Devo Review Block B Flashcards
microstomia-
no lower jaw or tongue, tiny mouth. caused by excessive merging of mesenchyme in maxillary mandibular prominences
prosencephalon develops into ______ and _____
telencephalon and diencephalon
rhombencephalon develops into _____ and ______
metencephalon and myelencephalon
telencephalon derivative
cerebral hemispheres
diencephalon derivative
thalamus and hypothalamus
mesencephalon derivative
midbrain
metencephalon derivative
pons and cerebellum
myelencephalon derivative
medulla
cervical flexure-
level where medulla is continuous with the spinal cord
midbrain flexure-
between mesencephalon and prosencephalon
pontine flexure-
divides rhombencephalon into myelencephalon and metencephalon
what flexure is responsible for opening up ventricular system?
pontine flexure
what keeps the motor and sensory plates separate?
sulcus limitans
smooth brain-
lissencephalic
anencephaly results when
anterior neuropore fails to close
_______ is where anterior neuropore was located developmentally
lamina terminalis
microcephaly-
small cranial vault
obstructive hydrocephalus in infants can be caused by
congenital aqueductal stenosis
skull base is formed via
endochondral bone formation
neurocranium is formed via
intramembranous bone formation
what fontanelles exist
anterior, posterior, mastoid, and sphenoid
what suture may persist in front of skull
metopic suture
premature fusion of sutures-
craniosynostosis
syndromes associated with craniosynostosis
saethre-chotzen, crouzon, apert, pfeiffer
fused saggital suture will result in
scaphocephaly
fused metopic suture will result in
trigonocephaly
unilateral fused coronal suture will result in
plagiocephaly
bicoronal suture fusion will result in
turricephaly
lamboid suture fusion will result in
plagiocephaly
structures formed from 1st arch cartilage
malleus, incus, anterior ligament of malleus, and sphenomandibular ligament
structures formed from 2nd arch cartilage
stapes, styloid process, stylohyoid ligament, lesser cornu/superior part of hyoid