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Embryology
Cleft Palate Exam 1
| Term | Definition |
|---|---|
| Embryo | First stage of development (fertilization to 8 wks) |
| Fetus | 8 wks to brith, organs start to function and genitalia visible on ultrasound |
| When does neural tube develop? | 18 to 20 days |
| What does the neural tube become? | Brain and spinal cord |
| What is the earliest developing embryonic structure? | Spinal cord |
| What should mothers do at 8 weeks? | Stop retinol, and start taking folic acid and prenatal |
| What is on the side of the neural tube? | Buds |
| What do buds become? | Organs |
| When do the buds form? | 4 weeks |
| 4-5 weeks | Embryo goes from extended to flexion stage, more buds form |
| Buds that form at 4-5 weeks are representative of the ________ | Forebrain |
| 32 days | Buds on either side come together |
| 6 weeks fetus is _______ | 8 mm |
| What happens at around 8 weeks? | Ears develop |
| Where do ears develop? | Lower than they are at brith |
| What are low ears a sign of at or after birth? | Many developmental/genetic syndromes |
| Growth directions of face | Anteriorly, medially, inferiorly |
| Premodia | Early, primitive structure |
| Frontal Prominence turns into | Foreheard |
| Nasal Palacode and nasal pit become | Nostril |
| Nasolateral process becomes | alar rim |
| Maxillary process | Maxilla |
| Mandibular arch | Mandible |
| Hyoid arch | Hyoid bone |
| Structures formed from frontal process | Nasal pits, upper lip |
| When nasal pits fusion in median and lateral regions of frontal process | it becomes nostrils |
| Upper lip is formed from fusion of | maxillary and median frontal processes and merging of median nasal |
| What happens to maxillary process in 7th week? | Mouth opening is smaller and checks are rounded bulges |
| What happens on mandibular process in 7th week? | Ear appear lateral and posteriorly as low sets |
| What happens on hyoid arch in 7th week? | Almost complete ring of tissue around EAM |
| Fusion | 2 processes uniting, 2 structures into 1 |
| Merging | Laters below push up epithelium and fill in gaps (not 2 structures coming together) |
| Which is more susceptible to breaking apart? (merging or fusion) | Fusion |
| What happens to hard palate in 7th week? | Premaxillae from and palatine processes are in a vertical orientation |
| What happens to oral and nasal cavities in 7th week? | They are not separated and tongue is in both |
| What makes up hard palate? | Premaxillae and 2 palatine processes |
| What happens in the 9th week? | Palate growth spurt |
| What does oral cavity do during palate growth spurt? | Enlarges |
| Tongue in 9th week | Drops down |
| Hard palate in 9th week | Palatine processes can go horizontally now and head towards midline |
| What fuses in 9th week? | Palatine provess, starts anteriorly to posteriorly, |
| What is the last thing to fuse on midline suture hard palate? | Uvula |
| What happens if uvula doesn't completely fuse? | Bifid palate |
| Being to detect cleft lip at | 13 weeks |
| What can't be diagnosed on ultrasound? | Cleft palate, you have to be able to look inside oral cavity |
| Why could someone have a normal palate but bifid uvula? | It is the last structure to fuse |
Created by:
morganmc3
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