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Questions and Answers
What is the main function of the optic canal?
What is the main function of the optic canal?
- To regulate eye movement
- To separate the orbit from the cranial cavity
- To provide protection to the optic nerve and ophthalmic artery (correct)
- To connect the eye to the brain
Which of the following structures pass through the optic canal?
Which of the following structures pass through the optic canal?
- Sclera and cornea
- Retina and choroid
- Optic nerve and ophthalmic vein
- Optic nerve and ophthalmic artery (correct)
What is the connection provided by the optic canal?
What is the connection provided by the optic canal?
- Between the retina and the optic disc
- Between the orbit and the cranial cavity (correct)
- Between the eye and the nose
- Between the sclera and the cornea
What is the optic canal?
What is the optic canal?
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Why is the optic canal important?
Why is the optic canal important?
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What is the relationship between the optic canal and the cranial cavity?
What is the relationship between the optic canal and the cranial cavity?
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Study Notes
Nerves of the Orbit
- The orbit receives nerve supply from various cranial nerves, including:
- Cranial Nerve II (Optic Nerve)
- Cranial Nerve III (Oculomotor Nerve)
- Cranial Nerve IV (Trochlear Nerve)
- Cranial Nerve VI (Abducens Nerve)
Oculomotor Nerve (Cranial Nerve III)
- Innervates several muscles within the orbit, controlling:
- Eye movements
- Positioning
- Supplies muscles such as:
- Superior rectus
- Inferior rectus
- Medial rectus
- Inferior oblique
- Contributes to:
- Vertical eye movements
- Horizontal eye movements
- Rotational eye movements
- Provides structural support and helps maintain the integrity of these vital structures
Optic Canal
- An important anatomical structure through which:
- The optic nerve passes
- The ophthalmic artery passes
- Connects the orbit to the cranial cavity
- Provides protection to these vital structures
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