Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
Branchial Arch 1
Cartilage |
Meckel's Cartilage:
Mandible, Malleus, Incus, spheno-mandibular ligament. |
|
Branchial Arch 1
Muscle |
Muscle of mastication: Masseter, temporalis, lateral and medial pterygoids
mylohyloids, anterior belly of digastric, tensor tympani, tensor veli palatini, anterior 2/3 of tongue. |
|
Branchial Arch 1
Innervation |
CN V2 and V3
|
|
Branchial Arch 1
Pathology |
Treacher Collins Syndrome:
mandibular hyperplasia, facial abnormalities |
|
Branchial Arch 1
Arteries |
Maxillary artery (branch of external carotid)
|
|
Branchial Arch 2
Cartilage |
Reichert's cartilage:
Stapes, Styloid Process, lesser horn of hyoid bone, stylo-hyloid ligament |
|
Branchial Arch 2
Muscles |
Muscles of facial expression, stapedius, stylohyloid, and posterior belly of digastric
|
|
Branchial Arch 2
Innervation: |
CN VII
|
|
Branchial Arch 2
Arteries: |
Stapedial Artery, Hyoid Artery
|
|
Branchial Arch 3
Cartilage: |
greater horn of hyoid
|
|
Branchial Arch 3:
Muscles: |
Stylopharyngeus (think of which nerve its innervated by)
|
|
Branchial Arch 3:
Innervation |
CN IX
|
|
Branchial Arch 3:
Pathology |
congenital pharyngocutaneous fistula: persistance of cleft and pouch --> fistula between tonsillar area, cleft in lateral neck
|
|
Branchial Arch 4-6
Cartilage |
thyroid, cricoid cartilage, arytenoids, corniculate,cuneiform
|
|
Branchial Arch 4
Muscles |
most pharyngeal constrictors, cricothyroid, levator veli palatini
|
|
Branchial Arch 6
Muscles |
all intrinsic muscles of larynx except cricothyroid
|
|
Branchial Arch 4:
Innervation: |
CN X. superior laryngeal branch- swallowing
|
|
Branchial Arch 6:
Innervation: |
CN X. recurrent laryngeal branch- speaking
|
|
Branchial Arch 3 and 4 develop into:
|
form posterior 1/3 of tongue
|
|
Branchial cleft 1:
|
external auditory meatus
|
|
Branchial cleft 2-4 derivatives:
|
make temporary cervical sinuses, which are then destroyed by proliferation of 2nd arch mesenchyme. if the cleft persists: branchial cleft cyst in lateral neck
|
|
Branchial Pouch 1:
|
middle ear, eustachian tube, mastoid air cells.
contribute to endoderm-lined structures. |
|
Branchial Pouch 2:
|
epithelial lining of palatine tonsil
|
|
Branchial Pouch 3:
|
dorsal wings- inferior parathyroids
ventral wings- thymus. these end up BELOW the 4th pouch structures |
|
Branchial Pouch 4:
|
dorsal wings: superior parathyroids
|
|
Branchial Pouch 3 and 4
Pathology: |
aberrant development of 3rd and 4th pouches lead to DiGeorge syndrome:
t-cell deficiency ( because of thymic aplasia) and hypocalcemia (because of failure of parathyroid to develop) |
|
MEN 2A:
multiple endocrine neoplasms: |
mutation of germline RET (neural crest cells)
adrenal medulla- pheochromocytoma parathyroid tumor- 3rd and 4th branchial pouch parafollicular cells (medullary thryoid cancer)- 4th and 5th branchial pouch. |