Development & Anatomy Of The CNS Flashcards
Phases of prenatal ontogeny:
Zygote - Blastocyst - (Gastrula) - Embryo (4-8w) - Fetus (8w-8mo)
Secondary brain vesicle - Telencephalon - contains…
Olfactory bulbs Limbic system Neocortex Basal Ganglia Septum
Secondary brain vesicle - Diencephalon - contains…
Thalamus
Hypothalamus
Pituitary gland
Pineal gland
Secondary brain vesicle - Mesencephalon - contains…
Cerebral peduncle
Tectum
Tegmentum
Secondary brain vesicle - Rhombencephalon - contains…
Pons
Cerebellum
Medulla oblongata
The process through which the nervous system develops from the ectoderm is…
…neurulation
The gastrula contains three layers of cells:
- endoderm
- mesoderm
- ectoderm
Two cellular mechanisms during prenatal ontogenesis:
- cell differentiation
- cell migration
The two principles of the phylogenesis of the nervous system:
- principle of representation (neurones added in parallel to the existing ones - extra RAM)
- principle of intelligence (increasing complexity of neuronal networks, novel properties, feed-forward and feedback connections)
The most elementary neuron network is a…
…reflex arc
In the development of the nervous system from the ectoderm through neurulation, the ectoderm thickens and forms a…(1)…which later sinks into a groove and forms the…(2)…
(1) - neural plate
(2) - neural tube
The triggering mechanism and guidance for cell differentiation and migration is provided by this protein:
…the sonic hedgehog protein
