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No other thing affects the brain as much as alcohol does. Alcohol has an innate property of messing up with each and every part of the human body .stumbling walk, slurred words and memory lapses are all external interpretations of the effects of alcohol on the human brain. Some of the different physical characters are caused by the following affects on the brain
1. Slurred voice: this is caused by alcohol affecting the neuron transmitters in the human brain. Neural transmitters are chemical impulses which travel through out the body and control thought process, emotions and behavior. Neural transmitters are of two types inhibitory and exciter. Exciter neural transmitters excite the brain activity while inhibitory neural transmitter slows down brain activity. When we have alcohol it inhibits the exciter neural transmitters as a result there is a physiological slow down and you have a slurred voice.
2. Stumbling walk: it is the cerebral region, where thought processing and consciousness are centered .when we drink alcohol it depresses the behavioral inhibitory centers, making the persons involuntary activities slow. Along with it also slows down the processing of information from the eyes, ears, mouth and other senses; and it inhibits the thought processes, making it difficult to think clearly .it slows down the involuntary functions as a result the persons limbs tend to react late and as a result a person under the influence of alcohol tends to stumble while walking.
3. Memory lapses: Our human brain has two parts of memory short term memory and longterm. Once an event has occurred it is stored in the short term memory for a few moments and it is then shifted onto the long term memory. However whether it is shifted into the long term memory depends on a number of underlying factors such as repetition of memory and focus.
So when we drink large quantities of alcohol we tend to have memory lapses. This is because alcohol has several memory inhibiting components which resist the transfer of memory from short term to long term. So a person after a heavy dose of alcohol might remember things immediately but if you ask them similar things after a long interval of time it becomes difficult for them to retain. However people normally are capable of retrieving information placed in long-term storage prior to acute intoxication. The level of memory impairment is a very relative thing and cannot be properly ascertained as to the exact amount of impairment occurred and what amount of alcohol causes what level of impairment.
4. Sleepiness: involuntary functions in the body are controlled by a special part of the brain called the medulla. When a person has too much of alcohol it affects the medulla as a result of which the medulla decreases the body temperature and induces sleep on the person.
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