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Pharyngeal Arches

Embryology

QuestionAnswer
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.
Created by: bettyboucher
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