There has always been a lot of interest in accelerating brain function with the use of drugs and chemicals but I'm not aware of anything yet that stimulates the hippocampus to store long term memory.
Editors Contribution(0.00 / 0 votes)Rate this definition: alternating current. Is a type of electric current that changes direction periodically during the cycle. Alternating current is a type of electric current used in most household electricity systems in the US and throughout Europe.
Alternating current. If the current constantly changes direction, it is called alternating current, or a.c.. Mains electricity is an a.c. supply, with the UK mains supply being about 230V. It has a frequency [frequency: The number of repetitions per second of a wave. The unit of frequency is the hertz, 'Hz'. ] of 50Hz (50 hertz), which means it changes direction, and back again, 50 times a second. The diagram shows an oscilloscope screen displaying the signal from an a.c. supply.