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Showing 1 to 20 of 25 for “"ventral nerve cord"”.
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A phylogenetic evaluation of the nematode ventral nerve cord
Made available in DSpace on 2022-01-12T21:46:59Z (GMT). No. of bitstreams: 2 LANZATELLA-THESIS-2021.pdf: 1983330 bytes, checksum: 41b0fe932965dc4b0f203645333be418 (MD5) LICENSE.txt: 4215 bytes, checksum: cc3bbdaa203a8a809ac2f641f708fa79 (MD5) Previous issue date: 2021-07-22
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Neurotransmitter patterning in the embryonic ventral nerve cord of Drosophila melanogaster
… patterning in the first instar larval ventral nerve cord, and found indications that there is a higher ratio of inhibitory : excitatory neurons than might be expected. I also used these tools to characterise the neurotransmitter phenotype of various specific neuroblast lineages, …
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Visualization of neuronal geometry in ventral nerve cord ganglia of Acheta domesticus
… of innervation, or neuronal geometry, of various nerves leading to their respective ganglia (Fig. 1) and to obtain visualization of the finest terminal branches. A description of the cellular arrangement of a segmental ganglion would be of value in better understanding the results obtained when …
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Heartbeat rate modulation mediated by the ventral nerve cord in the honey bee, APIS MELLIFERA
… proving one mechanism or the other. Using the recording technique of impedance conversion, heartbeat patterns were established for intact Honey Bees during rest and also during nectar feeding and locomotion, activities that both result in modulating heartbeat. Heartbeat patterns were then …
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Identification and Characterization of Two Novel Sleep Promoting Neurons Located in the Ventral Nerve Cord of Drosophila Melanogaster
… and identified a pair of neurons in the ventral nerve cord, the equivalent of the fly's spinal cord, that modulate sleep when manipulated. Through immunohistochemical experiments and RNAi knockdown, we found that these cells use acetylcholine as their primary neurotransmitter. …
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HEM-protein regulates cell migration and asymmetric cell division during development of the ventral nerve cord in Drosophila melanogaster
… lineage, NB4-2→GMC-1→RP2/sib, in the ventral nerve cord (VNC) of the Drosophila embryo to investigate the regulation of neuronal migration and asymmetric cell division during development of the nervous system. I have discovered a migration defect of RP2 neurons in HEM-protein (Hem) …
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Extraction, processing, and analysis of multineuron data
… neurons. Multineuron data were extracellularly recorded from the ventral nerve cord of the cockroach, Periplaneta americana. The nerve cord contains 14 giant interneurons which mediate the wind-evoked directed escape response. The activity of the giant interneurons was observed and tested to …
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A study of productivity in Drosophila immigrans
… or chemical on the corpora allata via the ventral nerve cord.
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The Effects of Musical Intervals from Consonant to Dissonant on the Neural Activity of Earthworms
… Bidelman and Krishnan 2009). In this study, the ventral nerve cord of <em>Lumbricus terrestris</em> was exposed to six dichotic intervals in the form of vibrations through a bass actuator. Nerve activity was recorded for amplitude (mV), duration (ms), and maximum depolarization (mV) of the action …
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Investigation of the role of polyploidization in glial cells during the development of the drosophila nervous system
… by the second larval instar. The SPG in the ventral nerve cord and peripheral nervous system solely endocycle. We demonstrated that both the Notch signaling pathway and the String Cdc25 phosphatase are critical in determining whether SPG endocycle or endomitose. Experiments manipulating the …
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Male Influence on the Neuro-Endocrine Control of Egg Production in the Female Milkweed Bug, Oncopeltus fasciatus - Dallas
… male during copulation initiates impulses in the ventral nerve cord which activate neurosecretory cells of the brain. Brain hormones activate the corpora cardiac and corpora allata to produce factors which stimulate protein synthesis in the fat body and yolk deposition in the ovary with a …
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Chemesthesis in the Earthworm, Lumbricus terrestris: The search for TRP Channels
… techniques. We obtained responses from segmental nerves to tactile stimulus, 50mM AITC and pH 3.8, 4.0 and 4.2. Some cells in the epidermis displayed positive immunoreactivity for Drosophila and human TRPA1 homologs. L. terrestris detected and avoided ATIC and cinnamaldehyde (another TRPAI …
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Autonomous cricket biosensors for acoustic localization
… appears to be most reactive. Extracellular recording electrodes are permanently implanted into a cricket's ventral nerve cord to record the action potentials emanating from the cerci. In order to calibrate this system, we attempt to find the relationships between the frequency and direction of …
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Identification and characterization of components of rab-6-mediated trafficking in caenorhabditus elegans
… is localized to punctate structures along the ventral nerve cord and in the neuron soma. SAC-2::GFP localization to puncta in the soma is enhanced in rab-6.2(ok2254) null mutant animals, which is opposite to our expectation for RAB-6.2 retrograde cargo or effector molecules. Additionally, we …
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Analysis of the Molecular Mechanisms of Drosophila Antennal Lobe Development
… act as a ligand for Drl receptor in Drosophila ventral nerve cord. Our genetic analyses in the antennal lobe suggest a novel mechanism for the interaction of Wnt5 and Drl. Our data suggest that Drl antagonizes Wnt5. A genetic screen for suppressors of a Wnt5 gain-of-function phenotype in the …
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Defects in protein trafficking affect expression of GPCRs in C. elegans
… in the tail and each extends an axon along the ventral nerve cord to the head. Several G protein coupled receptors (EGL-47, SRA-6) are terminally expressed in PVQ as well as a limited number of other neurons. Mutations in six genes (tba-1, unc-14, unc-33, unc-44, unc-51, unc-119) known to …
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Plant-parasitic nematodes: from genomics to functional analysis of parasitism genes
… genes, and expression is localized to the ventral nerve cord and tissues surrounding the vulva. Predicted secondary structure is suggestive of a binding capacity with a yet unknown ligand. Further, the annotation of the complete mitochondrial (mt) genome of R. similis is reported. The mt …
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Discovery and Characterization of the Polycomb Repressive Complex 1 of C. Elegans
… of unc-3 in determining the fates of neurons in ventral nerve cord (VNC). unc-3 mutants are uncoordinated in locomotion. I show that unc-3 represses a VC-like motor neuron program in the VA and VB motor neurons, which in wild-type animals control backwards and forwards locomotion, respectively. …
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Exploiting the Power of Sleep to Rescue Long-Term Memory Defects in a Drosophila Memory Mutant
… centers examined, the dorsal fan-shaped body, ventral nerve cord – sleep promoting, and ventral fan-shaped body, restored courtship long-term memory only when activated both prior to and following training. We found that pre-training activation restored the ability of memory mutants to form …
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The Logic of Innately Aversive Olfactory Pathways
… converges with other descending neurons in the ventral nerve cord of the fly that are known to induce escape behaviours. We further find evidence of a learned innate interaction via memory input to this descending neuron, implicating this circuit in aversive memory recall. These findings extend …
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