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Questions and Answers
Which germ layer gives rise to the neural plate during neurulation?
What is the name of the open cranial and caudal ends of the neural tube that are closed off before the end of the fourth week?
What do cells at the edge of each neural fold form alongside the neural tube during neurulation?
What are predominantly sensory neurons in function and receive dorsal nerve roots arising from spinal ganglia?
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What is the process of formation of the neural tube from the ectoderm known as?
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Which part of the neural tube gives rise to predominantly sensory neurons and receives dorsal nerve roots arising from spinal ganglia?
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What cells form alongside the neural tube during neurulation, giving rise to spinal and autonomic ganglion cells, melanocytes, and Schwann cells of peripheral nerves?
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What is the name of the open cranial and caudal ends of the neural tube that are closed off before the end of the fourth week?
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What is the name of the thickening of the floor of the amniotic sac from which the entire nervous system originates?
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Study Notes
Neural Tube Development
- The neural plate arises from the ectoderm layer during neurulation, a critical stage in early embryonic development.
- Cranial and caudal ends of the neural tube are known as the neuropores, which close before the end of the fourth week of gestation.
Neural Tube Formation
- Cells at the edge of each neural fold form neural crest cells alongside the neural tube during neurulation, contributing to various structures in the body.
- The process of neural tube formation from ectoderm is called neurulation.
Neuron Development
- The dorsal horn of the spinal cord primarily contains sensory neurons, which receive dorsal nerve roots originating from spinal ganglia.
Neural Crest Cells
- Neural crest cells, formed alongside the neural tube, give rise to spinal ganglion cells, autonomic ganglion cells, melanocytes, and Schwann cells, all vital for peripheral nerve function.
Origin of the Nervous System
- The thickening of the floor of the amniotic sac, known as the neural plate, is from which the entire nervous system originates, signifying its foundational role in development.
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Description
Test your knowledge about the formation of the nervous system through neurulation, which involves the development of the neural plate into the neural tube and neural canal. Explore the key stages and events in this crucial process of embryonic development.
