learning objectives for the nervous system devleopment
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| List the three stages of neural tube formation. | Neural plate, neural groove, neural tube
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| What structure is responsible for the induction of neurulation? | The notochord
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| List the derivatives of neural crest in the nervous system. | Ectomesenchyme; spinal, sympathetic and parasympathetic ganglia; Schwann cells; pigment cells
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| Define neurulation. | Formation of the neural tube and eventual formation of the central nervous system
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| List the three initial swellings of the neural tube. | Prosencephalon (forebrain), mesencephalon (midbrain), and rhombencephalon (hindbrain)
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| What specific structure is responsible for inducing the formation of the prosencephalon? | The prechordal plate lying beneath the neural tube
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| List the three flexures of the developing nervous system. | Cervical, pontine, tele cephalic
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| Which three regions of the developing CNS form the brain stem? | Myelencephalon, metencephalon, mesencephalon
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| List the cephalic enlargements of the neural tube, their divisions and what each division forms in the fully developed brain. | Prosencephalon – telecephalon (cerebrum) and diencephalon (thalamus/hypothalamus); Mesencephalon – mesencephalon (substantia nigra, basal ganglia); Rhombencephalon – metencephalon (pons & cerebellum) and myelencephalon (medulla oblongata).
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| Which region of the three vesicle stage of CNS development eventually develops the least? | The mesencepahlon, joins the diencephalon (thalamus/hypothalamus rostrally) and the metencephalon (pons) caudally
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