EMBRYOLOGY
PHARYNGEAL ARCHES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Muscles of facial expression are derived from:
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1st arch
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2nd arch
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3rd arch
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4th arch
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Explanation:
Detailed explanation-1: -The muscles of facial expression are derivatives of the 2nd pharyngeal arch and are innervated by facial nerve (CN VII). These muscles originate from bone or fascia and insert on skin to provide the movements of facial expression.
Detailed explanation-2: -The muscles of facial expression (also known as the mimetic muscles) can generally be divided into three main functional categories: orbital, nasal and oral. These striated muscles broadly originate from the surface of the skull and insert onto facial skin.
Detailed explanation-3: -The Muscles of Facial Expression-Orbital Group-Nasal Group-Oral Group-TeachMeAnatomy.
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