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13 Cards in this Set
- Front
- Back
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What are the three initial brain segmentations? What segment is each part called?
At how long into pregnancy does this occur? |
1. forebrain- prosencephalon
2. midbrain- mesencephalon 3. hindbrain- rhombencephalon 4 weeks |
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What are the secondary brain vescsicles (in order from superior to inferior)?
What are structures that are within each brain region? |
1. telencephalon, - cerebrum
2. diencephalon, - epithalumus, thalamus, hypothalamus 3. mesencephalon- cerebral penduncles, Sup/inf colliculi 4. metencephalon- cerebellum/pons 5. myelencephalon- medulla oblongata |
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Which plates of the neural tube are connected by the roof and floor? What kind of sensory do they become? Where do they form?
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Form in the grey matter
1. Roof- dorsal/alar- sensory (afferent) 2. floor- ventral/bilateral basal- motor (efferent) |
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What are the 2 types of the segmentation of the neural tube?
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1. longitudinal: brain from spinal cord
2. cross-sectional- gray (cell bodies of neurons) and white (axons) matter |
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What is the general cascade of cell lineages in developing CNS?
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a. cells undergo mitosis and become biopotential progenitor cell
b. Biopential cells an become glial or neuronal lineage progenitor cells i. glial- makes cells to protects neurons ii. neuronal- make neurons |
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In the layers of the neural tube what are the three main zones and explain what developes in each and how cells get there...
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1.ventricular zone- ependymal, some leave to intermediate mantle (cortical zone)
2. cortical zone/intermediate mantle- neuronal cell bodies and glia form grey matter 3.cortical/marginal zone- myelinated neuronal parts move to become white matter |
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How are spinal ganglia formed and what are roles?
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formed from left over neural crest cells.
They are not part of the CNS just cells bodies |
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What kind of nervous system organization does CNS have compared to PNS?
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1. CNS- white matter in myelinated axons in tracts, grey matter originates and ends in CNS
2. PNS- nerves, glanglia and nerve endings |
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What are some abbreviations learned to label Somatic/Autonomic/General and motor vs sensory
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Somatic "S"
Autonomic "V" (visceral) General- "G" Motor- "E" (efferent) Sensory- "A" |
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What does dorsal or ventral root ganglion carry?
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dorsal- sensory toward cord
ventral- motor away from cord |
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What is significance of spinal nerve in body?
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comes from merging after dorsal and ventral root ganglions and allows for information in and out in one nerve
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Which type of rami go to hypomere vs. epimere..
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hypomere (ventral rami (motor)
epimere (dorsal rami sensory) |
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Contrast the neuron numbers involved in afferent and efferent Somatic vs. Autonomic nervous system...
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Somatic = receptor one neuron (sensory), one neuron receptor (motor)
Autonomic= Receptor one neuron (sensory), 2 axons out, (pre-post ganglionic) |
