Chapter 3 Part 2 Flashcards
Period when neural tube is formed (Neuruation)
Dorsal induction
Ends of neural tube closes by week __
6
What develops out of the neural tube (2)?
Brain and spinal cord
What are 3 possible things that can happen when the neural tubes don’t close?
Encephalocele, anencephaly, spina bifida
When part of the brain protrudes out of the skull
Encephalocele
Brain development ceases at brainstem; child without cerebral hemispheres
Anencephaly
Cyst on back that may or may not involve the spinal cord
Spina bifida
Neurodevelopment period when face and brain develop out of the superior end of the neural tube
Ventral induction
Forebrain
Prosencephalon
Midbrain
Mesencephalon
Hind brain
Rhombencephalon
Cerebral cortex, basal ganglia, olfactory bulbs
Telencephalon
Thalamus, hypothalamus, epithalamus, subthalamus
Diencephalon
Pons, cerebellum
Metencephalon
Medulla
Myelencephalon
Failure of brain cleavage
Holoprosencephaly
No cleavage at all resulting in no distinct cerebral hemispheres; no corpus callosum
Alobar form
Some cleavage and developmental of right and left hemispheres, but incomplete; no corpus callosum
Semilobar form
Least severe; brain looks normal, but abnormal connections between hemispheres
Lobar form
Period of the birth of new neurons; new neurons will be gray and white matter of cerebral hemispheres
Neural proliferation