The stylohyoid muscle is a small muscle from tympanohyoid and stylohyoid to basihyoid, superficial to the digastric muscle. In horses, the tendon is split by the passage of the intermediate tendon of the digastric muscle.
Origin: tympanphyoid and proximal end of stylohyoid
Insertion: lateral end of basihyoid
Action: raise the basihyoid bone
Nerve: facial nerve