| Question | Answer |
| List the nerve, muscle, and skeletal element derived from the first pharyngeal arch | • Nerve: CNV Trigeminal (the maxillary and mandibular branches)
• Muscle: Mastication (Temporalis, masseter, mylohyoid, Ant. digastric, pterygoids, tensors)
• Skeletal: alishpenoid, incus (maxillary) and malleus, sphenomandibular ligament (mandibular |
| List the nerve, muscle, and skeletal element derived from the second pharyngeal arch | CNVII Facial Nerve. Muscles of facial expression ( stylohyoid, posterior digastricus, stapedius)Skeletal elements: Stapes, styloid process of the temporal bone, lesser horns and upper rim of hyoid bone, stylohyoid ligament. |
| List the nerve, muscle, and skeletal element derived from the third pharyngeal arch | • Nerve: CNIX Glossopharyngeal
• Muscle: Stylopharyngeus.
• Skeletal: Lower rim and greater horns of hyoid bone |
| List the nerve, muscle, and skeletal element derived from the fourth and sixth pharyngeal arches | CNX Vagus Nerve. Cricothyroid, palatal and pharyngeal, and intrinsic laryngeal muscles. Laryngeal cartilages. |
| List the nerve and muscle elements derived from the posterior pharyngeal arches | • Nerve: Spinal accessory nerve: CNXI
• Muscle: Sternocleidomastoid and Trapezius |
| List the derivatives of the first pharyngeal pouch | Auditory tube, middle ear, internal tympanic membrane. |
| List the derivatives of the second pharyngeal pouch | Palantine tonsils and tonsillar fossa |
| List the derivatives of the third pharyngeal pouch | Inferior parathyroid gland and thymus |
| Derivatives of the preotic somites and innervation | Muscles around the eye. It's innervated by CN III occulomotor, IV trochlear, and VI abducens. |
| Derivatives of the postotic somites and innervation | Tongue muscles. It's innervated by CN XII Hypoglossal. |
