Facial Development Flashcards
(32 cards)
Which bones of the inner ear are derived from Meckels cartilage
brachial arch cartilage #1: maleus and incus
What bone of the inner ear is derived from Reicharts cartilage
brachial arch cartilge #2: stapes
A bifid uvula results from failure to complete fusion of the _____?
palatine shelves
Abnormal closure of the neural tube can result from a lack out ______ in a mothers diet
folic acid
Melanocytes are derived from cells of what embryonic structure?
neural crest cells
The trilaminar embryonic disc is comprised of which cell layers
Ectoderm, mesoderm, endoderm
“Extrusion of the meningeal layers through the fetal cranium” is an accurate description of which neural tube defect
Meningocele
During what period of development do the germ layers mature and differentiate into specific tissues and organ systems
embryonic
Which cranial nerve supplies innervation to the tissues of the 4th pharyngeal arch
vagus (X)
Which 2 pharyngeal arches contribute to the formation of the hyoid bone
2nd and 3rd arch
List the tissues of neural crest origin
(FATDMC): Dorsal root ganglion, melanocytes, adrenal medulla, facial bones, cartilage, and all tooth and periodontal structures EXCEPT enamel and gingiva
List the tooth/periodontal cells derived from neural crest cells
(DAPPC): dentin, pulp, periodontal ligament, cementum, alveolar bone
In lecture, what was the definition of cyst
cavity lined by cells (either empty or fluid-filled)
The palatine shelves complete fusion during the _____ and ____ week
begins: 8th week of gestation
completes: 12th week
The thyroid gland invaginates at the _______
foramen cecum (brachial arch 1)
Which one of the cranial nerves gives sensory (taste) function in the anterior 2/3 of the tongue
Facial nerve (CN VII) –> via chorda tympani branch
the parathyroid glands are derived from the ectoderm, lining which pharyngeal pouches?
3rd brachial pouch–> inferior parathyroid
4th brachial pouch–> superior parathyroid
If cells that give rise to the thyroid gland fail to migrate from their site of origin, at which of the following anatomical sites would you LEAST likely find the ectopic thyroid?
neck
The embryonic mesoderm cell layer is derived from the _______ layer.
Ectoderm (epiblast)
Implantation of the embryoblast into the uterine wall begins at day ____ following conception, and is completed by day ____ .
Day 4, Day 10
What structures are the precursors of the vertebral column, ribs, associated back muscles
and overlying dermis?
somites (formation induced by notocord)
Cleft lip results when there is a lack of fusion between the ________ and _________ processes
a. Median nasal process
b. Maxillary process
The posterior 1/3 of the tongue is derived from the _______ of the ______ pharyngeal
arch.
a. Hypobranchial eminence
b. 3rd pharyngeal arch
According to the textbook (Berkovitz, et al), the hard palate ossifies intramembranously from ___ centers of ossification.
4 (secondary)
