Pituitary gland - Animation

The pituitary gland lies deep inside the head. It's often called the "master gland" because it controls many of the things other glands do. Just above the pituitary is the hypothalamus. It sends hormonal or electrical signals to the pituitary. These determine which hormones the pituitary will release. For example, the hypothalamus might send a hormone called GHRH, or growth hormone releasing hormone. That would trigger the pituitary's release of growth hormone, which affects the size of both muscle and bone. How important is this? Not getting enough during childhood can cause pituitary dwarfism. Getting too much can cause the opposite condition called gigantism. In a body that has already matured, too much growth hormone can cause acromegaly. With this condition, facial features become rough and course; the voice becomes deeper; and hand, foot, and skull size expand. A different hormonal command from the hypothalamus might trigger the release of thyroid stimulating hormone or TSH. TSH causes the thyroid to release two hormones called T3 and T4 that stimulate metabolism in other cells throughout the body. The pituitary can also release a hormone called antidiuretic hormone, or ADH. It's produced in the hypothalamus and stored in the pituitary. ADH affects the production of urine. When it's released, the kidneys absorb more of the fluid that passes through them. That means less urine is produced. Alcohol inhibits the release of ADH, so drinking alcoholic beverages results in more urine production. The pituitary gland produces other hormones that control other bodily functions and processes. For instance, follicle stimulating hormone, or FSH, and luteinizing hormone, or LH, are hormones that affect the ovaries and egg production in women. In men, they affect the testes and sperm production. Prolactin is a hormone that affects breast tissue in nursing mothers. ACTH or adrenocorticotrophic hormone causes the adrenal glands to produce important substances similar to steroids. Growth, puberty, baldness, even sensations like hunger and thirst, are just a few of the processes that are influenced by the endocrine system.

Snoring - Animation

Many people snore when they sleep. Often, they may not even know they are snoring. Let's turn on the lights and see where the snoring is coming from. Snoring occurs when the airway is partially blocked by the uvula. The lungs need to inhale harder to make up for the reduction in how much air is getting into the body. The snoring comes from the vibration of the soft palate at the back of the mouth and the uvula, which extends down from it and covers the airway. Several things can cause someone to snore. For instance, it could come from drinking too much alcohol, nasal congestion, obesity, or enlarged tonsils and adenoids. Snoring, by itself, is not necessarily dangerous. But some people that snore have such severe blockage of air that it keeps them from getting a good night's sleep. This condition is called "sleep apnea". It's common, but also dangerous if it's left untreated.

Insomnia - Animation

Do you have trouble falling asleep at night? Or, do you go to sleep, only to wake up a few hours later and stay awake for hours at night? Well, let's today talk about insomnia. Your sleep-wake cycle is a delicate pattern run by something called circadian rhythms. These rhythms are physical, mental, and behavioral changes in your brain that roughly follow a 24-hour cycle. Your daily and nightly habits, many you learned as a child, may affect your circadian rhythms and how well you sleep at night. Poor sleep or lifestyle habits that may cause insomnia include going to bed at different times each night, daytime napping, and a poor sleeping environment such as too much noise or light. Spending too much in time in bed while you're awake can change your sleep patterns too. Likewise, working evenings or night shifts and not getting enough exercise can affect your sleep. People who use alcohol or recreational drugs may have trouble sleeping. Heavy smoking and drinking too much caffeine can also cause insomnia. And, even using some types of sleep medications a lot can cause you to lose sleep. Medical problems can cause insomnia too. People with anxiety disorders, bipolar disorder, thyroid disease, depression, and chronic pain problems may have trouble going to sleep or staying asleep. So, what do you do about insomnia? Well, it's important to remember that not everyone needs 8 hours of sleep every night. Some people do just fine on 6 hours of sleep, while others need much more. If you need more sleep, your doctor will probably ask about any medications you're taking, your drug or alcohol use, and your medical history. Spend some time thinking about your lifestyle and sleep habits. It's best to avoid caffeine and alcohol at night. If you don't exercise, starting regular exercise might help you sleep better. If you're depressed or anxious, talk to your doctor to see if relaxation techniques can help, if medication might be helpful, or if seeing a mental health provider is best. If you are suffering from bouts of insomnia, take heart. Most people can return to more normal sleep patterns when they make simple changes in their lifestyle or habits.

Stroke - Animation

When blood flow to an area of your brain stops, it's serious. It's called a stroke, and will often cause permanent, debilitating damage to your brain and change your life. Let's talk about strokes. If blood flow to your brain is stopped for longer than a few seconds, your brain can't get blood and oxygen. Brain cells die, causing permanent damage. There are two types, ischemic stroke and hemorrhagic stroke. Ischemic stroke happens when a blood clot forms in a very small artery, or when a blood clot breaks off from another artery and lodges in your brain. Hemorrhagic strokes can happen when a blood vessel in your brain becomes weak and bursts open. High blood pressure is the number one risk factor for strokes. People with atrial fibrillation (when your heart rhythm is fast and irregular), diabetes, a family history of stroke, and high cholesterol are most at risk. You are also at risk for stroke if you are older than age 55. Other risk factors include being overweight, drinking too much alcohol, eating too much salt, and smoking. Symptoms of a stroke usually develop suddenly, without warning. You may have a severe headache that starts suddenly, especially when you are lying flat, often when you awake from sleep. Your alertness may suddenly change. You may notice changes in your hearing, your sense of taste, and your sense of touch. You may feel clumsy or confused or have trouble swallowing or writing. So, how are strokes treated? A stroke is a medical emergency. Immediate treatment might save your life and reduce disability. Call your local emergency number -- or have someone call for you -- at the first sign of a stroke. Most of the time, someone having a stroke should be in the hospital within three hours after symptoms first begin. If a doctor suspects you've had a stroke, the doctor will check for problems with your vision, movement, feeling, reflexes, and your ability to understand and speak. You may have several tests to check for blocked or narrowed arteries. If the stroke is caused by a blood clot, you'll be given a clot-busting drug to dissolve the clot. Treatment depends on how bad your stroke is and what caused it. But you will probably need to stay in the hospital for a few days. Besides clot-busting drugs (called thrombolytics), you may need blood thinners, medicine to control high blood pressure, and surgery to unclog one of your carotid arteries-which carry blood to the brain. After your stroke, treatment will focus on helping you recover as much function as possible, and preventing future strokes. Most people need stroke rehabilitation therapy. If you can return home, you may need help making safety changes in your home and to help you with using the bathroom, cooking, dressing, and moving around your home. After a stroke, some people have trouble speaking or communicating with others, and a speech therapist might help. Depending on the severity of the stroke, you may have trouble with thinking and memory, problems with your muscles, joints, and nerves, trouble going to the bathroom, and difficulty swallowing and eating. Therapies and support for you and your family are available to help with each of these problems. Your treatment will also focus on preventing another stroke. You may need to be on several medications to help prevent this. And, eating healthy and controlling problems like diabetes and high blood pressure can be very important.

Diarrhea - Animation

Diarrhea isn't something most people want to talk about, much less have. Not only can diarrhea be uncomfortable, with gas, bloating, and that mad dash to the toilet, but it's a sign that you're either sick, or you've eaten something that really didn't agree with you. With diarrhea, the stools become loose and watery instead of solid. If you have diarrhea, there's a good chance you picked up a stomach virus. Or, you may have gotten food poisoning from eating food or drinking water that was contaminated with bacteria. A lot of people get sick from tainted food while traveling, because they're not used to the food and water in the foreign country. This is called traveler's diarrhea. Certain diseases that affect your intestines can cause diarrhea, including celiac disease, irritable bowel syndrome, Crohn's disease, and ulcerative colitis. If you've taken medications such as antibiotics or laxatives, diarrhea can be an unpleasant side effect. Protect your stomach by giving it healthy bacteria called probiotics. You can find them in yogurt and supplements. Among other things, probiotics help crowd out the bad bacteria that cause diarrhea. To avoid getting sick, wash your hands or use an alcohol-based hand sanitizer so bacteria can't get into your body. And when you travel to areas that may have unclean water, drink only bottled water without ice. Also avoid eating any uncooked fruits or vegetables that don't have a peel. Usually diarrhea goes away by itself pretty quickly, but it can stick around for a few days or even weeks. Loose stools are very watery, and they can dehydrate you pretty quickly. Stay hydrated by drinking at least 8 to 10 glasses of clear liquids a day. Drink one glass every time you have a loose bowel movement. To replace the electrolytes you're also losing with diarrhea, consider an electrolyte drink or rehydration solution. Also you may want to eat soup, pretzels, and other salty foods, as well as bananas and other high-potassium foods. Infants and children are especially likely to get dehydrated from diarrhea, and this can be really dangerous. You can tell your baby is dehydrated because his mouth will be dry, he'll make fewer wet diapers, and he won't produce tears when he cries. To keep your child hydrated, give 2 tablespoons of fluid every 30 to 60 minutes. You can use breast milk, formula, broth, or a solution like B. R. A. T. or Pedialyte, which also comes in a kid-friendly popsicle form. Diarrhea is an unpleasant, but fortunately short-term affliction most of the time. If it does stick around, call your doctor. The doctor will ask questions about your symptoms, where you've been traveling, and what new medicines you've taken or foods you've eaten. Until you're feeling better, drink plenty of fluids so you don't get dehydrated.

Tension headache - Animation

Do you often feel pain or discomfort in your head, scalp, or neck? Do your muscles get tight in these areas? If the answer is yes, you may suffer from tension headaches. Tension headaches are one of the most common forms of headaches. You can get them at any age, but they mostly happen in adults and adolescents. Tension headaches occur when your neck and scalp muscles get tense, or contract. These muscle contractions can typically be a response to stress, depression, a head injury, or anxiety. Often, you can get a tension headache when you hold your head in one position for a long time without moving it. Prime examples are typing at a computer, doing fine work with your hands, and using a microscope. You can even get a tension headache from sleeping in a cold room, from a cold, from drinking too much alcohol or caffeine, or from dental problems. If you have tension headaches, you'd probably describe your pain as being Dull, pressure-like and not throbbing. You may say it feels like a tight band or vice around your head. It may be all over, not just in one point or on one side of your head or it could be worse in your scalp, temples, or the back of your head, and maybe even your shoulders. Your doctor will ask you about what may be triggering your headaches. In fact, it's a good idea to keep a diary when you get headaches, and take it with you when you see your doctor. When you get a headache, write down the day and time the pain began. Include notes about what you ate and drank in the previous 24 hours, how much you slept and when, and what was going on in your life immediately before the pain started. Write down how long the headache lasted, and what made it stop. For some people, taking hot or cold showers or baths may relieve a headache. You may need to make lifestyle changes if you have a lot of tension headaches. For example, you made need to change your sleep habits, usually you'll need more sleep, get more exercise, and stretch your neck and back muscles. Your doctor may tell you to take over-the-counter painkillers, such as aspirin, ibuprofen, or acetaminophen if relaxation techniques do not work. If you plan to do something you KNOW will trigger a headache, taking one of these painkillers beforehand may help. Your doctor MAY prescribe narcotic pain relievers, muscle relaxants, or other medicines, but after a while you may start getting rebound headaches BECAUSE you are taking medicines. The best thing you can do if you get a lot of tension headaches is to lower your stress level, and the tension level in your head, neck, and shoulder muscles. Take breaks at the computer, learn to relax, avoid stressful situations, and make quiet time for yourself.

Gastroesophageal reflux disease - Animation

Do you feel a burning in your chest not long after you eat or lie down? If so, you may have Gastroesophageal reflux disease, or GERD. When we swallow food, it travels down our esophagus into the stomach, where it's greeted by a rush of Hydrochloric acid in the stomach to begin digestion. This acid is so powerful, it could eat the paint right off your car!Fortunately, there's a band of muscle between the stomach and the esophagus - called the Lower Esophageal Sphincter or L-E-S, that clamps down to prevent the stomach contents from moving or "refluxing" upward and burning the lining of the esophagus. If that band of muscle does not adequately clamp down, this backwash causes the irritation and burning that's known as heartburn or GERD. Maintaining good tight L-E-S muscle tone is the key to preventing this condition. Causes of GERD include: being overweight, smoking, and drinking too much alcohol. Certain foods, like chocolate and peppermint and if you're a woman, pregnancy can bring on GERDTo determine if you have GERD, your doctor may request an upper endoscopy exam to look into your esophagus and stomach to diagnose reflux. Other tests can measure the acid and amount of pressure in your esophagus, or if you have blood in your stool. If you do have GERD, lifestyle changes can help. First, avoid foods that cause problems for you and avoid eating large meals. If you're a little on the heavy side, try to lose some weight. Since most GERD symptoms are experienced lying down in bed, let gravity help. Elevating the head of your bed 4-6 inches using blocks of wood may help. If symptoms continue, see your doctor or a Gastroenterologist for evaluation and an upper endoscopy exam. Your doctor may suggest you take over-the-counter antacids or may prescribe stronger medications. Call your doctor if you are bleeding, feel like you are choking, have trouble-swallowing, or experience sudden weight loss. The good news is most people who have GERD do not need surgery. For the worst cases, surgeons may perform a laparoscopic procedure to tighten a weak L-E-S muscle. If you have occasional heartburn, antacid tablets can be used as needed. However! If you're having heartburn more than 3-4 times a week, see your doctor & take the prescribed medication to prevent this condition.

Alcoholic liver disease - Animation

Long-term alcohol abuse can lead to dangerous damage called alcoholic liver disease. Let's talk today about alcoholic liver disease. Alcoholic liver disease usually occurs after years of drinking too much. The longer you've abused alcohol, and the more alcohol you've consumed, the greater likelihood you will develop liver disease. Alcohol may cause swelling and inflammation in your liver, or something called hepatitis. Over time, this can lead to scarring and cirrhosis of the liver, which is the final phase of alcoholic liver disease. The damage caused by cirrhosis is unfortunately irreversible. To determine if you have alcoholic liver disease your doctor will probably test your blood, take a biopsy of the liver, and do a liver function test. You should also have other tests to rule out other diseases that could be causing your symptoms. Your symptoms may vary depending upon the severity of your disease. Usually, symptoms are worse after a recent period of heavy drinking. In fact, you may not even have symptoms until the disease is pretty advanced. Generally, symptoms of alcoholic liver disease include abdominal pain and tenderness, dry mouth and increased thirst, fatigue, jaundice (which is yellowing of the skin), loss of appetite, and nausea. Your skin may look abnormally dark or light. Your feet or hands may look red. You may notice small, red, spider-like blood vessels on your skin. You may have abnormal bleeding. Your stools might be dark, bloody, black, or tarry. You may have frequent nosebleeds or bleeding gums. You may vomit blood or material that looks like coffee grounds. Alcoholic liver disease also can affect your brain and nervous system. Symptoms include agitation, changing mood, confusion, and pain, numbness, or a tingling sensation in your arms or legs. The most important part of treatment is to stop drinking alcohol completely. If you don't have liver cirrhosis yet, your liver can actually heal itself, that is, if you stop drinking alcohol. You may need an alcohol rehabilitation program or counseling to break free from alcohol. Vitamins, especially B-complex vitamins and folic acid, can help reverse malnutrition. If cirrhosis develops, you will need to manage the problems it can cause. It may even lead to needing a liver transplant.