Varieties of filiform hairs: range fractionation by sensory afferents and cereal interneurons of a cricket

Shimozawa, Tateo; Kanou, Masamichi

doi:10.1007/bf00611913

Cited by 175 publications

(117 citation statements)

References 21 publications

Supporting

Mentioning

113

Contrasting

Order By: Relevance

“…Since each cercus is approximately a long finite cone, Shimozawa and collaborators [31,32,33] argued that both infinite planar and cylindrical approximations can be used successfully. This assumption is reasonable for hairs distributed in a line along the long axis of the cercus.…”

Section: The Boundary Layer Flowmentioning

confidence: 99%

“…Therefore, we model each hair as a rigid rod that swings in its socket as a linear, inverted pendulum [12,31,32,20,21,27]. The trajectory of each hair is described by the angle θ(t) that the hair makes with its resting position as it moves in response to the driving flow.…”

Section: Model Of the Hairmentioning

confidence: 99%

“…As mentioned in the Introduction, many previous modeling approaches [12,20,33,31,32] did not include the interaction between hairs mediated by fluid coupling. Our main objective was to develop a modeling framework that would allow us to determine the extent of these interactions and thus extend naturally the results of the motion of a single hair.…”

Section: Interaction Between the Hairsmentioning

confidence: 99%

“…It has even been suggested (though not demonstrated conclusively) that every single filiform hair may be re-identifiable [23,24,44], i.e., that every adult cricket with undamaged cerci has the same number of filiform hairs, and that each hair can be catalogued with a specific relative length, position and directional movement axis differing by at most 5% across different animals. These biophysical parameters are of substantial functional importance: the mechanical filtering of stimulus information in the cercal system is determined solely by the lengths and orientations of the hairs, and by the interactions between the hairs in the array [18,20,27,32,31,33]. The importance of the cerci for the animal's survival, the coupling between cercal structure and function, and the extremely low interanimal variability of cercal receptor array structure are all consistent with the conjecture that these structural attributes have been subject to selective pressure.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Interaction between arthropod filiform hairs in a fluid environment

Cummins

Gedeon

Klapper

et al. 2007

Journal of Theoretical Biology

View full text Add to dashboard Cite

Many arthropods use filiform hairs as mechanoreceptors to detect air motion. In common house crickets (Acheta domestica) the hairs cover two antenna-like appendages called cerci at the rear of the abdomen. The biomechanical stimulus-response properties of individual filiform hairs have been investigated and modeled extensively in several earlier studies. However, only a few previous studies have considered viscosity-mediated coupling between pairs of hairs, and only in particular configurations. Here we present a model capable of calculating hair-to-hair coupling in arbitrary configurations. We simulate the coupled motion of a small group of mechanosensory hairs on a cylindrical section of cercus. We have found that the coupling effects are non-negligible, and likely constrain the operational characteristics of the cercal sensory array.

show abstract

Section: The Boundary Layer Flowmentioning

confidence: 99%

Section: Model Of the Hairmentioning

confidence: 99%

Section: Interaction Between the Hairsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Interaction between arthropod filiform hairs in a fluid environment

Cummins

Gedeon

Klapper

et al. 2007

Journal of Theoretical Biology

View full text Add to dashboard Cite

show abstract

“…Air currents in the immediate vicinity move filiform hair sensilla on the cercus and activate sensory neurons at their base that exhibit directional and dynamic sensitivity based on biomechanical properties of the hairs [30]. In the house cricket Acheta domesticus, 500-750 hairs with diverse directional sensitivity are distributed on each cercus [18,26].…”

Section: Introductionmentioning

confidence: 99%

Ca2+ imaging of cricket protocerebrum responses to air current stimulation

Ogawa

Kajita

2015

Neuroscience Letters

View full text Add to dashboard Cite

Crickets (Gryllus bimaculatus) use the cercal sensory system at the rear of the abdomen to detect air currents and direct predator avoidance behavior. Sensory information regarding the direction and dynamic properties of air currents is processed within the terminal abdominal ganglion, and conveyed by ascending giant interneurons (GIs) to higher centers including the brain. However, the brain region responsible for decoding cercal sensory information has not yet been identified, nor the response properties within the brain characterized. In this study, we performed in vivo Ca 2+ imaging to investigate wind-evoked neural activities within the cricket protocerebrum. Ca 2+ responses to air current stimuli were observed at peripheral regions of the ventrolateral neuropile (VLNP) where projection of GIs' axon terminals has been observed in larvae. The wind-evoked Ca 2+ response had temporal dynamics and directional sensitivity that varied with different recorded regions displaying transient or sustained Ca 2+ increases. Individual cells showed Ca 2+ elevation in response to air currents from a specific angle, while stimuli from a different angle evoked decreased signals. Removing the antennae reduced the air-current-evoked responses in VLNP, suggesting contribution of sensory inputs from antennae in addition to the cercal inputs. The VLNP is presumably an integrative center for mechanosensory processing from antennae and cerci where directional information is primarily decoded by protocerebral 3 neurons.

show abstract

Functional morphology of insect mechanoreceptors

Keil

1997

Microsc. Res. Tech.

390

304

View full text Add to dashboard Cite

This paper reviews the structure and function of insect mechanoreceptors with respect to their cellular, subcellular, and cuticular organization. Four types are described and their function is discussed: 1, the bristles; 2, the trichobothria; 3, the campaniform sensilla; and 4, the scolopidia. Usually, bristles respond to touch, trichobothria to air currents and sound, campaniform sensilla to deformation of the cuticle, and scolopidia to stretch. Mechanoreceptors are composed of four cells: a bipolar sensory neuron, which is enveloped by the thecogen, the trichogen, and the tormogen cells. Apically, the neuron gives off a ciliary dendrite which is attached to the stimulustransmitting cuticular structures. In types 1-3, the tip of the dendrite contains a highly organized cytoskeletal complex of microtubules, the ''tubular body,'' which is connected to the dendritic membrane via short rods, the ''membrane-integrated cones'' (MICs). The dendritic membrane is attached to the cuticle via fine attachment fibers. The hair-type sensilla (types 1, 2) are constructed as first-order levers, which transmit deflection of the hair directly to the dendrite tip. In campaniform sensilla (type 3), there is a cuticular dome instead of a hair and the dendrite is stimulated by deformation of the cuticle. In these three types, a slight lateral compression of the dendrite tip is most probably the effective stimulus. In scolopidia, the dendritic membrane is most probably stimulated by stretch. On the subcellular level, connectors between the cytoskeleton, the dendritic membrane, and extracellular (cuticular) structures are present in all four types and are thought to be engaged in membrane depolarization.

show abstract

Varieties of filiform hairs: range fractionation by sensory afferents and cereal interneurons of a cricket

Cited by 175 publications

References 21 publications

Interaction between arthropod filiform hairs in a fluid environment

Interaction between arthropod filiform hairs in a fluid environment

Ca2+ imaging of cricket protocerebrum responses to air current stimulation

Functional morphology of insect mechanoreceptors

Contact Info

Product

Resources

About