Branchial/Pharyngeal Arch Derivatives Flashcards
Cartilage - Meckel’s Cartilage (Mandible, Malleus, incus, spheno-Mandibular ligament)
1st arch
Cartilage - Reichert’s Cartilage (Stapes, Styloid process, lesser horn of hyoid, Stylohyoid ligament)
2nd arch
Cartilage - greater horn of hyoid
3rd arch
Cartilage - thyroid, cricoid, arytenoids, corniculate, cuneiform
4th-6th arch
Muscles - Mastication (temporalis, masseter, lateral and medial pterygoids, myelohyoid, anterior belly or digastric, tensor tympani, tensor veli palatani)
1st arch
Muscles of facial expression (stapedius, stylohyoid, posterior belly of disgastric)
2nd arch
Muscles - stylopharyngeus
3rd arch
Muscles - most pharyngeal constrictors; cricothyroid, levator veli palatani
4th arch
Muscles - all intrinsic muscles of larynx except cricothyroid
6th arch
CN V2 and V3
1st arch
CN VII
2nd arch
CN IX
3rd arch
CN X, superior laryngeal branch
4th arch
CN X, recurrent branch
6th arch
The _______ branchial arch forms the anterior 2/3 of the tongue, which has sensory innervation from _________ and taste innervation from __________
1st
CN V3
CN VII
The ___ and ___ arches form the posterior 1/3 of the tongue, which has sensory AND taste innervation from ___ and at the extreme posterior via ___
3rd and 4th
CN IX
CN X
Motor innervation of the tongue is via ___
CN VII
Muscles of the tongue are derived from ____________
occipital myotomes
Failure of the fusion of the maxillary and medial nasal processes (primary palate)
Cleft lip
Failure of the fusion of the lateral palatine processes, the nasal septum, and/or the median palatine process (the formation of the secondary palate)
Cleft palate
