Ansa Cervicalis Strap Muscles — FRCA Primary MCQ
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Correct answer: E — Infrahyoid (strap) muscles of the neck
The ansa cervicalis (C1-C3) is a loop of nerves embedded in the anterior wall of the carotid sheath. It supplies the infrahyoid strap muscles: sternohyoid / sternothyroid / and omohyoid (inferior belly). The thyrohyoid is supplied by C1 fibres travelling with the hypoglossal nerve. The strap muscles depress the hyoid and larynx.
Reference: RCoA 2021 Primary FRCA Curriculum