Tongue muscle derived from:: (A) Occipital myotomes, (B) Somites, (C) Endoderm of pharyngeal pouch, (D) Mesoderm of pharyngeal pouch
Answer is A. Ans. a. Occipital myotomesThe paraxial mesoderm organizes into segments known as somitomeres, which form in a craniocaudal sequence.Somites differentiate into the:Sclerotome: Cartilage and bone componentMyotome: Muscle componentDermatome: Dermis of skin componentTongue muscles are derived from occipital myotomes. The tongue muscles are innervated by CN XII.Extraocular muscles are derived from somitomeres 1-3 and 5. Somitomeres 1-3 are called preotic myotomes. The extraocular muscles are innervated by cranial nerve (CN) III, CN IV, and CN VI.Head and neck musculature is derived from somitomeres 1-7 of the head and neck region, which participate in the formation of the pharyngeal arches.