NEET PG DENTAL EXAM

Detailed explanation-1: -The facial nerve is developmentally derived from the second pharyngeal arch, or branchial arch. The second arch is called the hyoid arch because it contributes to the formation of the lesser horn and upper body of the hyoid bone (the rest of the hyoid is formed by the third arch).

Detailed explanation-2: -In the second pharyngeal arch, Reichert’s cartilage develops into the stapes, styloid process, lesser horn of the hyoid and stylohyoid ligament. The muscles derived from this arch include the muscles of facial expression, stapedius, stylohyoid, platysma and posterior belly of the digastric.

Detailed explanation-3: -Second arch All of the pharyngeal muscles of the second pharyngeal arch are innervated by the facial nerve.

Detailed explanation-4: -The second pharyngeal arch forms the following muscles: the stapedius, stylohyoid, posterior belly of digastric muscle, auricular muscle and the muscles of facial expression.