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67 Cards in this Set
- Front
- Back
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Clefts are derived from this embryonic tissue
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Ectoderm
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Arches are derived from this embryonic tissue
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Mesoderm
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Pouches are derived from this embryonic tissue
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Endoderm
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External auditory meatus
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From 1st cleft
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These clefts are obliterated by proliferation of of 2nd arch mesenchyme; they may persist as cervical sinuses
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2nd through 4th clefts
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Location of persistent cervical sinuses from unobliterated 2nd, 3rd or 4th clefts
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Lateral neck (vs. thyroglossal duct remnant, which are medial)
Note that Zencker's are also laterally located |
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Middle ear
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From 1st pouch
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Structures derived from 1st cleft
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External auditory meatus
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Structures derived from 2nd cleft
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None (obliterated)
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Structures derived from 3rd cleft
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None (obliterated)
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Structures derived from 4th cleft
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None (obliterated)
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Structures derived from 1st pouch
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Middle ear cavity, eustachian tube, mastoid air cells
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Eustachian tube
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1st pouch
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Mastoid air cells
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1st pouch
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Structures derived from 2nd pouch
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Epithelial lining of palatine tonsil
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Epithelial lining of palatine tonsil
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2nd pouch
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Structures derived from dorsal wings of 3rd pouch
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Inferior parathyroids
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Structures derived from ventral wings of 3rd pouch
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Thymus
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Structures derived from 4th pouch
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Superior parathyroids
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DiGeorge
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Aberrant development of 3rd and 4th pouches
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Inferior parathyroids
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Dorsal wings of 3rd pouch
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Superior parathyroids
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4th pouch
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Thymus
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Ventral wings of 3rd pouch
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Innervation of 1st arch
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CN V2, V3
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Innervation of 2nd arch
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CN VII
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Innervation of 3rd arch
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CN IX
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Innervation of 4th arch
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CN X (superior laryngeal branch; swallowing)
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Innervation of 5th arch
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None (obliterated)
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Innervation of 6th arch
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CN X (recurrent laryngeal branch; speaking)
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Arch associated with chewing
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1st arch
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Arch associated with facial expression
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2nd arch
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Arch associated with stylopharyngeus
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3rd arch
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Arch associated with swallowing
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4th arch
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Arch associated with speaking
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6th arch
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Patient with mandibular hypoplasia, facial abnormalities
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Failure of 1st arch neural crest to migrate. Treacher Collins syndrome
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Temporalis muscle
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1st branchial arch
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Masseter
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1st branchial arch
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Laterl and medial pterygoid
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1st branchial arch
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Mylohyoid
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1st branchial arch
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Anterior belly of digastric
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1st branchial arch
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Tensor tympani
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1st branchial arch
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Tensor veli palatini
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1st branchial arch
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Anterior 2/3 tongue
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1st branchial arch
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Mandible
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1st branchial arch
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Malleus
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1st branchial arch
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Incus
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1st branchial arch
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Sphenomandibular ligament
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1st branchial arch
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Meckel's cartilage
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1st branchial arch. Forms mandible, malleus, incus, sphenomandibular ligament
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Reichert's cartilage
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2nd branchial arch. Forms stapes, styloid, lesser horn of hyoid, stylohyoid ligament
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Stapes
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2nd branchial arch
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Styloid process
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2nd branchial arch
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Lesser horn of hyoid
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2nd branchial arch
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Stylohyoid ligament
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2nd branchial arch
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Muscles of facial expression
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2nd branchial arch
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Stapedius
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2nd branchial arch
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Stylohyoid
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2nd branchial arch
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Posterior belly of digastric
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2nd branchial arch
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Greater horn of hyoid
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3rd branchial arch
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Stylopharyngeus
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3rd branchial arch
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Patient with fistula between tonsillar area and a cleft in the lateral neck
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Peristence of 3rd branchial cleft and pouch. Congenital pharyngocutaneous fistula
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Posterior 1/3 tongue
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3rd and 4th branchial arches
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Thyroid, cricoid, arytenoids, corniculate, cuneiform cartilage
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3rd and 4th branchial arches
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Cricothyroid muscle
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4th branchial arch
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Levator veli palatini
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4th branchial arch
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Tympanic membrane
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1st branchial membrane
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Pharyngeal constrictors (most)
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4th branchial arch
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All intrinsic muscles of the larynx except the cricothyroid
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6th branchial arch
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