Prenatal/Neonatal Flashcards
Germinal period (time)
fertilization - 2wks
Embryonic period (time)
3-8wks
Fetal period (time)
9wk - birth
Aberrations during the embryonic period result in ____
malformations
Aberrations during the fetal period result in ____
deformations
What happens during the embryonic period?
Differentiation of organ systems.
Blastula becomes Gastrula.
Endoderm of the gastrula - what organ systems?
Digestive
Respiratory
Mesoderm of the gastrula - what organ systems?
Circulatory Muscle Bone Excretory Reproductive
Ectoderm of the gastrula - what organ systems?
Nervous
Sensory
Skin
Order of sensory system development (first to last)
Tactile Vestibular Olfactory Auditory Vision
Limb buds appear __ weeks post-conception
4 weeks
Primary ossification centers
diaphysis of long bones
Secondary ossification centers
epiphysis
Bone formation completes by around age __
20years
Joint formation completes by around age __
early fetal period
Active movement of skeletal muscle begins at ___ weeks of gestation
8-12 weeks
Muscle fiber proportion at full-term
Type 1 = Type 2
Functions of early fetal movements
Prevent stasis/adhesions to uterine wall (or btwn parts of fetus).
Position fetus in vertex position to prep for birth.
Assist in development of bone, joint, & muscle fiber differentiation.
Recoil testing
To observe flexion tone.
Quick stretch from ankle, then it recoils back into flex.
Neural tube forms at __ weeks of gestation
3 weeks
Cranial 2/3 of neural tube is the ____
brain
Caudal 1/3 of neural tube is the ____
spinal cord
Critical development of the nervous system is complete at ___ weeks of gestation
8 weeks
Impacts of hospitalization
- Gravity
- Prolonged asymmetry
- Lack of womb resistance
- Early & excessive sensory exposure
