Neuroembryology

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  • Created by: Jess
  • Created on: 14-05-14 16:02
What are the three tissue layers the body is derived from?
Endoderm, Ectoderm and Mesoderm.
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What is the Ectoderm?
The outermost layer that gives rise to the central and peripheral nervous system and epidermis.
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Outline the process of neurulation.
Starts by a folding at the lateral edges of the neural plate (neural groove), increases until the lateral edges meet to form the neural tube.
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What cells give rise to the neurones and glia of the PNS and CNS?
The epithelial cells that line the neural tube.
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What does the neural cavity give rise to?
The ventricular system which bathes the CNS in cerebrospinal fluid.
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What part of the neural tube gives rise to the brain?
The rostral neural tube.
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What are the names of the originally formed three vesicles?
Forebrain, midbrain and hindbrain.
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Name the 9 major brain regions.
Corpus callosum, cerebral cortex, hypothalamus, midbrain, cerebellum, medulla oblongata, spinal cord, pituitary gland, pons
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Which two vesicles divide to form the five vesicle embryo?
1 divides to form 1a and 1b and 3 divides to form 3a and 3b.Wh
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What is the function of A alpha fibres?
Motor functions - somatic proprioception.
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What is the function of A beta fibres?
Sensing touch and pressure.
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What is the function of A gamma fibres?
Motor spindles.
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What is the function of A delta fibres?
Detecting pain and temperature.
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What is the function of B fibres?
Preganglionic sympathetic.
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What is the function of C (DR) fibres?
Pain (second pain)
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What is the function of C (symp) fibres?
Postganglionic sympathetic.
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How does axon diameter vary down the classification?
Decreases as you go from A to C.
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How does conduction velocity vary down the classification?
Decreases as you go from A to C.
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Other cards in this set

Card 2

Front

What is the Ectoderm?

Back

The outermost layer that gives rise to the central and peripheral nervous system and epidermis.

Card 3

Front

Outline the process of neurulation.

Back

Preview of the front of card 3

Card 4

Front

What cells give rise to the neurones and glia of the PNS and CNS?

Back

Preview of the front of card 4

Card 5

Front

What does the neural cavity give rise to?

Back

Preview of the front of card 5
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