Neuro embryology Flashcards
What are the three primary vesicles?
Prosencephalon (Forebrain)
Mesencephalon (Midbrain)
Rhombencephalon (Hindbrain)
What are the 5 secondary vesicles?
Telencephalon Diencephalon Mesencephalon Metencephalon Myelencephalon
At what week do primary vesicles begin to form?
3-4 weeks
At what week do secondary vesicles form?
5 weeks
What secondary vesicles forms from the prosencephalon?
Telencephalon
Diencephalon
What secondary vesicles form from the rhombencephalon?
Metencephalon
Myelencephalon
What neural derivatives form from the telencephalon?
Cerebral hemispheres and globus pallidus
What cavity derivatives form from the telencephalon?
Lateral ventricles
What neural derivatives form from the diencephalon?
Thalamus, hypothalamus and epithalamus
What cavity derivatives form from the diencephalon?
Third ventricle
What neural derivatives form from the mesencephalon?
Midbrain
What cavity derivatives form from the mesencephalon?
Cerebral aqueduct
What neural derivatives form from the metencephalon?
Pons and cerebellum
What cavity derivatives form from the metencephalon?
Upper part of 4th ventricle
What neural derivatives form from the myelencephalon?
Medulla
What cavity derivates form from the myelencephalon?
Lower part of 4th ventricle/ central canal
Out of which layer does the notochord form?
Mesoderm
What does the notochord secrete and why?
Growth factors which stimulate the differentiation of the overlying ectoderm into neuroectoderm forming the neural plate
What is the neural crest?
Some cells within the neural folds that migrate to form the neural crest
What cells form from the neural crest?
Melanocytes, craniofacial cartilage and bone, smooth muscle, peripheral and enteric neurons and glia
What is neurulation?
The formation of the neural tube
When does neuralation occur?
The 4th week of development
