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Neuron, Afferent

Neuron, Afferent: A type of neuron that transmits signals from sensory receptors or other neurons to the central nervous system.
Afferent neurons convey information about the internal and external environments, enabling the brain to perceive and respond to stimuli.
These neurons play a crucial role in sensory processing, including the senses of touch, sight, hearing, taste, and smell.
Afferent neurons are essential for maintaining homeostasis and facilitating appropriate physiological and behavioral responses.

Most cited protocols related to «Neuron, Afferent»

For in situ hybridization analysis, cryostat sections were hybridized using digoxigenin-labeled probes [45 (link)] directed against mouse TrkA or TrkB, or rat TrkC (gift from L. F. Parada). Antibodies used in this study were as follows: rabbit anti-Er81 [14 (link)], rabbit anti-Pea3 [14 (link)], rabbit anti-PV [14 (link)], rabbit anti-eGFP (Molecular Probes, Eugene, Oregon, United States), rabbit anti-Calbindin, rabbit anti-Calretinin (Swant, Bellinzona, Switzerland), rabbit anti-CGRP (Chemicon, Temecula, California, United States), rabbit anti-vGlut1 (Synaptic Systems, Goettingen, Germany), rabbit anti-Brn3a (gift from E. Turner), rabbit anti-TrkA and -p75 (gift from L. F. Reichardt), rabbit anti-Runx3 (Kramer and Arber, unpublished reagent), rabbit anti-Rhodamine (Molecular Probes), mouse anti-neurofilament (American Type Culture Collection, Manassas, Virginia, United States), sheep anti-eGFP (Biogenesis, Poole, United Kingdom), goat anti-LacZ [14 (link)], goat anti-TrkC (gift from L. F. Reichardt), and guinea pig anti-Isl1 [14 (link)]. Terminal deoxynucleotidyl transferase-mediated biotinylated UTP nick end labeling (TUNEL) to detect apoptotic cells in E13.5 DRG on cryostat sections was performed as described by the manufacturer (Roche, Basel, Switzerland). Quantitative analysis of TUNEL+ DRG cells was performed essentially as described [27 (link)]. BrdU pulse-chase experiments and LacZ wholemount stainings were performed as previously described [46 (link)]. For anterograde tracing experiments to visualize projections of sensory neurons, rhodamine-conjugated dextran (Molecular Probes) was injected into single lumbar (L3) DRG at E13.5 or applied to whole lumbar dorsal roots (L3) at postnatal day (P) 5 using glass capillaries. After injection, animals were incubated for 2–3 h (E13.5) or overnight (P5). Cryostat sections were processed for immunohistochemistry as described [14 (link)] using fluorophore-conjugated secondary antibodies (1:1,000, Molecular Probes). Images were collected on an Olympus (Tokyo, Japan) confocal microscope. Images from in situ hybridization experiments were collected with an RT-SPOT camera (Diagnostic Instruments, Sterling Heights, Michigan, United States), and Corel (Eden Prairie, Minnesota, United States) Photo Paint 10.0 was used for digital processing of images.
Publication 2005
Anabolism Animals Antibodies Apoptosis Bromodeoxyuridine Calbindins Calretinin Capillaries Cavia Cells Diagnosis Digoxigenin DNA Nucleotidylexotransferase Domestic Sheep Goat Immunohistochemistry In Situ Hybridization In Situ Nick-End Labeling LacZ Genes Lumbar Region Mice, House Microscopy, Confocal Molecular Probes Neurofilaments Neuron, Afferent Pulse Rate Rabbits Rhodamine rhodamine dextran Root, Dorsal Staining transcription factor PEA3 tropomyosin-related kinase-B, human
Sensory DRG neurons from Sprague-Dawley rats were isolated as described previously.9 (link),39 ,87 (link) Dorsal root ganglia were excised aseptically and placed in Hank buffered salt solution (HBSS, Life Technologies) on ice. The ganglia were dissociated enzymatically with collagenase A (1 mg/mL, 25 minutes, Roche) and collagenase D (1 mg/mL, Roche) with papain (30 U/mL, Roche) for 20 minutes at 37°C. To eliminate debris, 70 μm (BD Biosciences) cell strainers were used. The dissociated cells were resuspended in DMEM/F12 (Life Technologies) containing 1× pen-strep (Life Technologies), 1× GlutaMax, 3 μg/mL 5-FDU (Sigma), 7 μg/mL uridine (Sigma), and 10% fetal bovine serum (Hyclone). The cells were seeded on poly-d-lysine–coated coverslips (BD Falcon) and incubated at 37°C in a humidified 95% air/5% CO2 incubator.
Publication 2015
Cells collagenase 1 Fetal Bovine Serum Ganglia Ganglia, Spinal Hemoglobin, Sickle Lysine Neuron, Afferent Papain Poly A Rats, Sprague-Dawley Sodium Chloride Streptococcal Infections Uridine
Sensory DRG neurons from Sprague-Dawley rats were isolated as described previously [8 ; 21 (link)]. Dorsal root ganglia (from thoracic 2 to lumbar 6 spinal levels) were excised aseptically and placed in Hank buffered salt solution (HBSS, Life technologies) containing penicillin (100 U/mL) and streptomycin (100 µg/mL, Cat# 15140, Life technologies) on ice. The ganglia were dissociated enzymatically by a 45 min incubation (37°C) in a DMEM (Cat# 11965, Life technologies) solution containing neutral protease (3.125 mg.ml−1, Cat#LS02104, Worthington) and collagenase Type I (5 mg.ml−1, Cat# LS004194, Worthington). The dissociated cells were resuspended in complete DRG medium, DMEM containing penicillin (100 U/mL), streptomycin (100 µg/mL), 30 ng.ml−1 nerve growth factor and 10% fetal bovine serum (Hyclone). For Ca2+ imaging, the cells were seeded on poly-D-lysine (Cat# P6407, Sigma) coated glass coverslips (Cat# 72196-15, electron microscopy sciences) as a drop of 20 µl on the center of each coverslip, then placed in a 37°C, 5 % CO2 incubator for 45–60 min to allow cells to attach. Then the cultures were flooded by gently adding complete DRG medium on the edge of each well to avoid detaching any weakly adherent cell. For immunoblotting, dissociated DRG neurons from 1 rat, were plated in a poly-D-lysine coated 12 well plate and placed in a 37°C, 5 % CO2 incubator. All cells were used within 24 hours after seeding
Publication 2016
Cells collagenase 1 DRG1 protein, human Electron Microscopy Fetal Bovine Serum Ganglia Ganglia, Spinal Hemoglobin, Sickle Lumbar Region Lysine Neprilysin Nerve Growth Factors Neuron, Afferent Neurons Penicillins Poly A Rats, Sprague-Dawley Sodium Chloride Streptomycin

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Publication 2013
accutase Astrocytes Cells Dopaminergic Neurons Fibroblast Growth Factor 2 Growth Factor Heparin Laminin Motor Neurons Neuron, Afferent Neurons Oligodendroglia Ornithine Poly A polyornithine Striatum, Corpus

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Publication 2012
Action Potentials Animals ARID1A protein, human Bicarbonate, Sodium Cells C Fibers Egtazic Acid Electric Conductivity Enzymes Epineurium Ganglia Glucose HEPES Inflammation Mediators Magnesium Chloride Microelectrodes Microscopy Neuron, Afferent Neurons Nylons Protoplasm Pulses Root, Dorsal Satellite Glia Sodium Chloride Suction Drainage Ventral Roots

Most recents protocols related to «Neuron, Afferent»

In this mouse model, the Cre-mediated recombination of Adam23 was tissue-specific and confined to Parvalbumin (Pv)-positive cells such as the interneurons in the brain and the large-diameter proprioceptive afferent sensory neurons of the dorsal root ganglia (de Nooij et al., 2015 (link)). The parvalbumin promoter of the Cre knockin allele directs Cre recombinase expression in Pv-expressing cells (Hippenmeyer et al., 2005 (link)). The allele, originally denoted as Pvalbtm1(cre)Arbr is referred to here as PvCre. Mice expressing PvCre were crossed with Adam23LoxP/LoxP mice, leading to Cre-mediated recombination of Adam23 in Pv-positive tissue. PvCre:Adam23LoxP/LoxP mice are referred to as Adam23PvKO/PvKO.
Publication 2023
Alleles Brain Cells Cre recombinase Ganglia, Spinal Interneurons Mice, Laboratory Neuron, Afferent Parvalbumins Proprioception Recombination, Genetic Tissues Tissue Specificity
Here, the current-based leaky integrate-and-fire (C-LIF) neuron model (Gütig, 2016 (link)) is used as the basic computational unit in SCTN. Assuming there are N afferent neurons, the voltage of the C-LIF spiking neuron can be calculated as:
Vt=Lt-Et
Lt=i=1Nwitij<tK(t-tij)
Et=ϑtsj<texp(-t-tsjαm)
K(t-tij)=V0[exp(-t-tijαm)-exp(-t-tijαs)]
where wi is the synaptic efficacy, tij denotes the time of the j-th input spike from the i-th afferent neuron, and tsj denotes the time of the j-th firing spike. Each spike at time tij contributes a postsynaptic potential (PSP), whose shape is determined by the double exponential kernel function K(t-tij) . V0 is a normalization factor that normalizes the maximum value of the kernel to 1. αm, αs mean the time decay factors, which are learnable parameters in SCTN. ϑ denotes the threshold of the neuron and it is equal to 0.5 in our experiments. Lt is the dynamics of the leaky integrate-and-fire (LIF) neuron model (Gerstner and Kistler, 2002 (link)), which describes the input synaptic current from N presynaptic neurons. Compared with the LIF model, the C-LIF model has one more reset item Et, indicating that each output spike will suppress the voltage for a moment. For C-LIF model, a spike is triggered when Vt exceeds ϑ and then Vt is reset.
Publication 2023
Neuron, Afferent Neurons Postsynaptic Potentials
We used two-tailed, paired t tests to compare the mean signal during stimulus presentation with an unstimulated period of identical length within the same neuron. Neurons were tested for both ON and OFF responses. The P values were corrected for multiple testing using false discovery rate (76 ). To test for asymmetric neuron responses, we used two-tailed, two-sample t tests (unpaired). Sensory neuron responses to all conditions are publicly available at this data repository, together with plots of average responses, phase trajectories, and time trace correlation matrices.
Publication 2023
Conditioned Reflex Neuron, Afferent Neurons
The primary objective of the study was to understand how the 11 chemosensory neuron pairs in C. elegans encode odorant identity and intensity. We developed a transgenic nematode in which all of the ciliated sensory neurons were fluorescently labeled with GCaMP, allowing the activity of the 11 chemosensory neuron pairs to be recorded from simultaneously. We assembled a broad panel of 23 volatile odorants and five pheromones and used a microfluidic device to present these stimuli to nematodes. We used confocal microscopy to record from chemosensory neurons as odorant stimuli at multiple concentrations were presented.
Publication 2023
Animals, Transgenic Microchip Analytical Devices Microscopy, Confocal Nematoda Neuron, Afferent Neurons Odorants Pheromone
The antennal nerves of centipedes were isolated. The sensory neurons were acutely dissociated and harvested in a serum-free medium for enzymatic digestion (a combination of collagenase and trypsin) according to procedures as previously described (25 (link)). These isolated neurons were incubated at 27 °C for 6 h (5% CO2) before calcium imaging. The antennal neurons or HEK293 cells (described below) were loaded with Fluo-4 acetoxymethyl in 2 mM Ca2+ Ringer’s solution, which contained 140 mM NaCl, 5 mM KCl, 2 mM MgCl2, 10 mM glucose, 2 mM CaCl2, and 10 mM 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) (pH 7.2). Fluorescence images of antennal neurons and HEK293 cells were acquired with an Olympus IX73 microscope with a Hamamatsu R2 charge-coupled device camera controlled by MetaFluor software (Molecular Devices). The bathing solution with different pH values (135 mM NaCl, 5 mM KCl, 2 mM MgCl2, 10 mM glucose, 4 mM CaCl2, and 10 mM HEPES) was used to elicit calcium signals. Fluo-4 was excited using an light emitting diode light source (X-Cite 120LED, Lumen Dynamics) with a 500/20-nm excitation filter, while fluorescence emission was detected with a 535/30-nm emission filter. Fluorescence images were acquired with automated routines written in MetaMorph software (Molecular Devices) and analyzed with Igor Pro (WaveMetrics). To heat the cells by perfusion, temperature control was achieved by perfusion of preheated solutions. Solutions were heated with an SHM-828 heater controlled by a CL-100 temperature controller (Harvard Apparatus). The glass slide or patched pipette was placed about 1 mm from the solution output port. A TA-29 miniature bead thermistor was placed right next to the pipette to ensure accurate monitoring of local temperature. The thermistor’s temperature readout was fed into an analog input of the patch amplifier and recorded simultaneously with current.
Publication 2023
Acids Calcium Chilopoda Collagenase Digestion Enzymes Fluo 4 Fluorescence Glucose HEK293 Cells HEPES Light Magnesium Chloride Medical Devices Microscopy Nervousness Neuron, Afferent Neurons Perfusion Ringer's Solution Serum Sodium Chloride Trypsin

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Neurobasal medium is a cell culture medium designed for the maintenance and growth of primary neuronal cells. It provides a defined, serum-free environment that supports the survival and differentiation of neurons. The medium is optimized to maintain the phenotypic characteristics of neurons and minimizes the growth of non-neuronal cells.
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More about "Neuron, Afferent"

Afferent neurons, also known as sensory neurons or receptor neurons, are a type of neuron that transmit signals from sensory receptors or other neurons to the central nervous system.
These neurons play a crucial role in sensory processing, enabling the brain to perceive and respond to both internal and external stimuli.
They are essential for maintaining homeostasis and facilitating appropriate physiological and behavioral responses.
Afferent neurons convey information about various senses, including touch, sight, hearing, taste, and smell.
They transmit signals from receptors, such as mechanoreceptors, photoreceptors, and chemoreceptors, to the central nervous system, where the information is processed and interpreted.
In addition to their sensory functions, afferent neurons are also involved in proprioception, the awareness of the position and movement of the body.
They receive inputs from muscle spindles, Golgi tendon organs, and joint receptors, providing the brain with information about the body's position and movement.
The study of afferent neurons and their function is crucial for understanding various neurological and sensory disorders, as well as for developing treatments and therapies.
Techniques such as L-glutamine, PClamp 10 software, and the use of Neurobasal medium, Laminin, and Poly-D-lysine are commonly employed in the research and analysis of afferent neurons.
Furthermore, the application of NGF (Nerve Growth Factor), Trypsin-EDTA, HBSS, and DMEM/F12 media are also important in the culturing and maintenance of afferent neurons for experimental purposes.
By understanding the role and function of afferent neurons, researchers can gain valuable insights into the mechanisms of sensory perception, neural communication, and the overall functioning of the nervous system.