GD midterm Flashcards
True of false
in a baby eyes and eyes develop 1st.
True
because of there proximity to the nerves
True of false
in a baby eyes and eyes develop 1st.
True
because of there proximity to the nerves pathways nearest to the brain
true of false
in adulthood the head is 1/4 the size of the body
False
1/8
the head is 1/4 the body length at birth
what is the geometric center of the skull
Sella turca
Do bones grow from universal apposition?
False they dont
in order for bone to grow needs fixed non-movable points.
what are the growth curves
Distance (absolute)
by what age is most of the brain/neurons developed
5 years of age
only thing that develops before is lymphoid tissue
tonsils/ lymphoid organs shrink after 12 yrs of age( max lymphoid maturity)
true
True or false
when is the accelarated rate of birth
Conception to 3 months
true or false
women experience circumpubertal growth spurt 1st
True
growth increments
the areas closer to the brain grows faster
mandible 3 catches up to maxilla 2 by ages 5-10
cleft palate only is more common in
Women
Cleft lips only is more common in
Men
also cleft lip&palate combination
at birth the head is about ____ the length of the whole body
1/4
geometric center of skull structures is
Sella turcia
differention
the modification of tissue or function during the course of development
Maturation
the ripening of already existing tissues organs of systems
Differential Growth
growth characterized by varying rates of change
Interstitial growth
growth with the tissue
Accretionary
increase in intercellular substance
multiplicative
increase in number of cells
Dimensional
increase in size of cells
growth of the skull and spinal cord are related to what growth curve
neural
what is the most accurate way to assess a patients age is
skeletal evaluation
when does the face develop
7 weeks post conception a recognizable face
the least cleating possible is
bifid uvula
growth center is
represented by a suture
compensatory to external forces
post natal facial growth only occurs in
Surfaces Sutures, synchondroses condyles
what is the major mechanism of calvaria growth
Appositional growth at cutaneous & meningeal surface
cranial base and adjacent fosse growth is characterized by
Cortical drift and growth at the syndrondroses depending on age of subject
synostosis
early closure of cranial suture
the sphenoid-occipital synchondrosis grows
toward both occipital and sphenoid bone
the velocity cure is also called
incremental curve
sphenoid ethmoidal synchondrosis cease to grow at
7 years of age
which bones of the brain case or only of membranous origin
Frontal, Pariental
which bone is endochondral only
Ethmoid Bone
which bones are mixed in origin
temporal , occipital, splendid
when does heart start beating
week 4
when do the 5 primodia of face develop
5 weeks pc
what are the 5 primordial of the face
eyes nasal pit maxillary process mandible arch oral opening
when is facial development complete
7 wks pc
why is the condyle not a growth center
2ndary cartilage appositional growth not interstitial lacks structural organization cartilage implants dont grow different effect on chem and hormonal agents
bone spatial change is by 2 general processes
Cortical drift
Displacement
Hemifacial Microsomia
No condylar growth on L side
most common distribution of Cleft lip/ palate
cleft lip and palate
Both the maxilla and mandible grow downward and forward
False mandible does grow outward and forward
growth of mandible is
up and back
mandibular displacement
down and forward
what day does blastocyst form
8th day
when does neural tube begin closing
21 day starts in middle
neural crest ectoderm
responsible for carniofacial muscles and bone
When does the cranifacial skeleton change shape
10wk it is ovoid shaped then changes squarish on week 40
percent completion of facial
dimensions at birth
Depth: 30-45%
Height: 40-45%
widthe: 55-60%
statue is divided into quarters
true
somatotypes
Ectomorph-skinny like spider legs ECto
Mesomorph- Meso- mid sized
Endomorph-(endo always means body this is FAT)
Ectomorph
11/2-11/2 -7
skinny tall lanky
Mesomorph
11/2- 7 - 11/2
medium sized ideal size
Endomorph
7-1-11/2
Average individual
is a average balance between the 3 components
4-3.5-4
C/L & palate are most common in what ethnicity
Asians followed by caucasians
It is the 2nd most common birth defect
what direction are most unilateral complete clefts
Left side of mouth
Cleft lip and palate are least likely seen in what ethnicity
black
what week is embryonic disk formed
2 week
also ectoderm
what is important about the 3rd week of development
Gastrulation & production of mesoderm
formation of notochord or head process
Hensens node
Primitive streak
regions where mesoderm is not interposed between ectoderm and entoderm
become phargeal and cloacal membranes
principal derivative of ectoderm is
nervous tissue / neural ectoderm
percent distribution if C/L P types
L-25%
P=30%-chick mostly
L&P-45%
obturator
appliance used to treat cleft of hard and soft palate
direction of condylar growth
Horizontal V growth
condyles spread
Thumb sucking habit must have what to cause a problem
Frequency
intensity
duration
tongue thrusting habit may cause
Open bite
aglossia
congenital defect resulting in partial development or complete absence of tongue
hemifacial microsomia
is a condition in which the lower side of half one side of the face. is underdeveloped and does not grow normally,,,
always include maldevelopment of ear and the mandible
the distance btw sella trice and nation is
anterior cranial base
ossification centers in new born
lack of any secondary centers
absence of any centers on wrist
3 types of interstitial growth
cell division
cell enlargement
Matrix elaboration
