Axon Projections
Axon Projections - Related Videos
11:56
Visualization of the Axonal Projection Pattern of Embryonic Motor Neurons in Drosophila
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Cited by 4 •
2017
This work details a standard immunohistochemistry method to visualize motor neuron projections of late stage-16 Drosophila melanogaster embryos. The filleted preparation of fixed embryos stained with FasII antibody provides a powerful tool to characterize the genes required for motor axon pathfinding and target recognition during neural development.
03:57
Visualization of Axonal Projection Patterns of Embryonic Motor Neurons in Drosophila
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2025
Source: Jeong, S. Visualization of the Axonal Projection Pattern of Embryonic Motor Neurons in Drosophila. J. Vis. Exp. (2017)This video demonstrates the visualization of axonal projections in Drosophila embryos. Immunolabeling of motor neurons, precise dissection to expose neuronal structures, and differential interference contrast microscopy collectively reveal detailed neuronal architecture, emphasizing the axonal projection patterns.
05:40
Visualizing Motor Neuron Projections and Axon Branching Using Light Sheet Fluorescence Microscopy
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2025
Source: Liau, E. S. et al. Visualization of Motor Axon Navigation and Quantification of Axon Arborization In Mouse Embryos Using Light Sheet Fluorescence Microscopy. J. Vis. Exp. (2018). This video demonstrates the use of light sheet fluorescence microscopy to image motor neuron projections and axon branching in transgenic mouse embryos. It outlines the steps involved in sample preparation, imaging, and 3D reconstruction of axonal branching for assessing motor neuron growth and connectivity.
08:37
Whole-mount Imaging of Mouse Embryo Sensory Axon Projections
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2014
We present here an optimized protocol to genotype, stain and prepare fetal mice for the imaging of peripheral nociceptor axon projections in the whole animal, as an effective method to assess sensory axon growth phenotypes in developing genetically engineered mice.
03:24
Two-Photon Laser Axotomy: A Method to Injure Axons in Zebrafish Embryos and Observe Axonal Recovery
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2023
This video describes the method to injure axons in zebrafish embryos using two photon laser axotomy and observing axonal recovery from injury.
FAQs
Growth cones detect chemical and physical guidance cues in the surrounding tissue and respond by changing the direction of axon growth. This coordinated navigation helps an axon follow an appropriate route rather than extend randomly. During development, the selected path determines which target cells the axon can approach and where subsequent synapse formation may occur.
Cytoskeletal changes provide the structural basis for extending and steering a growing axon. As the growth cone responds to environmental cues, adjustments in the cytoskeleton help redirect the advancing projection and maintain its growth. This mechanism connects external guidance information with physical movement, allowing axons to reach appropriate regions and support later neural connectivity.
Chemical and physical guidance cues represent different types of information available to a growing axon. Growth cones detect both, allowing the projection to integrate signals from its surrounding tissue when selecting a route. Their combined influence helps explain how axon paths become organized during development, rather than reflecting growth driven by a single environmental factor.
The route taken by an axon projection helps bring it into contact with an appropriate target cell. Once the projection reaches a suitable destination, its organization supports synapse formation, establishing a connection through which neural communication can occur. Thus, accurate navigation is linked to circuit assembly, because misplaced or incomplete projections can disrupt the intended pattern of connectivity.
Research on axon projections can clarify how neural circuits assemble, function, and adapt in both the brain and peripheral nervous system. Examining guidance, target approach, and synapse formation connects cellular development with larger patterns of neural communication. This perspective also supports investigation of developmental disorders, nerve injury, and efforts to restore disrupted connectivity.
Axon projections provide a way to examine how neural connectivity is disrupted after nerve injury and how it might be restored. Studying their development and guidance offers insight into strategies that promote axon regeneration and reestablish connections with appropriate targets. These questions are relevant to restoring communication in affected parts of the nervous system.