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Alcohol use is a major contributing factor for head injuries, motor vehicle injuries (27%), interpersonal violence (18%), suicides (18%), and epilepsy (13%). [197] Beyond the financial costs that alcohol consumption imposes, there are also significant social costs to both the alcoholic and their family and friends. [67]
Alcohol depresses the central nervous system, slowing cerebral messaging and altering the way signals are sent and received. Progressively larger amounts of alcohol are needed to achieve the same physical and emotional results. The drinker eventually must consume alcohol just to avoid the physical cravings and withdrawal symptoms.
Symptoms of varying BAC levels. Additional symptoms may occur. The short-term effects of alcohol consumption range from a decrease in anxiety and motor skills and euphoria at lower doses to intoxication (drunkenness), to stupor, unconsciousness, anterograde amnesia (memory "blackouts"), and central nervous system depression at higher doses.
Alcohol tolerance is increased by regular drinking. [1] This reduced sensitivity to the physical effects of alcohol consumption requires that higher quantities of alcohol be consumed in order to achieve the same effects as before tolerance was established. Alcohol tolerance may lead to (or be a sign of) alcohol dependence. [1]
Alcohol use disorder (AUD) is defined as a medical condition characterized by an impaired ability to stop or control alcohol use despite adverse social, occupational, or health consequences. [124] Excessive alcohol use can lead to health-related illness and continuous alcohol engagement can ultimately lead to death.
Alcohol abuse affects neurons in the frontal cortex that typically have a large soma, or cell body. This type of neuron is more susceptible to Alzheimer's disease and normal aging. Research is still being conducted to determine whether there is a direct link between excessive alcohol consumption and Alzheimer's disease. [8]
Alcohol dependence refers to an entity in which only alcohol is the involved addictive agent. Alcoholism refers to an entity in which alcohol or any cross-tolerant addictive agent is involved. In alcohol dependence, reduction of alcohol, as defined within DSM-IV, can be attained by learning to control the use of alcohol.
The level of ethanol consumption that minimizes the risk of disease, injury, and death is subject to some controversy. [16] Several studies have found a J-shaped relationship between alcohol consumption and health, [17] [18] [2] [19] meaning that risk is minimized at a certain (non-zero) consumption level, and drinking below or above this level increases risk, with the risk level of drinking a ...