid bodies) for associative learning, and central complexes for navigation, it is likely that these closely related behaviors are mediated by conserved neural circuits. However, differences in the types of odors they seek, the physics of odor dispersal, and the physics of locomotion in water, air, and on substrates mean that these circuits must have adapted to generate a wide diversity of odor-seeking behaviors. In this review, we discuss common strategies and specializations observed in olfactory navigation behavior across arthropods, and review our current knowledge about the neural circuits subserving this behavior. We propose that a comparative study of arthropod nervous systems may provide insight into how a set of basic circuit structures has diversified to generate behavior adapted to different environments.

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Active sensing in a dynamic olfactory world

Cited by 23 publications

References 65 publications

Novelty detection in early olfactory processing of the honey bee, Apis mellifera

Novelty detection in early olfactory processing of the honey bee, Apis mellifera

Novelty detection in early olfactory processing of the honey bee, Apis mellifera

Olfactory navigation in arthropods

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