Blar i NTNU Open på forfatter "Chu, Xi"
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Antennal-lobe neurons in the moth Helicoverpa armigera: Morphological features of projection neurons, local interneurons, and centrifugal neurons
Kymre, Jonas Hansen; Berge, Christoffer Nerland; Chu, Xi; Ian, Elena; Berg, Bente Gunnveig (Peer reviewed; Journal article, 2020)The relatively large primary olfactory center of the insect brain, the antennal lobe (AL), contains several heterogeneous neuronal types. These include projection neurons (PNs), providing olfactory information to higher‐order ... -
Behavioral response is absent under the mating competition in rats (Rattus norvegicus)
Chu, Xi; Ågmo, Anders j (Journal article; Peer reviewed, 2019)Sexually receptive female rats normally copulate with several males during estrus, and multiple paternity is common. Sperm competition is therefore likely to occur. One response to competitive mating is to enhance sperm ... -
Brain Investigation on Sexual Dimorphism in a Gynandromorph Moth
Ian, Elena; Chu, Xi; Berg, Bente Gunnveig (Peer reviewed; Journal article, 2022)Simple Summary The noctuid moth, Helicoverpa armigera, is one of the globally most damaging agricultural pest insects. Generally, exploration of the male- and female-specific neural architecture underlying its reproductive ... -
Distinct protocerebral neuropils associated with attractive and aversive female-produced odorants in the male moth brain
Kymre, Jonas Hansen; Liu, Xiaolan; Ian, Elena; Berge, Christoffer Nerland; Wang, Guirong; Berg, Bente Gunnveig; Zhao, Xincheng; Chu, Xi (Peer reviewed; Journal article, 2021)The pheromone system of heliothine moths is an optimal model for studying principles underlying higher-order olfactory processing. In Helicoverpa armigera, three male-specific glomeruli receive input about three female-produced ... -
Electrophysiological properties of local interneurons in the primary olfactory center of the moth brain
Holm, Sara (Master thesis, 2021)Et av de mest avgjørende målene innen nevrovitenskap er å oppnå en forståelse av nevrale kretser, spesielt de generelle prinsippene som ligger til grunn for hvordan signaler blir behandlet lokalt. Denne typen forståelse ... -
Evaluation of Sexual Behavior in Laboratory vs Seminatural Conditions
Chu, Xi; Ågmo, Anders j (Chapter, 2023)Sexual behavior is, by necessity, sexually dimorphic. Males transfer sperm to females, whereas females receive sperm from males. Discussions of sex differences in copulatory behavior are consequently trivial. However, the ... -
Functional map of the macroglomerular complex of male Helicoverpa armigera
Liu, Xiaolan; Chu, Xi; Sun, Long-Long; Wang, Ya-Nan; Xie, Gui-Ying; Chen, Wen-Bo; Liu, Yang; Berg, Bente Gunnveig; An, Shi-Heng; Wang, Gui-Rong; Yin, Xin-Ming; Zhao, Xin-Cheng (Peer reviewed; Journal article, 2022)The mechanism of sex pheromone reception in the male cotton bollworm Helicoverpa armigera has been extensively studied because it has become an important model system for understanding insect olfaction. However, the pathways ... -
Neuronal architecture of the second-order CO2 pathway in the brain of a noctuid moth
Chu, Xi; KC, Pramod; Ian, Elena; Kvello, Pål; Liu, Yand; Wang, Guirong; Berg, Bente Gunnveig (Peer reviewed; Journal article, 2020)Many insects possess the ability to detect fine fluctuations in the environmental CO2 concentration. In herbivorous species, plant-emitted CO2, in combination with other sensory cues, affect many behaviors including foraging ... -
A novel major output target for pheromone-sensitive projection neurons in male moths
Chu, Xi; Heinze, Stanley; Ian, Elena; Berg, Bente Gunnveig (Peer reviewed; Journal article, 2020)Even though insects have comparably small brains, they achieve astoundingly complex behaviors. One example is flying moths tracking minute amounts of pheromones using olfactory circuits. The tracking distance can be up to ... -
Organization of the parallel antennal-lobe tracts in the moth
Kymre, Jonas Hansen; Chu, Xi; Ian, Elena; Berg, Bente Gunnveig (Peer reviewed; Journal article, 2022)The olfactory pathways of the insect brain have been studied comprehensively for more than 40 years, yet the last decade has included a particularly large accumulation of new information relating to this system’s structure. ... -
Rapid changes in sociosexual behaviors around transition to and from behavioral estrus, in female rats housed in a seminatural environment
Le Moene, Olivia; Hernandez-Arteaga, Enrique; Chu, Xi; Ågmo, Anders j (Peer reviewed; Journal article, 2020)Gonadally intact female rats display sexual behaviors only during a portion of the estrus cycle. In standard experimental setups, the on- and offset of sexual behavior is gradual. However, in naturalistic settings, it is ... -
Rat ultrasonic vocalizations and novelty-induced social and non-social investigation behavior in a seminatural environment
Heinla, Indrek; Chu, Xi; Ågmo, Anders j; Snoeren, Eelke (Peer reviewed; Journal article, 2021)Although rats are known to emit ultrasonic vocalizations (USVs), it remains unclear whether these calls serve an auditory communication purpose. For USVs to be part of communication, the vocal signals will need to be a ... -
Revisiting the Labial Pit Organ Pathway in the Noctuid Moth, Helicoverpa armigera
KC, Pramod; Chu, Xi; Kvello, Pål; Zhao, Xin-Cheng; Wang, Gui-Rong; Berg, Bente Gunnveig (Peer reviewed; Journal article, 2020)Lepidopteran species detect CO2 via a specialized organ located on the peripheral segment of the labial palps, the labial palp pit organ (LPO). Based on tracing of LPO sensory neurons targeting one distinct antennal-lobe ... -
Seeing Odors and Smelling Light - Multimodal Processing in Higher Order Brain Regions
Haug, Mikkel N. (Master thesis, 2024)Sensorisk informasjonsprosessering er avgjørende for navigasjon hos alle organismer, fra de minste encellede organismene til flercellede mennesker. Selvom forskningen på enkelt-sensoriske modaliteter har avansert vår ... -
Sexual Incentive Motivation and Copulatory Behavior in Male Rats Treated With the Adrenergic α2-Adrenoceptor Agonists Tasipimidine and Fadolmidine: Implications for Treatment of Premature Ejaculation
Lehtimäki, Jyrki; Ventura-aquino, Elisa; Chu, Xi; Paredes, Raul G.; Ågmo, Anders (Peer reviewed; Journal article, 2021)Background Premature ejaculation is the most common sexual dysfunction in young men, and it often leads to reduced relationship satisfaction and quality of life. Aim To determine the role of central and peripheral ... -
Sexual incentive motivation and male and female copulatory behavior in female rats given androgen from postnatal day 20
Chu, Xi; Snoeren, Eelke; Södersten, Per; Ågmo, Anders j (Peer reviewed; Journal article, 2021)Masculinization and feminization of rat sexual behavior has been supposed to occur during a short postnatal period. However, much data have made it evident that these processes may continue until adolescence. In the present ... -
Spontaneous spiking activity in morphologically characterized neuron categories
Kymre, Jonas Hansen (Master thesis, 2017)Individual neurons can be characterized by their electrophysiological activity. Such characterizations have helped researchers investigate the functioning of individual neurons and neural networks consisting of distinct ... -
The Neural connections between the primary olfactory center and higher brain regions in the male moth : morphological and physiological properties of projection neurons and centrifugal neurons
Berge, Christoffer Nerland (Master thesis, 2018)In the insect brain, different types of neurons provide input and output to the primary olfactory center, the antennal lobe. The principal output neurons, projection neurons, convey odor information from the antennal lobe ... -
Volatile Relationships Signal interactions of CO2 and plant odorants in the primary olfactory processing center of the moth Helicoverpa armigera
Griffin, Anjela Brianne (Master thesis, 2024)Karbondioksid er kjent for å være et viktig molekyl i mange insekters sanseverden, og møllen H. armigera er intet unntak. Denne studien undersøker signalinteraksjonene mellom CO2 og plantelukt-stoffer i en distinkt populasjon ...