Damage To The Nervous System Flashcards
Retrograde degeneration refers to the death of a neuron cell when…
When the soma dies after axon has broken off
Retrograde degeneration can be avoided if there is an ____ ____ with ____ to sustain the neuron
Axon collateral; synapse
Anterograde degeneration refers to the death of a neuron cell when…
Following an injury to the axon
Injured neuron in the ____ nervous system can regrow at a ____ rate, but those in the ____ nervous system can never regrow because of a substance secreted by oligodendroglia called ____.
Peripheral; slow; central; Nogo
The swelling of brain ____ neurons, and there is no way to ____.
Kills; stop
After the swelling has calmed, the approaches of recovering neuronal damage are aimed at…
… Stimulating sprouting of existing neurons
Collateral axon sprouting is defined as…
The growth of intact axons into neighboring denervated territory
Collateral axon sprouting can be stimulated by…
- Electrical stimulation in the spinal cord
- Biologically active I plan at the site of damage
If axon 2 is damaged and axon 1 sprouts new dendrites by ____ ____ ____, the information from axon 2 is ____ and the ____ neuron need to adapt to new information.
Collateral axon sprouting; lost; postsynaptic
The ability and the speed of neuron cells to undergo regrowth is limited by ____.
Age
Denervation supersensitivity describes the phenomenon in which…
…The loss of synapses leads to an increase in neurotransmitter in surviving sites.
L-DOPA helps with the symptoms of Parkinson’s disease because…
*Also, what’s its related side effect?
…it is a precursor of dopamine and are taken up by every dopamine receptor.
*By taking L-DOPA, however, ALL parts of the brain are going to receive extra dopamine.
