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Best Answer: Alcohol or ethanol affects the human nervous system by inhibiting signals between the brain, nerve endings and spinal cord. When people drink, their bloodstream absorbs the alcohol and nervous system functions slow down dramatically--this is the buzz or numbness people commonly feel after drinking.
Neurons provide sensation throughout the body and control a wide variety of voluntary and involuntary actions and processes. Alcohol can damage nerve function when it accumulates inside the body. Heavy alcohol intake for extended periods of time can lead to alcoholic neuropathy, a serious form of nerve damage.