Lecture: Devlopment Flashcards
At what age does the brain begin to shrink?
20
What is the youngest age a baby can survive outside the womb?
25 weeks
True or False?
By the time you are born, your brain is similar to adult state
True
Do men or women tend to have larger brains?
Men
What are the three parts of the brain during development?
Forebrain
Midbrain
Hindbrain
What developmental part of the brain becomes the largest?
Forebrain
What part of the brain grows the most during development?
Forebrain
What is the forebrain made up of?
Two cerebral hemispheres/Cortex
What is another term for the outer cerebral hemisphere?
Cortex
How many cerebral hemispheres are there?
Two
What are the ridges and grooves on the brain called?
Ridges: gyrus
Grooves: Sulcus
Why does the brain have wrinkles?
It decreases the surface area, allowing it to fit into the skull
True or False?
The developmental process creates both hemisphere’s simultaneously
False, makes one at a time
What are the six stages of CNS development?
Neurogenesis
Migration
Differentiation
Synaptogenesis
Neuronal cell death
Synaptic refinement
What layers does the CNS begin with
Ectoderm
Mesoderm
Endoderm
Which initial layer of the CNS develops into the brain?
Ectoderm
True or false?
Doctors can make brain diagnosis by looking at a fetus’ skin (if genetic)
True
What happens after the CNS begins as a plate with three layers?
It rolls into a tube
_____ becomes skin and the _____ _____ becomes central nervous system.
Ectoderm
Neural Plate
What is stage 1 of CNS development
Neurogenesis
Neurogenesis in simple terms
Mitosis produces neurons and glial cells along the ventricular border
What is the central canal filled with during neurogenesis?
CSF
What is a possible failure of neurogenesis?
Failure of mitosis produces microcephaly
Microcephaly
Not enough cells are made during neurogenesis