A5049843035- Neurobiology and Insect Physiology Research
- Insect and Arachnid Ecology and Behavior
- Animal Behavior and Reproduction
- Physiological and biochemical adaptations
- Cephalopods and Marine Biology
- Spacecraft Design and Technology
- Neural dynamics and brain function
- Photoreceptor and optogenetics research
- Analytical Chemistry and Sensors
- Neuroscience and Neuropharmacology Research
- Material Dynamics and Properties
- Plant and animal studies
- Insect Utilization and Effects
- Spacecraft Dynamics and Control
- Liquid Crystal Research Advancements
- Sports Performance and Training
- Electrochemical sensors and biosensors
- Visual perception and processing mechanisms
- Animal Vocal Communication and Behavior
- Aquaculture Nutrition and Growth
- Plant and Biological Electrophysiology Studies
- Spacecraft and Cryogenic Technologies
- Theoretical and Computational Physics
- Neuroscience and Neural Engineering
- Magnesium in Health and Disease
Hokkaido University
2014-2023
National Institute of Technology
2023
Advanced Institute of Materials Science
2023
Tohoku University
2005-2023
Fukui National College of Technology
2023
Hokkaido University of Science
2019-2022
Tokyo University of Agriculture and Technology
2017
Hokkaido Sapporo Kita High School
2016
Japan Science and Technology Agency
1997-2015
Okayama University of Science
1995-2011
Abstract A comparative analysis of animal behavior (e.g., male vs. female groups) has been widely used to elucidate specific one group since pre-Darwinian times. However, big data generated by new sensing technologies, e.g., GPS, makes it difficult for them contrast differences manually. This study introduces DeepHL, a deep learning-assisted platform the movement data, i.e., trajectories. software uses neural network based on an attention mechanism automatically detect segments in...
As a neurotransmitter and neuromodulator, serotonin (5-HT) influences neuronal outgrowth in the nervous systems of several species. In PC12 cells, 5-HT is known to have neuritogenic effects, although signal transduction pathway responsible for these effects not understood. this study, we hypothesized that 5-HT-induced increase intracellular Ca2+ concentration ([Ca2+]i) could be involved mediating 5-HT. Application cells enhanced nerve growth factor (NGF)-induced neurite dose-dependent...
Nitric oxide (NO) is a gaseous mediator involved in various physiological phenomena, such as vasorelaxation and neurotransmission. Investigation of local cellular responses NO production vivo vitro requires measurement method with high spatial resolution. For selective measurement, we therefore developed microcoaxial electrode whose tip diameter less than 10 μm. Calibration using concentrations (0.1−1.0 μM) showed that the has good linearity (r = 0.99) its detection limit 0.075 μM (S/N 3)....
While sensory information is encoded by firing patterns of individual neurons, it also represented spatiotemporal activity in populations the neurons. Postsynaptic interneurons decode population response and extract specific information. This extraction presynaptic activities a process critical to defining input–output function postsynaptic neuron. To understand “algorithm” for extraction, we examined directional sensitivities Ca 2+ responses dendrites two types wind-sensitive (INs) with...
Crickets exhibit oriented walking behavior in response to air-current stimuli. Because crickets move the opposite direction from stimulus source, this is considered represent ‘escape behavior’ an approaching predator. However, details of stimulus-angle-dependent control locomotion during immediate phase, and neural basis underlying directional motor remain unclear. In study, we used a spherical-treadmill system measure locomotory parameters including trajectory, turn angle velocity phase...
The ability of two-dimensional, layered transition-metal dichalcogenides (TMDs) to promote hydrogen evolution reaction (HER) has attracted much attention for hydrogen-generation applications. Their electrocatalytic active sites originally come from unique electronic properties at the edges. Here, we use scanning electrochemical cell microscopy (SECCM) visualize and quantify HER activities tungsten disulfide (WS2) islands. We show that correlated current distribution is affected by number WS2...
Stimulus-specific adaptation (SSA) is considered to be the neural underpinning of habituation frequent stimuli and novelty detection. However, neither cellular mechanism underlying SSA nor link between SSA-like neuronal plasticity behavioral modulation well understood. The wind-detection system in crickets one best models for investigating basis SSA. We found that exhibit stimulus-direction-specific wind-elicited avoidance behavior. Repetitive air currents inducing this reduced firings...
Squid can rapidly change the chromatic patterns on their body. The are created by expansion and retraction of chromatophores. chromatophore consists a central pigment-containing cell surrounded radial muscles that controlled motor neurons located in nervous system (CNS). In this study we used semi-intact squid (Sepioteuthis lessoniana) displaying centrally natural to analyze spatial temporal activities chromatophores dorsal mantle skin. We found oscillated with miniature...
Animals flexibly change their locomotion triggered by an identical stimulus depending on the environmental context and behavioral state. This indicates that additional sensory inputs in different modality from triggering escape response affect neuronal circuit governing behavior. However, how spatio-temporal relationships between these two stimuli effect a remains unknown. We studied this question, using crickets, which respond to short air-puff oriented walking activity mediated cercal...
ABSTRACT Animals perceive their surroundings using various modalities of sensory inputs to guide locomotion. Nocturnal insects such as crickets use mechanosensory mediated by antennae orient in darkness. Spatial information is acquired via voluntary antennal contacts with surrounding objects, but it remains unclear whether the modulate behaviors other organs based on that information. Crickets exhibit escape behavior response a short air puff, which detected abdominal called cerci and...
SUMMARY We investigated the function of octopamine (OA) as a motor pattern inducer in earthworm Eisenia fetida. used semi-intact preparations, consisting 20 sequential segmental ganglia ventral nerve cord (VNC) together with body wall from middle animal. Bath-application 10–4 mol l–1 OA to preparation induced phasic muscle contractions, which are consistent crawling. In isolated VNC, bursts neuron activity first lateral nerves. Burst frequency increased concentration, large increase observed...
The cercal sensory system of the cricket mediates detection and analysis low velocity air currents in animal's immediate environment, is implemented around an internal representation current direction that demonstrates essential features a continuous neural map. Previous neurophysiological anatomical studies have yielded predictions global spatio-temporal patterns activity should be evoked afferent map by stimuli different directions. We tested those direct visualization ensemble using Ca2+...
Abstract To survive a predator’s attack successfully, animals choose appropriate actions from multiple escape responses. The motor performance of response governs successful survival, which implies that the action selection in behaviour is based on trade-off between competing behavioural benefits. Thus, quantitative assessment will shed light biological basis decision-making. explore underlying selection, we focused two distinct wind-elicited responses crickets, running and jumping. We first...
An in vivo Ca2+ imaging technique was applied to examine the cellular mechanisms for attenuation of wind sensitivity identified primary sensory interneurons cricket cercal system. Simultaneous measurement cytosolic concentration ([Ca2+]i) and membrane potential a wind-sensitive giant interneuron (GI) revealed that successive air puffs caused accumulation dendrites diminished wind-evoked bursting response GI. After tetanic stimulation presynaptic nerves induced larger GI, reversibly decreased...
Acoustic signals trigger various behaviours in insects such as courtship or escape from predators. However, it remains unknown whether utilize acoustic to recognize environmental contexts. The cricket is a prominent model insect for neuroethological studies on behaviour because female crickets exhibit positive phonotaxis response male calling songs, and flying display avoidance high-frequency sounds echolocation call of bats. carrier frequency these major factor determining they initiate...
Recent advances in robotics and measurement technologies have enabled biologists to record the trajectories created by animal movements. In this paper, we convert time series of into sequences finite symbols, then propose a machine learning method for gaining biological insight from trajectory data form symbol sequences. The proposed is used training classifier which differentiates between two groups animals such as male female. represented sparse linear combination subsequence patterns,...
This paper proposes a thermal design procedure for micro- and nanosatellites that can be completed in one year. Two concepts keep components within their temperature range, reducing the change by using whole structure heat storage of inner where most temperature-sensitive are mounted. One- two-nodal analysis methods used former latter concepts, respectively, to clarify combinations optical properties structures range components. Finally, multinodal is performed detail based on clarified from...