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| REACTIONS TO
INJURY WITHIN THE NEURON: |
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| Immediately - |
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| 1. Synaptic transmission off |
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| 2. Cut ends pull apart and seal up, and
swell, |
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| due to axonal
transport in both directions |
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| Hours
later - |
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| 3. | Synaptic
terminal degenerates - accumulation of NF, vesicles. |
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| 4. | Astroglia
surround terminal normally; |
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| after axotomy, astroglia interpose
between terminal and target |
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| and cause terminal to be pulled
away from postsynaptic cell. |
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