Development of Head/Neck III Flashcards
The outside of the pharyngeal arch is covered with _____.
Ectoderm
The inside of the pharyngeal arch is covered with _____.
Endoderm
FGF-8 induces pharyngeal arch formation and is induced by _____.
Tbx-1
What muscles arise from pharyngeal arch III?
Stylopharyngeus
What skeletal structures arise from pharyngeal arch III?
Greater part of hyoid, part of body of hyoid
The mandibular arch is associated with the _____ nerve.
Trigeminal
V3 mostly innervates _____, while the rest is sensory.
Muscles of mastication
Meckel’s cartilage arises from pharyngeal arch _____.
1
The hyoid arch is associated with the _____ nerve.
Facial
Reichert’s cartilage & muscles of facial expression arise from pharyngeal arch _____.
2
Reichert’s cartilage & muscles of facial expression arise from pharyngeal arch _____.
2
The 3rd & 4th pharyngeal arches are associated with the _____ & _____ nerves.
Glossopharyngeal & vagus
The tympanic cavity of the middle ear & the auditory tube are derivatives of the _____ pharyngeal pouch.
First
The fossa for palatine tonsils are derivatives of the _____ pharyngeal pouch.
Second
The inferior parathyroids & thymus are derivatives of the _____ pharyngeal pouch.
Third
The inferior parathyroids arise due to high concentrations of _____.
Shh
The thymus arises due to high concentrations of _____.
BMP-4
The superior parathyroids & postbranchial body are derivatives of the _____ pharyngeal pouch.
Fourth
The superior parathyroids & postbranchial body are derivatives of the _____ pharyngeal pouch.
Fourth
What is derived from between the first and second pairs of pharyngeal arches?
Thyroid gland
The thyroid diverticulum persists as a small pit at the base of the tongue called the _____.
Foramen cecum
What is stimulated by BMP-4 & FGF-8 from the floor of the diencephalon?
Rathke’s pouch
The inner layer of the cup (of Rathke’s pouch) forms the _____.
Pars intermedia
The outer layer of the cup (of Rathke’s pouch) forms the _____.
Anterior pituitary
The foramen cecum is located between the _____ & the _____.
Tuberculum impar.
Copula
What are the primordia of the anterior, middle, and posterior parts of the tongue?
Anterior=Lateral lingual swellings
Middle=Tuberculum impar
Posterior=Copula
What is the term for a small mandible?
Micrognathia
What is the term for failure of the lower jaw to form?
Agnathia
What is an autosomal dominant condition caused by TCOF1 gene that reduces the population of neural crest cells in the first pharyngeal arch.
Treacher Collins syndrome
What is the term for an opening closed at one end and open to the pharynx or outside at the other end?
Sinus
What is the term for a tube that is open at both ends?
Fistula
What is an enclosed cavity that was probably part of a pharyngeal pouch, groove, or cervical sinus?
Cyst
What is an enclosed cavity that was probably part of a pharyngeal pouch, groove, or cervical sinus?
Cyst
What condition is a malformation of the tongue characterized by subnormal regression of the frenulum?
Ankyloglossia
What is caused by failure of differentiation of the thymus and parathyroid glands and results in cranial neural crest deficiency?
DiGeorge’s syndrome
