Long-term potentiation is best described as

• A. A long-lasting strengthening of synapses following high-frequency stimulation.
• B. A short-term decrease in synaptic responsiveness following low-frequency stimulation.
• C. A biochemical decay of synaptic efficacy after neurotransmitter depletion.
• D. A structural change in neurons unrelated to synaptic strength.

Answer: (A)