The ansa cervicalis supplies all of the following muscles EXCEPT:

• A Sternohyoid
• B Sternothyroid
• C Omohyoid
• D Thyrohyoid ✓

Explanation

The ansa cervicalis, formed from the C1 to C3 ventral rami, innervates all infrahyoid muscles except the thyrohyoid. The thyrohyoid is supplied by fibres from C1 that travel briefly with the hypoglossal nerve before leaving it as a separate branch. This exception is examined repeatedly because students assume all four infrahyoid muscles share one nerve supply. Sternohyoid, sternothyroid and omohyoid are all supplied through the ansa.

Reference: Gray's Anatomy for Students, 4th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.