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
What 2 parts make up the forebrain?
- diencephalon
- telencephalon
What structures are formed in the diencephalon?
epithalamus
thalamus
hypothalamus
What structures are formed in the telencephalon?
cerebral cortex
limbic system
olfactory bulbs
Which nerve has the soma in dorsal root ganglion, axon in the dorsal root
sensory nerve
Which nerve has the soma in the ventral horn, axon in the ventral root
motor nerve
which nerve is lateral?
sensory
Which nerve is medial?
motor
Peduncle:
3 pillars supporting cerebellum, attchment area
What can be seen once the cerebellum is removed?
4th ventricle
Which way does the 4th ventricle expand?
laterally
flocculus and nodule (archi):
balance,
hemisphere (neocerebellum):
skilled movement, feedback to cerebral cortex
**Important in hunting animals
vermis (palaeo):
proprioception, involved in feedback process for maintaining posture
Is Met- rostral or caudal?
rostral
Is Myel- rostral or caudal?
caudal
What nerve does NOT go through the Thalmus?
Olfactory (smell)
Thalmus =
Connection of sensory fibers that are going to cerebral hemisphere through the thalamus for us to make sense of it
ex: vision
planning and anxiety = what lobe
frontal lobe
sensory: cutaneous and taste = what lobe
parietal lobe
hearing, language = what lobe
temporal lobe
visuin = what lobe
occipital lobe
