Motor innervation would be affected by damage to the cervical plexus in all of the following muscles EXCEPT:
  1. sternohyoid
  2. stylohyoid
  3. omohyoid
  4. sternothyroid
Explanation
Answer: B - The stylohyoid muscle is innervated by CN VII and is considered a suprahyoid muscle. Motor innervations from the cervical plexus include the genioglossus muscle (C1 by way of CN XII) and infrahyoid muscles.
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