Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
|
Where are somites derived and what do they turn into?
|
Paraxial mesoderm and turn into sclerotome
|
|
|
What forms the base of the skull?
|
Sclerotome
|
|
|
Where does the neural crest in the head derive and what does it turn into?
|
Derived from neuroectoderm and turns into mesenchyme in pharyngeal arches
|
|
|
What forms the bones of the face and skull?
|
Mesenchyme in pharyngeal arches (neuroectoderm)
|
|
|
develops around the cranial end of neural tube and forms the brain case (cranial vault + base of skull).
|
Neurocranium
|
|
|
develops around the cranial end of gut tube and forms the bones of face, middle ear and hyoid.
|
Viscerocranium
|
|
|
Mesenchyme from somites and neural crest
|
Neurocranium
|
|
|
Mesenchyme from neural crest that migrates through the pharyngeal arches to form the bones of the face, hyoid & middle ear bones.
|
Viscerocranium
|
|
|
Cartilagenous portion of neurocranium
|
Base of skull, ethmoid
sphenoid occipital, base temporal, petrous temporal, mastoid |
|
|
Membranous portion of neruocranium
|
Flat bones of vault (Parietal, Ocipital squamous, Frontal)
|
|
|
What type of ossification does the carilaginous portions (base of skull) of the neurocranium undergo?
|
Enochondral
|
|
|
What type of ossification does the membranous portion (cranial vault) of the neurocranium undergo?
|
Intramembranous
|
|
|
What range does the anterior fontanelle close?
|
2-8
|
|
|
What range does the posterior fontanelle close?
|
first few postnatal months
|
|
|
Small head
|
Microcephaly
|
|
|
Small brain
|
MicroENcephaly
|
|
|
defects in the skull through which the meninges &/or brain herniate.
|
Cranioschisis
|
|
|
Apert's syndrome is associated with what?
|
Craniosynostosis
|
|
|
meninges only
|
Meningocele
|
|
|
meninges plus brain
|
Meningoencephalocele:
|
|
|
meninges, brain & ventricle
|
Meningohydroencephalocele:
|
|
|
no skull
|
Acrania
|
|
|
no brain
|
Anencephaly
|
|
|
Often there is some poorly formed brain stem tissue present (Partial Brain)
|
Meroanencephaly
|
|
|
Enlarged ventricular space due to too much CSF. The head becomes large, if this occurs prior to fusion of the sutures.
|
Hydrocephaly
|
