How Alcohol Influences Your Brain
When you consume alcohol, it enters your bloodstream and promptly targets your brain, modifying your emotions and behaviour. Alcohol acts on neurotransmitters such as dopamine and serotonin, which enhance feelings of pleasure and may encourage further drinking. However, it also impacts other neurotransmitters like glutamate and GABA, which are crucial for regulating brain activity and ensuring safety. Consuming alcohol rapidly can lead to a dangerous accumulation in the body, potentially resulting in severe conditions such as alcohol overdose, necessitating hospitalisation or worse. The susceptibility to overdose varies and depends on multiple factors, including age, sex (women often experience the effects of alcohol more swiftly and intensely than men), weight, drinking pace, food consumption, overall health, and the use of other substances, legal or illegal.
How Alcohol Modifies Your Behaviour
Alcohol alters brain chemicals, changing your emotions and actions.
Engagement in Violence
Alcohol does not directly cause violence but affects brain areas responsible for restraint and judgement. Consequently, this may lead to misinterpretation of social cues or heightened aggression post-drinking.
Slurring of Speech
Alcohol impacts the signalling within your cerebellum and basal ganglia, both vital for motor functions, affecting your reaction times and impairing muscle control, which can result in slurred speech.
Incidents of Trips and Falls
The cerebellum also coordinates balance, movement, and posture. Alcohol consumption can slow reaction times and disrupt this coordination, leading to increased incidents of trips and falls.
Sexual Behaviour
Alcohol diminishes inhibitions and impairs judgement, heightening the likelihood of engaging in risky sexual behaviours. This effect is due to alcohol’s influence on the hypothalamus and pituitary gland, which are integral to sexual response and arousal. While alcohol may increase libido, it can adversely affect performance, leading to erectile difficulties in men and reduced sensitivity and lubrication in women. Impaired judgment can also complicate the ability to give or interpret consent. In situations of uncertainty regarding consent, it is both safer and more ethical to abstain from sexual activity.
Induced Sleepiness
Alcohol serves as a depressant to the central nervous system, interacting with neurotransmitters to decelerate brain activity, which induces sleepiness. Although it may initially facilitate falling asleep, it detrimentally affects sleep quality by disrupting vital REM sleep stages.
Memory Blackouts
Episodes of not recalling specific events or entire nights are common because alcohol affects the hippocampus, a brain region essential for forming new memories. It inhibits the hippocampus from establishing new neuronal connections necessary for memory formation.
When to Visit the Emergency Room
Hospital emergency departments are reserved for critical injuries and life-threatening emergencies, including alcohol poisoning. Should someone exhibit symptoms of alcohol poisoning, it is imperative to call for an ambulance immediately, even if all symptoms are not present.
Signs and Symptoms of Alcohol Poisoning
- Mental confusion
- Difficulty in remaining conscious or waking up
- Vomiting
- Seizures
- Slow breathing (fewer than eight breaths per minute)
- Irregular breathing (more than ten seconds between breaths)
- Slow heart rate
- Clammy skin
- Extremely low body temperature
- Bluish skin colour or paleness, more discernible on the lips, gums, and under the
fingernails in people of colour.
How to Assist Someone Who Has Consumed Excessive Alcohol
DO:
- Stay with them to prevent choking on vomit or breathing cessation.
- Sit them upright if awake, preferably on the floor to avoid falls.
- If unconscious, lay them down in the recovery position, rolled onto one side with an ear
towards the ground to prevent choking.
- Ensure they are breathing.
- If conscious and able to swallow, provide sips of water.
- Keep them warm using a jacket or blanket.
DON'T:
- Allow further alcohol consumption.
- Give caffeinated beverages as these can exacerbate dehydration.
- Walk them around; it does not reverse an overdose and may lead to falls and injuries.
- Place them in a cold shower or bath due to risks of hypothermia, falling, or losing
consciousness.
- Induce vomiting; this could lead to choking.
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