Optic Nerve Constriction
Optic Nerve Constriction - Related Videos
08:23
Chronic Constriction of the Sciatic Nerve and Pain Hypersensitivity Testing in Rats
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Cited by 151 •
2012
Due to the simplicity of surgery and the robust behavioural outcome, chronic constriction of the sciatic nerve is one of the pre-eminent animal models of neuropathic pain. Within 24 hrs following surgery, pain hypersensitivity is established and can be quantitatively measured using a von Frey aesthesiometer (mechanical test) and plantar analgesia meter (thermal test).
04:39
Induction of Neuropathic Pain in a Rat Model by Constriction of the Infraorbital Nerve
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2025
Source: Deseure, K., et al. Chronic Constriction Injury of the Rat's Infraorbital Nerve (IoN-CCI) to Study Trigeminal Neuropathic Pain. J. Vis. Exp. (2015).This video demonstrates a method to induce neuropathic pain in a rat model by constricting the infraorbital nerve. After exposing the infraorbital nerve and tying ligatures to constrict it, the immune response at the injury site increases the excitability of neighboring neurons, which transmit pain signals to the brain.
10:52
Chronic Constriction Injury of the Rat's Infraorbital Nerve (IoN-CCI) to Study Trigeminal Neuropathic Pain
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Cited by 45 •
2015
This manuscript describes a rodent model to study trigeminal neuropathic pain. The methods described include surgical procedures to perform a chronic constriction injury of the rat’s infraorbital nerve and the post-surgical behavioral tests to measure the changes in spontaneous and evoked behavior that are indicative of persistent pain and allodynia.
02:24
Inducing Local Demyelination in the Optic Nerve Using Lysolecithin
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2025
This video demonstrates the procedure of surgically accessing the optic nerve in an anesthetized animal and precisely delivering lysolecithin to induce focal demyelination, creating neuropathological conditions for further study.
07:34
Minimally-invasive Technique for Injection into Rat Optic Nerve
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Cited by 4 •
2015
Direct injection into the rat optic nerve is useful for regenerative research. We demonstrate a minimally-invasive technique for direct injection into a rat optic nerve that does not involve opening the skull. Using this method, surgical complications are minimized and recovery is more rapid.
FAQs
Mechanical stress can disrupt the normal operation of retinal axons in more than one way. It may interfere with axonal transport, the movement of materials along nerve fibers, while also restricting local blood supply. Together, these effects can compromise the nerve’s ability to transmit visual signals and help explain why structural pressure may lead to impaired vision.
Axonal transport supports communication and maintenance within nerve fibers, so disruption provides a mechanism linking physical compression with functional impairment. When transport is restricted, retinal axons may no longer maintain effective signal transmission between the eye and brain. Studying this relationship helps researchers connect structural changes in the nerve with consequences for visual function.
Researchers can focus on the relationship between physical changes in the optic nerve, disrupted axonal transport, restricted local blood supply, and impaired visual signaling. This mechanistic pattern helps separate injury associated with nerve compression from visual disorders that may not involve the same structural or physiological changes. The distinction supports more precise interpretation of neural damage.
The process provides a framework for examining how pressure-related structural changes damage neural tissue and interfere with communication between the eye and brain. Researchers can then consider whether these effects reflect progressive neural deterioration, mechanisms of neurodegeneration, or opportunities for repair. Its value lies in connecting tissue stress with broader questions about neural injury and recovery.
Studies can examine how mechanical pressure changes the nerve, whether axonal transport becomes disrupted, and whether local blood supply is restricted. Researchers also assess how these changes affect visual signal transmission and vision. Considering these factors together provides a biological account of how altered nerve structure can produce functional consequences.
In biology, this framework allows investigators to study communication between the retina and brain when the connecting neural tissue is compromised. It supports analysis of pressure effects, structural nerve changes, visual impairment, injury mechanisms, and possible repair. These applications make the topic relevant to both neural tissue biology and the study of visual function.
Research can help explain why structural changes in the optic nerve may be accompanied by impaired vision and disrupted transmission of visual information. It can also clarify how pressure affects neural tissue through mechanical stress, altered axonal transport, or restricted local blood supply. These outcomes strengthen biological interpretations of optic nerve injury and degeneration.