Term
| during which period of development do the face and structures of the oral cavity begin to develop? What is the date range for this period? |
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Definition
| embryonic period (2-8 weeks) |
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Term
| In the 3rd week of development, what adult structures does the stomodeum develop between? |
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Definition
| midline between brain and heart |
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Term
| What are the 5 facial processes that form during the 4th week around the primitive mouth? |
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Definition
2 mandibular processes
2 maxillary processes
1 frontonasal process |
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Term
| Where is the frontal process located in relation to the future stomodeum? |
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Definition
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Term
| Which 4 processes make up the 1st branchial arch? |
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Definition
| 2 maxillary and 2 mandibular processes |
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Term
| Which structures will form from the 2 mandibular processes of the 1st branchial arch? (7) |
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Definition
lower part of cheek
lower lip
lower jaw
part of tongue
mastication muscles
teeth
middle ear bones |
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Term
| Which structures will form from the 2 maxillary processes of the 1st branchial arch? (3) |
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Definition
upper part of the cheeks
upper lip
most of the palate |
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Term
| Which structures will form from the frontonasal process? |
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Definition
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Term
| How many additional branchial arches form beneath the 1st branchial arch? What weeks does this occur? |
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Definition
4 other branches
weeks 4-7 |
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Term
| What is another name for the 1st branchial arch? |
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Definition
|
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Term
| What is the term for bars of tissue that bend around the sides of the pharynx? |
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Definition
| branchial arches (1st mandibular arch) |
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Term
| what is the term for grooves within the pharynx that separate arches? |
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Definition
| branchial grooves (look like gills) |
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Term
| Where is the 1st branchial arch derived from? |
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Definition
| mesenchyme from neural crest cells |
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Term
| What is the first part of the face to form? |
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Definition
|
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Term
| what is another name for the 2nd branchial arch? |
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Definition
|
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Term
| What germ layer covers the outer surfaces or arches and inner surface of the 1st branchial arch? |
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Definition
| ectoderm (oral epithelial lining) |
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Term
| What germ later covers the outer surface of branchial arches 2-5? |
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Definition
| endoderm (GI tract lining) |
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Term
| The mandibular synthesis forms as the result of fusion between which two structures? |
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Definition
| Left and right mandibular processes |
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Term
| If the left and right mandibular processes fail to fuse to form the mandibular arch, which is the resulting developmental disturbance? |
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Definition
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Term
| What is the term for cartilage that forms in the mandibular arch and later becomes the mandible? |
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Definition
|
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Term
| What is the term for formation of bone from cartilage tissue? |
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Definition
| intramembranous ossification |
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Term
| What nerve innervates the mandibular arch? |
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Definition
| trigeminal nerve (V cranial nerve) |
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Term
| Fordyce spots are sebaceous in oral mucosa that become entrapped during fusion of which developmental processes? |
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Definition
| R & L maxillary processes with R & L mandibular processes |
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Term
| cleft LIP may result from the failure of fusion between which processes? |
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Definition
| median nasal process with globular process |
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Term
| cleft PALATE may result from the failure of fusion between which structures? |
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Definition
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Term
| What germ tissue usually fails to form under the tissues of a cleft lip or palate? |
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Definition
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Term
| Is cleft lip more common in boys or girls? |
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Definition
|
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Term
| Is cleft lip more common bilaterally or unilaterally? Is it usually on the L or R? |
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Definition
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Term
| How is cleft lip corrected and why is it done (clinical considerations)? |
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Definition
| Repaired surgically because it interferes with nursing, speech, and appearance |
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Term
| What range of weeks does the face usually develop? |
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Definition
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Term
| What environmental factors can cause branchial arch defects before the 5th week of development? |
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Definition
irradiation
chemicals
hormones
diet
stress |
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Term
| During which week does the frontal nasal process begin to form into the forehead and nose? |
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Definition
|
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Term
| What are the specialized bilateral ectoderm structures that form on the frontal nasal process called? What week does this occur? |
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Definition
|
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Term
| What do these nasal placodes form? |
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Definition
| nasal pits which become nostrils |
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Term
| What are the processes that form around the nasal placode? |
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Definition
2 lateral nasal processes (bilateral nasal process)
2 medial & nasal processes |
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Term
| What part of the nose is formed by the lateral nasal processes (bilateral nasal process)? |
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Definition
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Term
| What pars of the nose are formed by the medial and nasal processes? (5) |
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Definition
bridge of nose
nostrils
globular process
philtrum of upper lip
primary palate |
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Term
| when does development of the neck begin? |
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Definition
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