Which branch of V1 supplies the most lateral portion of the upper eyelid?

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Prepare for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which branch of V1 supplies the most lateral portion of the upper eyelid?

Explanation:
The outermost part of the upper eyelid is supplied by the lacrimal nerve, a branch of the ophthalmic division of the trigeminal nerve. As the lacrimal nerve travels toward the lacrimal gland, it gives off lateral palpebral branches that innervate the lateral portion of the upper eyelid. In contrast, other branches of V1 mainly cover the central to medial regions: the supraorbital and supratrochlear nerves supply more medial and superior areas, and the infratrochlear nerve covers the medial canthus. So the lacrimal nerve provides the sensation for the most lateral part of the upper lid.

The outermost part of the upper eyelid is supplied by the lacrimal nerve, a branch of the ophthalmic division of the trigeminal nerve. As the lacrimal nerve travels toward the lacrimal gland, it gives off lateral palpebral branches that innervate the lateral portion of the upper eyelid. In contrast, other branches of V1 mainly cover the central to medial regions: the supraorbital and supratrochlear nerves supply more medial and superior areas, and the infratrochlear nerve covers the medial canthus. So the lacrimal nerve provides the sensation for the most lateral part of the upper lid.

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