Podcast
Questions and Answers
What is the origin of the digastric muscle?
What is the origin of the digastric muscle?
Which muscle is primarily responsible for depressing the hyoid bone?
Which muscle is primarily responsible for depressing the hyoid bone?
What is the innervation for the mylohyoid muscle?
What is the innervation for the mylohyoid muscle?
Where do the infrahyoid muscles generally insert?
Where do the infrahyoid muscles generally insert?
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Which muscle's innervation is primarily by ansa cervicalis?
Which muscle's innervation is primarily by ansa cervicalis?
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Study Notes
Digastric Muscle Origin
- The digastric muscle has two bellies, anterior and posterior, separated by an intermediate tendon.
- The posterior belly originates from the mastoid notch of the temporal bone.
- The anterior belly originates from the digastric fossa on the inner surface of the mandible.
Hyoid Bone Depression
- The primary muscle responsible for depressing the hyoid bone is the sternohyoid muscle.
Mylohyoid Muscle Innervation
- The mylohyoid muscle is innervated by the mylohyoid nerve, a branch of the inferior alveolar nerve (V3).
Infrahyoid Muscle Insertions
- The infrahyoid muscles generally insert on the hyoid bone.
- They contribute to hyoid bone depression and stability.
Ansa Cervicalis Innervation
- The omohyoid, sternohyoid, and sternothyroid muscles are primarily innervated by the ansa cervicalis.
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Description
Test your knowledge on the anatomy of the digastric and infrahyoid muscles. This quiz covers their origins, insertions, and innervation, providing a comprehensive understanding of these crucial muscles in the neck. Perfect for students of anatomy and physiology.
