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[Mechanism of the development of neuroparalytic keratitis]
Abstract:
There is a hypothesis that for appearance of the neuroparalytic keratitis a decisive role has cessation of discharge of trophic factors, demonstrating a polypeptide nature. from sensitive nervous endings. In order to check the hypothesis, deafferentation of the eye has been performed by means of electrocoagulation of the trigeminal sensitive nucleus in the medulla oblongata. Despite the fact that as a result of the operation connection of the sensitive cells with the periphery is preserved, the neuroparalytic keratitis occurs at the same time, as after sectioning the trigeminal nerve branching. The suggestion on excessive discharge of catecholamines from the sympathetic terminals as the cause of deafferentational disorders is not confirmed. The eye desympathization does not prevent appearance of the neuroparalytic keratitis. It is supposed that discontinue of information current to the center makes regulation of the peripheral tissues homeostasis impossible, that is the cause of the trophic disturbance.
Insights
Neuroparalytic keratitis results from disrupted trophic factor discharge due to interrupted sensory information to the brain. This disruption impairs peripheral tissue homeostasis regulation.
Area of Science:
- Ophthalmology
- Neuroscience
- Physiology
Context:
- Neuroparalytic keratitis is a condition affecting the eye.
- The exact cause of neuroparalytic keratitis is not fully understood.
- Previous hypotheses suggested a role for trophic factors from sensitive nerve endings.
Purpose:
- To investigate the role of sensory nerve pathways in the development of neuroparalytic keratitis.
- To test the hypothesis that cessation of trophic factor discharge causes this condition.
- To explore alternative mechanisms, such as sympathetic nerve involvement.
Summary:
- Deafferentation of the eye by electrocoagulating the trigeminal sensitive nucleus was performed.
- Neuroparalytic keratitis developed despite preserved peripheral connections of sensitive cells.
- Disruption of sympathetic nerve function did not prevent keratitis, ruling out excessive catecholamine discharge.
Impact:
- The study suggests that interrupted sensory information to the central nervous system disrupts peripheral tissue homeostasis.
- This disruption is proposed as the primary cause of trophic disturbances leading to neuroparalytic keratitis.
- Findings challenge previous theories and highlight the importance of sensory input for maintaining ocular tissue health.