Lecture 10- Development of the Face Flashcards
Name 4 bones that develop from pharyngeal arch 1
Maxilla
Mandible
Incus
Malleus
Name 5 skeletal derivatives of arch 2
Stapes Styloid process Stylohyoid ligament Lesser horn of hyoid Body of hyoid
What type of bone formation do the malleus and incus use?
endochondral ossification
What is the cartilage of pharyngeal arch 1 called?
Meckels Cartilage
What are the 3 parts of the skull during development?
Neurocranium
Viscerocranium
Chondrocranium
What are the five major “processes” involved in facial development?
- Frontonasal processes
- Left & Right Maxillary processes
- Left & Right Mandibular process
- Medial nasal processes (nasal placodes)
- Lateral nasal processes
What is the stomoduem?
mouth
What is the largest of the five major processes of facial development?
Frontonasal prominence
What structure initially separates the nasal pits from the nasal cavity?
choanal membrane
What structures fuse to form the upper lip during development?
medial nasal prominences
maxillary prominances
What two prominences does the nasolacrimal groove develop between?
maxillary prominence and lateral nasal prominence
From what developmental structure does the philtrum develop?
Medial nasal prominence
What structures form from the mandibular prominences?
lower jaw, cheeks and chin
What are the two types of cleft lips and what differentiates the two?
Anterior and posterior
based on whether the cleft is anterior or posterior to the incisive foramen
What is the cause of an anterior cleft lip?
partial or complete lack of fusion of the maxillary prominence with the medial nasal prominence
