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UKCD Pharyngeal Arch

learning objectives for pharyngeal arches

QuestionAnswer
From which embryonic structures does the head and neck develop? The pharyngeal (branchial) arches
From which do these structures arise? Mesenchyme
What specific cells migrate to these arches to form the skeletal components of the face? Neural crest cells
List the cranial nerve associate with each pharyngeal arch. Pharyngeal arch I (CN V),Pharyngeal arch II (CN VII),Pharyngeal arch III (CN IX), Pharyngeal arch IV-VI (CN X – IV= superior laryngeal n., VI= recurrent laryngeal n.)
Which pharyngeal arch fails to develop into a head and neck structure? Pharyngeal arch V
Pharyngeal arches are covered externally by ______, separated by grooves called _________, and the mesenchyme of each arch is supported by __________. Ectoderm, pharyngeal clefts/grooves, cartilage
List the primary derivatives of arch 1. 1. malleus, incus, sphenomandibular ligament
List the primary derivatives of arch 2 2. stapes, styloid process, stylohyoid ligament, upper half of hyoid bone
List the primary derivatives of arch 3 3. lower half and greater horns (cornu) of hyoid bone
List the primary derivatives of arch 4 4. thyroid and epiglottic cartilage
List the primary derivatives of arch 6 5. cricoid, arytenoid and corniculate cartilages of larynx
WHat is the muscle derivative of arch 1? 1. mm. of mastication, anterior belly of digastrics, mylohyoid, tensor palate, tensor tympani
What is the muscle derivative of arch 2? 2. mm. of facial expression, stapedius, stylohyoid
What is the muscle derivative of arch 3? 3. stylopharyngeus, part id superior pharyngeal constrictor
What is the muscle derivative of arches 4-6? 4-6. mm. of larynx and remaining mm. of pharynx and soft palate
Created by: wiechartm
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