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What is funiculus and where is it located?
- Bundle of white matter
- CNS
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What is lemniscus?
- ribbons of white matter
- CNS
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What are nissel bodies and where are they located?
- stacks of reticulum
- located in the stroma of neurons
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What is the most preferred site of neuronal synapse? Axons, Dendrites, Soma
Dendrites
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What are the three types of Neurons and their functions?
- 1) Pseudounipolar: Sensory, posterior root
- 2) Bipolar: visual, olfactory, auditory, vestibular
- 3) Multipolar: motor
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What is the glia limitans?
The contact between the podocytes of the astrocytes and the Pia Mater
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What are two types of astrocytes?
- 1) Protoplasmic: gray matter
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What is a radial glia?
Astrocyte that provides a migration pathway for new neurons
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What do Astrocytes form when there is an injury?
Glial Scar (fluid filled area surrounded by podocyte extensions)
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Do astrocytes regulate intracellular or extracellular environment?
Extracellular
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What are three stages of microglia?
- 1) Ramified
- 2) bushy
- 3) Phagocytic
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What cells myelinate the CNS and PNS?
- CNS : Oligodendrocyte
- PNS: Schwann cells
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What is the cause of traumatic neuroma?
When an axon is damaged and the distance to reach a Von Bungner band is >15mm
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Which produces growth factors: schwann cells or oligos?
Schwann Cells: This is why a cell can regrow in the PNS and not in the CNS
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What is Wallerian Degeneration?
- Myelin fragmentation due to injury
- Macrophage, microglia, cleaning of debris
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What mediates docking between the SV and plasma membrane?
Calcium
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What type of pore is formed after docking of SV and plasma membrane?
Fusion Pore
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What is the NT in the CNS?
Glutamate
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What is the primary NT in the PNS?
Ach
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