1.1 Development and Vasculature Flashcards
Recall the 3 germ layers formed during embryonic development?
- Ectoderm
- Mesoderm
- Endoderm
Which of the germ layer (s) contribute to the nervous system development?
Ectoderm
What does the skin (epidermis) and the nervous system have in common?
They have the same precursor cells that the ectoderm uses to form part of the nervous system
Where do the motor (efferent) develop?
from basal lamina of neural tube
Where do the association (interneurons) develop?
develop from alar lamina of neural tube
Where do sensory (afferent) develop?
partly develope from neural crest in dorsal apesct
Cranial development is affected ny proximity of:
- Somites (skeletal elements, muscles, dermis)
- Neural crest-derived structures
- ectodermal plascodes
- dermal bone and snout structure
Examples of neural crest-derived structures>
teeth, facial dermis, Schwann cells,meninges sensory ganglia, autonomic ganglia
The overall most cranial part of brain, thickening occurs here?
Cephalic
forebrain =
prosencephalon
midbrain =
mesencephalon
hindbrain =
rhombencephalon
What is contained in the central cavity?
cerebrospinal fluid
What does the prosencepahlon curve ventrally in this picture?
There is a ventral curve due to limited space
What are the 2 parts of the forebrain?
- diencephalon
- telencephalon
where does the diencephalon expand?
ventrally and laterally
where does the telencephalon expand?
dorsally and laterally
midbrain =
mesencephalon
Pons =
metencephalon
medulla =
myelencephalon
The ____ expands and eventually comes to dominate the brain -cerebral cortex?
the telencephalon
What are the 3 pillars / fibers that connect the rest of the brain to the cerebellum?
Mesencephalon (midbrain)
Metencephalon (Pons)
Myelencephalon (Medulla)
What structures are formed from the hindbrain?
medulla oblongata
pons
cerebellum
What part of the brain does not have much developmental change?
midbrain
