embryo

Question 1

skel system derived from

Answer 1

neural crest - bones of face

paraxial meso - somitomeres (head region) + somites (occip region) further differentiates at 4th week

Question 2

somites form what at 4th wk

Answer 2

scerotome
dermomyotome

> cranial vault and base of skull

Question 3

intramem ossif def

Answer 3

mesenchyme diff directly into bone eg flat bones of skull

Question 4

endochon ossif defn

Answer 4

mesenchyme give rise to hyaline cart model which ossifies

Question 5

neurocranium

Answer 5

protective case around brain

Question 6

viscerocranium

Answer 6

skeleton of face
der from ph arch 1 and 2

Question 7

neurocran divisions

Answer 7

membr part- flat bones surrounding brain as a vault

cart part- forms bones @ base of skull

Question 8

bones der from neu crest

Answer 8

facial bones + frontal + sphen+ temp+ hyoid + laryngeals

Question 9

bones der from paraxial meso

Answer 9

parietal + pet temp + occip

Question 10

ala orbitalis

Answer 10

les wing of sph

Question 11

ala temporalis

Answer 11

gr wing of sph

Question 12

mesenchymal condensations of skull base

Answer 12

ala orbitalis - ls wing of sph
ala temporalis - gr wing of sph
periotic capsule - petrus and mastoid parts of temp bone

Question 13

1st ph arch divisions and der

Answer 13

dorsal max process - maxilla+zyg bone+parts of temp bone

ventral mandib process -
contains meckels cart > mandible
>dissappears except in presence of sphenomandib lig

Question 14

2nd ph arch div and der

Answer 14

incus stapes malleus

Question 15

scaphocephaly

Answer 15

early closure of sag sut

Question 16

acrocephaly

Answer 16

closure of coronal sut

Question 17

plagioceph

Answer 17

closure of coronal and lambdoid on one side

Question 18

bones of calvaria (roof)

Answer 18

temp, par, front, sph, occip

Question 19

bones of cranium

Answer 19

sph, temp, occip

Question 20

bones of face

Answer 20

nasal, lacrimal palatine, zyg, max, inf nasal chon, vomer

Question 21

frontal crest of calvaria

Answer 21

serves as attachment for falx cerebri

Question 22

granulae foveolae of calvaria

Answer 22

mark location of arachnoid granulations
smaller grooves of meningeal vessels

Question 23

bregma

Answer 23

ant front

Question 24

lambda

Answer 24

post front

Question 25

incomplete supraorbital foramen

Answer 25

supraorbital notch

Question 26

passes through stylomast for

Answer 26

cn vii
stylomast a

Question 27

antlo-occip joint

Answer 27

occip condyles art with atlas

Question 28

occip landmarks

Answer 28

ext occip protuberance
sup nuchal lines
inion
inf nuchal lines
ext occip crest

Question 29

sella turcica div

Answer 29

tuberculum sellae
hypophyseal fossa
dorsum sellae

Question 30

sup orbit for

Answer 30

sup ob nerve + vessels