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What is funiculus and where is it located?
- Bundle of white matter
What is lemniscus?
- ribbons of white matter
What are nissel bodies and where are they located?
- stacks of reticulum
- located in the stroma of neurons
What is the most preferred site of neuronal synapse? Axons, Dendrites, Soma
What are the three types of Neurons and their functions?
- 1) Pseudounipolar: Sensory, posterior root
- 2) Bipolar: visual, olfactory, auditory, vestibular
- 3) Multipolar: motor
What is the glia limitans?
The contact between the podocytes of the astrocytes and the Pia Mater
What are two types of astrocytes?
- 1) Protoplasmic: gray matter
- 2) Fibrous: white matter
What is a radial glia?
Astrocyte that provides a migration pathway for new neurons
What do Astrocytes form when there is an injury?
Glial Scar (fluid filled area surrounded by podocyte extensions)
Do astrocytes regulate intracellular or extracellular environment?
What are three stages of microglia?
- 1) Ramified
- 2) bushy
- 3) Phagocytic
What cells myelinate the CNS and PNS?
- CNS : Oligodendrocyte
- PNS: Schwann cells
What is the cause of traumatic neuroma?
When an axon is damaged and the distance to reach a Von Bungner band is >15mm
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
What is Wallerian Degeneration?
- Myelin fragmentation due to injury
- Macrophage, microglia, cleaning of debris
What mediates docking between the SV and plasma membrane?
What type of pore is formed after docking of SV and plasma membrane?
What is the NT in the CNS?
What is the primary NT in the PNS?