The nerve of the second branchial arch is
Each pharyngeal arch is characterized by its own muscular components. The muscular components of each arch have their own cranial nerve, and wherever the muscle cells migrate, they carry their nerve commponent with them. The neurons of 5th, 77th, 9th and 10th cranial sensory ganglia that supply the pharyngeal arch structures are derived from the ectodermal placodes (epipharyngeal placodes) and from the neural crest cells. Arch Nerve Skeletal derivatives Pouch Derivatives Muscle Derivatives Aery 1st (Mandibular arch) Trigeminal (V) Incus Malleus Anterior ligament of malleus Spine of sphenoid Sphenomandibular ligament Auditory tube Middle ear cavity Tensor tympani Muscles of mastication Mylohyoid Anterior belly of digastric Tensor veli palatini maxillary aery 2nd (hyoid arch) Facial (VII) Stapes Styloid process (temporal) Lesser cornu and upper hyoid Stylohyoid ligament palatine tonsil Tonsillar fossa Stapedius Stylohyoid Facial muscles (Buccinator, platysma, posterior belly of diagastric) Stapedial aery Hyoid aery 3rd Glossopharyngeal (IX) Greater cornu of hyoid Lower pa of hyoid pa Inferior parathyroids Thymus Stylopharyngeus Common carotid Proximal internal carotid aeries 4th Supeiror laryngeal of vagus (X) Thyroid cailage Corniculate cailage Cuneiform cailage Superior parathyroids Parafolliculae C cells of thyroid (from ultimobranchial body) Pharyngeal muscles Larynx-cricothyroid Levator veli palatini Right side : Right subclan aery (proximal poion) Left side: Arch of the aoa from the left common carotid to the left subclan aeries 6th Recurrent laryngeal nerve of Vagus (X) Arytenoid cailages All intrinsic muscles of the larynx (except the crciothyroid muscle) Right side: Right pulmonary aery Left side: Pulmonary aery and ductus aeriosus Ref: Langman's Medical embryology 14th edition Pgno: 284, 289
Glossopharygeal nerve
Trigeminal nerve
Facial nerve
Vagal nerve
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