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Questions and Answers
Which process involves retaining information over time?
Which process involves retaining information over time?
- Consolidation
- Encoding
- Retrieval
- Storage (correct)
What is the main type of memory involved in the process of acquiring new information?
What is the main type of memory involved in the process of acquiring new information?
- Working memory
- Short-term memory (correct)
- Sensory memory
- Long-term memory
According to Donald Hebb, what leads to stronger connections between brain areas?
According to Donald Hebb, what leads to stronger connections between brain areas?
- Activity in different areas
- Activity in the same time (correct)
- Activity in isolation
- Activity in unrelated tasks
What kind of changes in gene expression sustain the upregulation of glutamate receptors?
What kind of changes in gene expression sustain the upregulation of glutamate receptors?
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What does the nervous system consist of in terms of biological tissue?
What does the nervous system consist of in terms of biological tissue?
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Study Notes
Synaptic Plasticity
- Synaptic connectivity constantly changes in response to activity and other factors
- Provides the basic “wiring” of the brain’s circuits during development
- Basis of “learning” throughout life
Short-Term Plasticity
- Lasts from milliseconds to years
- Change in the amount of neurotransmitter (NT) released by the presynaptic neuron in response to an action potential (AP)
- Forms of enhanced NT release:
- Facilitation
- Augmentation
- Potentiation
- All related to altered Ca++ levels in the axon terminal
- Depression: decrease in NT release related to a decrease in available NT vesicles
Long-Term Plasticity
- Lasts from approximately 30 minutes to a lifetime
- Forms:
- Long-term potentiation (LTP)
- Long-term depression (LTD)
- Initially caused by post-translational modifications of existing proteins
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