34 Questions
What is the primary palate?
A part lying anterior to the incisive fossa
What is the structure that gives rise to the formation of maxillary and mandibular processes?
First pharyngeal arch
When does the development of the secondary palate begin?
Early in the 6th week
How many facial primordia appear as prominences around the stomodeum?
5
What is the origin of the lateral palatine process?
The internal aspect of the maxillary processes
What is the structure that sinks below to form nasal pits?
Nasal placodes
What is the direction of growth of the lateral palatine processes in the beginning?
Inferomedially
What is the structure that gives rise to the formation of the nose and nasal cavities?
Nasal placodes
What is the result of the fusion of the lateral palatine processes and the nasal septum?
Formation of the hard palate
What is the structure that develops from the cranial part of the first branchial arch?
Maxillary process
When is the fusion with the nasal septum completed?
By the 12th week
What is the structure that develops from the caudal part of the first branchial arch?
Mandibular process
How many weeks into embryonic development do the nasal placodes form?
4-5 weeks
What forms the posterior part of the secondary palate?
The soft palate
What is the origin of the anterior 2/3 of the tongue?
1st pharyngeal arch
What is the structure that gives rise to the formation of the face?
All of the above
What does the fronto-nasal prominence form?
The forehead and the bridge of the nose
What does the maxillary prominence form?
The upper cheek regions and most of the upper lip
What does the mandibular prominence form?
The chin, lower lip, and lower cheek regions
What do the lateral nasal prominences form?
The alae of the nose
What does the intermaxillary segment give rise to?
The philtrum of lip, premaxillary part of the maxilla, and primary palate
When does palatogenesis begin?
At the end of the 5th week
When does the development of the palate get completed?
At the end of the 12th week
What is the most critical period for the development of the palate?
From the end of the 6th week to the beginning of the 9th week
What is the source of the intrinsic muscles of the tongue?
Occipital myoblasts
Which nerve supplies the posterior 1/3rd of the tongue?
Glossopharyngeal nerve
What is the origin of the posterior 1/3rd of the tongue?
Third arch mesoderm
What is the name of the line that indicates the fusion of the anterior 2/3 and posterior 1/3 of the tongue?
Terminal sulcus
What is the nerve supply of the musculature of the tongue?
Hypoglossal nerve
What is the origin of the most posterior part of the tongue?
Fourth arch mesoderm
What is the result of the fusion of the second arch mesoderm and the first arch mesoderm?
Formation of the anterior 2/3 of the tongue
What is the nerve that supplies the most posterior part of the tongue?
Superior laryngeal nerve
What is the origin of the lingual swellings?
Tuberculum impar and two lingual swellings
What is the nerve that supplies the anterior 2/3 of the tongue?
Lingual branch of the mandibular nerve
This quiz covers the formation of orofacial structures, development of palate, and tongue formation from embryonic stages. It focuses on the 4-5 week embryo development, fronto-nasal process, and pharyngeal structures. Test your knowledge of embryology and facial development!
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