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Related Concept Videos

Cranial Nerves: Types Part I01:14

Cranial Nerves: Types Part I

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Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves, with the first six being essential in sensory perception, motor control, and autonomic functions related to the head and neck.
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Cranial Nerves: Overview and Anatomy01:19

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The cranial nerves are an important part of the complex network of nerves in the human body. These nerves emerge directly from the brain and are responsible for transmitting essential information between the brain and various parts of the head and neck. There are 12 pairs of cranial nerves, systematically numbered using Roman numerals from I to XII, beginning from the anterior and moving to the posterior of the brain. Each cranial nerve is uniquely identified by names that reflect its function...
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Cranial Nerves: Types Part II01:22

Cranial Nerves: Types Part II

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Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves. While the first six innervate the head and neck, the latter six nerves innervate the head and neck, as well as organs and tissues in the thoracic and abdominal cavities. They facilitate communication, expression, and autonomic control within the human body.
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Anatomy of the Eyeball01:20

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The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
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Vision01:24

Vision

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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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Muscles of the Eye01:20

Muscles of the Eye

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The muscles of the eye are sophisticated structures that control eye movement and focus, allowing for the precise and rapid adjustments necessary for vision. The human eye is controlled by ten muscles — six extraocular muscles, three intraocular muscles, and one primary eyelid retractor muscle.
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Updated: Mar 13, 2026

Optic Nerve Transection: A Model of Adult Neuron Apoptosis in the Central Nervous System
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Optic Nerve.

Lynn K Gordon1

  • 1Stein Eye Institute, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA. lgordon@ucla.edu.

Handbook of Experimental Pharmacology
|October 28, 2016
PubMed
Summary
This summary is machine-generated.

This chapter reviews common optic neuropathies, including their causes, symptoms, and treatments. Recognizing treatable conditions is crucial for preserving vision and improving patient prognosis.

Keywords:
Hereditary optic neuropathyIdiopathic intracranial hypertensionIschemiaOptic nerveOptic neuritisTraumaTumor

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Area of Science:

  • Ophthalmology
  • Neurology

Background:

  • Optic nerve diseases stem from diverse causes like inflammation, tumors, genetics, infections, ischemia, and unknown factors.
  • Understanding common optic neuropathies aids in patient management and prognosis.

Purpose of the Study:

  • To discuss characteristics and therapeutic approaches for common optic neuropathies.
  • To highlight treatable or preventable conditions for vision preservation.

Main Methods:

  • Review of several optic nerve diseases.
  • Presentation of signs, symptoms, diagnostic criteria, and therapies for each condition.

Main Results:

  • Discussion includes idiopathic intracranial hypertension, optic neuritis, ischemic optic neuropathies, hereditary optic neuropathies, trauma, and optic nerve tumors.
  • Evaluation and diagnostic criteria are highlighted where applicable.

Conclusions:

  • Early recognition of specific optic neuropathies is vital for effective treatment and visual recovery.
  • Knowledge of disease characteristics and therapies improves patient outcomes and understanding of prognosis.