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Questions and Answers
What is the origin of the digastric muscle?
What is the origin of the digastric muscle?
- Body of the hyoid bone
- Mental spines of the mandible (correct)
- Greater horn of the hyoid bone
- Mastoid notch of the temporal bone (correct)
Which muscle is primarily responsible for depressing the hyoid bone?
Which muscle is primarily responsible for depressing the hyoid bone?
- Geniohyoid
- Omohyoid (correct)
- Mylohyoid
- Sternohyoid (correct)
What is the innervation for the mylohyoid muscle?
What is the innervation for the mylohyoid muscle?
- Cervical plexus
- Ansa cervicalis
- Trigeminal nerve (V3) (correct)
- Facial nerve (VII)
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.
