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Embryo Head and Neck

QuestionAnswer
Please list the muscles of mastication, and from which pharyngeal arch are they derived? masseter, temporalis, lateral and medial pyterygoids... from the 1st pharyngeal arch
What specific layer of mesoderm differentiates into somites Paraxial Mesoderm
Which nerve innervates the structures derived from the 5th pharyngeal arch [name and number] No 5th arch.
What structure gives rise to the calcitonin secreting cells of the thyroid gland Ultimobrachial Body
Why is removal of lingual thyroid tissue not advised do not want to remove thyroid tissue, and its very vascular.
A patient presents to your office with a suspected enlarging lingual thyroid. What 3 symptoms might they be complaining of Dysphagia, dyspnea, dysphonia
Define Dysphagia, dyspnea, dysphonia Dysphagia (difficulty swallowing), dyspnea (difficulty breathing), dysphonia (difficulty speaking)
What 2 structures are derived from the 3rd pharyngeal pouch inferior parathyroid and thymus
Name one feature which would help you distinguish between a branchial cleft cyst and a thyroglossal duct cyst in clinical exam LOCATION!! thyroglossal will be on midline, branchial cleft cyst will be lateral
This birth defect results in a lack of development of one side of the facial structures Hemifacial microsomia, goldenhar syndrome, oculoauriculovertebral syndrome
Which nerve innervates the structure derived from the 6th pharyngeal arch [name and number] CN X, Vagus
The embryonic mesenchyme of each pharyngeal arch has two major cellular contributors _____ and ______ Mesoderm [lateral and paraxial] and neural crest cells
Name 2 categories of teratogens Drugs, pollutants, infectious diseases, certain maternal diseases (ex. Uncontrolled diabetes) genetic factors
Which nerve innervates the structures derived from the 3rd pharyngeal arch [name and number] CN IX, glossopharyngeal
From which embryonic layer does the notochord develop Mesoderm
____ are thickenings of the ectoderm which, along with the neural crest cells, form cranial nerve sensory ganglia Ectodermal Placodes
The cavity of the middle ear and the eustachian tube are derivatives of what pharyngeal pouch 1st Pharyngeal Pouch
Treatment for ankyloglossia in an infant is predominately based on feeding difficulty
T/F: A branchial cleft cyst is a developmental cyst and therefore is always clinically evident at the time of birth FALSE
Which nerve innervates the structures derived from the 2nd pharyngeal arch [please provide name and number] CN 7, Facial
What embryonic tissue lines the pharyngeal pouches Endoderm
What are polar bodies Small haploid cells that are produced during oogenesis that do not develop into ova
Which embryonic cartilage act as a scaffolding for the formation of the mandible Meckel Cartilage
From which pharyngeal cleft do most branchial cleft cysts arise 2nd Cleft
What is the term for the attachment between the tongue and floor of the mouth Frenulum
___ is the process by which germ cells are derived Gametogenesis
The muscles of facial expression arise from which component of the pharyngeal apparatus 2nd Pharyngeal Arch
Which nerves innervates the structures derived from the 1st pharyngeal arch [name and number] CN 5, Trigeminal
How many pharyngeal pouches are there 4
90% of lingual thyroids are found where? Between the epiglottis and the foramen cecum
Failure of this embryonic structure to involuate during a development may result in a cystic midline neck mass thyroglossal duct
What cranial nerve(s) innervate the anterior ⅔ of the tongue and the posterior ⅓ of the tongue (must include name and number) anterior 2/3: CN 5 (trigeminal) Posterior 1/3: CN IX (glossopharyngeal)
Created by: toothfairymeg
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