Nerve Coaptation
Nerve Coaptation - Related Videos
02:21
Direct Reconnection of Cervical Nerves to Restore Forelimb Mobility in a Mouse
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2025
Source: Gao, Z., et al. A Mouse Model of Direct Anastomosis via the Prespinal Route for Crossing Nerve Transfer Surgery. J. Vis. Exp. (2021).This video demonstrates restoring forelimb movement in a mouse via direct cervical nerve reconnection. It begins with a mouse with a paralyzed right forelimb due to a transected right C7 nerve at its nerve root. The left C7 nerve is severed, guided to the right via the prespinal route, and sutured with the right C7 nerve. The surgical site is then cleaned...
07:00
Novel Surgical Rodent Model for Studying Neuroma Pain Treatment Options using Targeted Muscle Reinnervation Through the Saphenous Nerve
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2025
This protocol presents a reproducible rat model using sensory nerves to mimic human neuroma pain and assess surgical treatments, offering a valuable tool for translational neuroma research.
02:50
Toluidine Blue Staining of Peripheral Nerve Sections: A Technique to Stain Myelinated Nerve Fibers For Peripheral Nerve Structure Visualization
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2025
This video demonstrates the staining technique of resin-embedded, osmium tetroxide-treated rat peripheral nerve sections using toluidine blue. The stained nerve sections help visualize the fine structures of peripheral nerves.
02:00
Vagus Nerve Stimulation via Chronically Implanted Peripheral Nerve Cuff Electrodes in Rats
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2025
Source: Sanchez, C. A., et al. Preparation of Peripheral Nerve Stimulation Electrodes for Chronic Implantation in Rats. J. Vis. Exp. (2020).This video demonstrates vagus nerve stimulation in an awake rat. A rat with an implanted chronic peripheral nerve cuff electrode and trained in a lever press task is connected to a stimulus generator via an implanted head cap. The vagus nerve is stimulated immediately after each successful lever press, resulting in the expansion of the motor map.
03:13
Construction of a Composite Regenerative Peripheral Nerve Interface in a Rat Model of Nerve Injury
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2025
Source: Svientek, S. R., et al. Fabrication of the Composite Regenerative Peripheral Nerve Interface (C-RPNI) in the Adult Rat. J. Vis. Exp. (2020).This video demonstrates the surgical construction of a composite regenerative peripheral nerve interface (C-RPNI) in a rat model of peripheral nerve injury. The procedure involves attaching a transected peroneal nerve to a muscle graft and overlaying it with a dermal skin graft to promote nerve regeneration. Over time, motor and sensory neurons...
FAQs
The repair brings the damaged nerve ends into precise continuity so regenerating axons have a pathway across the injury. Surgeons may align individual fascicles, which are organized bundles within a nerve, or approximate the outer nerve layers. This structural alignment supports later reinnervation, the process by which regenerating nerve fibers reconnect with target tissues.
Alignment helps preserve continuity between the injured nerve segments and can improve the opportunity for regenerating axons to cross the repair site. Depending on the injury and surgical approach, surgeons may focus on matching fascicles or bringing the outer nerve layers together. The intended outcome is improved recovery of sensation, muscle control, or other peripheral nerve functions.
Direct approximation is not sufficient when an injury leaves a gap between the nerve ends. In that situation, nerve grafts or conduits may be combined with the repair to bridge the separated segments and provide a route for axon regeneration. This distinction is important because the available tissue length determines whether the ends can be brought together directly.
Sutures, tissue adhesives, and other repair materials secure the approximated nerve structures and help maintain contact at the injury site. Their role is mechanical: they support alignment while the repaired nerve establishes continuity for axonal growth. The overview identifies these materials as alternatives used in microsurgical repair, without assigning one material as universally superior.
The essential workflow is to bring the injured nerve ends into accurate alignment, approximate the fascicles or outer nerve layers, and secure the connection with microsurgical sutures, tissue adhesives, or another repair material. If a gap prevents direct approximation, the repair may incorporate a nerve graft or conduit to connect the separated ends.
Clinicians may use this repair after traumatic nerve lacerations, during reconstruction following tumor removal, or as part of other reconstructive procedures. In each setting, the goal is to restore nerve continuity so regeneration can support return of peripheral nerve function. The approach may be adapted with grafts or conduits when the injury prevents direct connection.
Successful repair can promote reinnervation, allowing regenerating axons to reconnect with tissues that depend on the injured nerve. Depending on the affected nerve and the extent of injury, recovery may involve sensation, muscle control, or other peripheral nerve functions. These outcomes reflect restoration of communication across the repaired region rather than merely closing the wound.