Primary Sensory Neurons
Primary Sensory Neurons - Related Videos
16:03
The Culture of Primary Motor and Sensory Neurons in Defined Media on Electrospun Poly-L-lactide Nanofiber Scaffolds
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Cited by 33 •
2011
Aligned electrospun fibers direct the growth of neurons in vitro and are a potential component of nerve regeneration scaffolds. We describe a procedure for preparing electrospun fiber substrates and the serum-free culture of primary rat E15 sensory (DRG) and motor neurons. Visualization of neurons by immunocytochemistry is also included.
17:27
Preparation of Aplysia Sensory-motor Neuronal Cell Cultures
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Cited by 37 •
2009
Primary cultures of Aplysia sensory-motor neurons provide a model preparation for studying synapse formation and synaptic plasticity in vitro. This video demonstrates the identification and microdissection of sensory and motor neurons from Aplysia ganglia as well as the methods for establishing and maintaining sensory-motor neurons in culture.
04:11
Investigating the Origins of Sensory Neurons in the Dura Mater Using Fluorescence Microscopy
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2025
Source: Wang, J., et al. Visualizing the Calcitonin Gene-Related Peptide Immunoreactive Innervation of the Rat Cranial Dura Mater with Immunofluorescence and Neural Tracing. J. Vis. Exp. (2021). This video demonstrates a method to trace the origins of sensory neurons in the dura mater using fluorescence microscopy. A retrograde tracer is introduced into the exposed dura mater of an anesthetized rat. The tracer is taken up by sensory neuronal axons and travels retrogradely to their cell bodies...
07:55
In Vivo Calcium Imaging of Neuronal Ensembles in Networks of Primary Sensory Neurons in Intact Trigeminal Ganglia
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2025
This protocol describes in vivo GCaMP calcium imaging of intact trigeminal ganglion (TG) neurons. This description includes TG exposure surgery, in vivo confocal microscopy imaging of TG neurons, application of somatic stimuli during TG neurons microscopic imaging, and analysis of in vivo GCaMP calcium imaging data.
08:43
Primary Neuronal Cultures
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2023
The complexity of the brain often requires neuroscientists to use a simpler system for experimental manipulations and observations. One powerful approach is to generate a primary culture by dissecting nervous system tissue, dissociating it into single cells, and growing those cells in vitro. Primary cultures make neurons and glia easily accessible to the experimental tools required for techniques like genetic manipulation and time-lapse imaging. Furthermore, these cultures represent a highly...
FAQs
At a peripheral ending, the relevant stimulus first produces a receptor potential, a local change in membrane state. If that change reaches threshold, voltage-gated ion channels generate an action potential, converting a graded sensory event into a propagating neural signal. This sequence lets investigators connect stimulus detection with the timing of signals sent toward the central nervous system.
Different endings are associated with distinct stimulus classes, including mechanical, thermal, chemical, or damaging changes. The resulting receptor potentials provide the initial neural representation of those environmental or bodily events before signals reach central circuits. Comparing these inputs helps neuroscience studies examine how primary sensory neurons support touch, temperature, proprioception, and pain as related but distinguishable forms of sensation.
Signal routing depends on the neuron's position in the pathway. The cell body commonly lies in a dorsal root or cranial sensory ganglion, while the axon extends between the peripheral ending and a central terminal in the spinal cord or brainstem. At that terminal, neurotransmitter release activates second-order neurons, linking incoming activity to central processing.
Neural coding research focuses on how activity in these cells represents sensory events. Investigators can relate the type of peripheral stimulus to the receptor potential and then to action-potential signaling along the axon. Following that progression helps connect events at sensory endings with the information ultimately delivered to spinal cord or brainstem circuits.
A pathway-oriented study can organize analysis around successive anatomical points: the peripheral ending, axon, sensory ganglion, and central terminal. Researchers can then ask where stimulus conversion occurs, where action potentials propagate, and where neurotransmitter release activates second-order neurons. This framework links cellular events to the overall route of sensory information without treating sensation as a single site.
Research on primary sensory neurons has both explanatory and translational aims. Mapping their participation in touch, temperature, proprioception, and pain pathways helps clarify normal sensation, while examining sensory pathways can inform work on sensory disorders. Because central terminals activate second-order neurons, these pathways also provide a context for investigating analgesic therapies related to pain processing.