Clinical And Embryology Notes Flashcards
Appears in the floor of the pharynx behin the tuberculum impar. It extends forward on each side of the tuberculum impar and becomes V-shaped
Copula
A tooth that is in close relation to the lingual nerve?
Lower third molar tooth
Separates the ectoderm and endoderm in the 3rd week of development
Buccopharyngeal membrane
The oral cavity is formed from two sources: a depression from the exterior, the _____, which is lined with ______, and a part immediately posterior to this, derived from the cephalic end of the foregut and lined with ______
Stomodeum
Ectoderm
Entoderm
Ectodermal structures of the mouth
Epithelium of the hard palate, sides of the mouth, lips, enamel of the teeth
Parotid gland
Entodermal region of the mouth
Epithelium of the tongue, floor of the mouth, palatoglossal and palatopharyngeal folds, most of the soft palate
The secretory and duct epithelia of the sublingual and submandibular salivary glands
Basic test in Hypoglossal nerve testing
Asking the patient to protrude their tongue
About 4th week, a median swelling ___ appears in the entodermal ventral wall or floor of the pharynx
Tuberculum impar
A derivative from the anterior end of each first pharyngeal arch that appears on each side of the tuberculum impar.
Lateral lingual swelling
The lingual swellings thus form the ___ Because they are derived from the first pharyngeal arches
Anterior two thirds of the tongue
The anterior two thirds of the tongue is separated from the posterior third by a groove, the ___ which represents the interval between the lingual swellings of the first pharyngeal arches and the anterior ends of the third pharyngeal arches.
Sulcus terminalis
Innervation of circumvallate papillae
Glossopharyngeal nerve
It is presumed that during development, the mucous membrane of the root of the tongue becomes pulled _____ slightly, so that fibers of CN IX cross the sulcus terminalis to supply these taste buds.
Anteriorly
Give rise to the muscles of the tongue
Occipital myotomes
These myotomes first are closely related to the developing hindbrain and later migrate ___ and ____around the pharynx and enter the tongue. The migrating myotomes carry with them their innervation _____, and this explains the long curving course taken by the nerve as it passes _____ and _____ in the ___ triangle of the neck.
Inferiorly and anteriorly
Hypoglossal nerve
Downward and forward
Carotid
The medial nasal process forms the ___, which carries the four incisor teeth
Primary palate
Posterior to the primary palate, the maxillary process on each side sends medially a horizontal plate called the palatal process; these plates fuse to form the _____ and also unite with the primary palate and the developing nasal septum.
Secondary palate
The primary and secondary palates later will form the
_____
Last structure to form in the palatal development
Uvula
Two folds grow posteriorly from the posterior edge of the palatal processes to create the ?
Soft palate
The union of the two folds of the soft palate occurs during the ___
8th week
The two parts of the uvula fuse in the midline during the __ week?
11th
The interval between the primary palate and secondary palate is represented in the midline by the ___
Incisive foramen
First, second, third and fourth degree and a rare condition of fusion failure of the facial primordia
Cleft uvula
Ununited palatal processes
Unilateral cleft lip
Bilateral cleft lip
Bilateral cleft lip and jaw
