facial bones

Question 1

period of ovum

Answer 1

extends 2 weeks after fertilization. Ovum attaches to uterine wall

Question 2

Period of embryo

Answer 2

from 14th day to 56th day of intrauterine life. Major facial development occurs

Question 3

period of fetus

Answer 3

from 56th day to birth. more excessive facial growth.

Question 4

from which mass does the cytodifferentiation occur into ecto, meso, and endoderm?

Answer 4

inner cellular mass

Question 5

describe the neurocranium

Answer 5

part of skull that holds the brain

Question 6

descrbe the viscerocranium

Answer 6

basically your face

Question 7

endochondral development of the neruocranium occurs in what bones?

Answer 7

sphenoid, temporal, occipital, ethmoid

Question 8

intramembranous growth of neurocranium occurs in what bones?

Answer 8

parietal, occipital, temporal

Question 9

what bones does the viscerocranium include?

Answer 9

frontonasal, median nasal, lateral nasal, nasolacrimal, maxillary, mandibular

Question 10

hyoid bone is derived from which pharyngeal arches?

Answer 10

2 ,3

Question 11

laryngeal cartilages are derived from which pharyngeal arches?

Answer 11

4,6

Question 12

Which pharyngeal arch does the anterior 2/3 of tongue arise from?

Answer 12

1st. it arises from the median and lateral tongue buds of the arch

Question 13

sensory inntervation of anterior 2/3 of tongue is via..

Answer 13

lingual branch of trigeminal

Question 14

taste of anterior 2/3 is via..

Answer 14

chorda tympani of facial nerve

Question 15

motor innervation of anterior 2/3 of tongue is via….

Answer 15

hypoglossal n.

Question 16

which arch/arches does the posterior 1/3 of tongue come from?

Answer 16

3rd, 4th

Question 17

taste innervation of posterior 1/3 is via..

Answer 17

glossopharyngeal

Question 18

motor of tongue is via

Answer 18

hypoglossal

Question 19

whats the purpose of fontanelles and sutures?

Answer 19

bones overlap during birth to assist in the birthing process. They close at various times postnatally.

Question 20

what makes the posterior fontanelle?

Answer 20

its a confluence of the lambdoid and sagittal sutures

Question 21

what makes the anterior fontanelle?

Answer 21

confluence of sagittal, coronal and frontal sutures

Question 22

who is Dr. Rickets ?

Answer 22

hes a doctor that emphasized the relationship of the face and mandible to the cranium

Question 23

Rickets cephalometric analysis analizes what?

Answer 23

1. Pts craniofacial morphology to determine the facial type

2. position and intterrelations of different components of the dento-maxillo-facial strucutres in several fields.

Question 24

endochondral bone growth

Answer 24

involves cartilage plates with epiphyses

Question 25

intramembranous bone growth

Answer 25

starts with mesenchyme which turns to osteogenic cells which turns to osteoblasts which become surrounded by the newly formed bone and become osteocytes

Question 26

osteoblasts role

Answer 26

build bone which is called apposition

Question 27

osteoclasts role

Answer 27

resorb bone

Question 28

what kind of tissue is in sutures?

Answer 28

dense fibrous tissue

Question 29

whats a fibrous joint called?

Answer 29

synarthrosis, This includes sutures and alveolar joints

Question 30

whats a syncondrosis?

Answer 30

where the connecting medium is hyaline cartilage

Question 31

name some examples of synchondrosis

Answer 31

sterocostal joints, epiphyseal growth plates are temporary synchondrosis

Question 32

where are epiphyseal growth plates found?

Answer 32

between diaphyses and epiphyses of long bones. between occipital and sphenoid. between petrous portion of temporal andjugular process of occipital bone

Question 33

5 postnatal synchodrosis

Answer 33

``` Spheno-frontal Spheno-ethmoidal Spheno-occipital Inter-spenoidal Fronto-ethmoidal ```

Question 34

T/F, sutural syndesmosis grow on one side?

Answer 34

F, both sides of the sutre

Question 35

name the two types of cranial sutures

Answer 35

``` But-end type beveled type ( grows obliquely) ```

Question 36

define displacement

Answer 36

movement of the whole bone as a unit.

Question 37

primary displacement

Answer 37

Bone gets displaced as a result of its own growth, Growth of the maxilla at the tuberosity region results in pushing of the maxilla against the cranial base which results in the displacement of the maxilla in a forward & downward direction.

Question 38

secondary displacement

Answer 38

Bone gets displaced as a result of growth & enlargement of an adjacent bone Growth of the cranial base causes the forward and downward displacement of the maxilla