At each level of the spine, there is a disc space in the front and paired facet joints in the back. Working together, these structures define a motion segment (Fig. 1A). Back pain may re­sult when injury or degenerative changes allow abnormal movement of the vertebrae to rub against one another, known as an unstable motion segment (Fig. 1B). Two vertebrae need to be fused to stop the motion at one segment. For example, an L4-L5 fusion is a one-level spinal fusion (Fig. 1C). A two-level fusion joins three vertebrae together and so on.

Vediographic-Electric Beat-Pacemakers and the human heart

This device could prevent migraine headaches.

Balloon Sinuplasty for Sinus Infection

This surgical procedure helps children defeat bone cancer.

Smoking kills, but what exactly is smoking doing to your body that kills it?

Most minor cuts you can treat yourself -- but know when to see a doctor:

Intrauterine insemination (IUI) is a fertility treatment that involves placing sperm inside a woman's uterus to facilitate fertilization. The goal of IUI is to increase the number of sperm that reach the fallopian tubes and subsequently increase the chance of fertilization

Depending on the fracture, the bone fragments may be fixed using screws, a plate and screws, or different wiring techniques. Because there is such a wide range of injuries, there is also a wide range of people's specific recovery time for ankle fracture surgery. It takes at least 6 weeks for the broken bones to heal.

You may have heard that some positions, such as your partner on top (missionary position), are better than others for getting pregnant. In fact, there's no evidence to back these theories up. Experts just haven't done the research yet. What experts have done, though, is use scanning to show what's going on inside when you're doing the deed. The research looked at two positions: the missionary position and doggy style. (Doggy style being when you're on all fours, and your partner enters you from behind). Common sense tells us that these positions allow for deep penetration. This means that they're more likely to place sperm right next to your cervix (the opening of your uterus). The scans confirm that the tip of the penis reaches the areas between the cervix and vaginal walls in both of these positions. The missionary position allows the penis to reach the area at the front of the cervix. The rear entry position reaches the area at back of the cervix. It's amazing what some experts spend their time doing, isn't it! Other positions, such as standing up, or woman on top, may be just as good for getting sperm right next to the cervix. We just don't know yet. So, in the meantime, enjoy some variety in your sex life and keep it fun while you're trying for a baby. And talk to others who are hoping to get pregnant by joining our Actively trying group. Do I have to have an orgasm to conceive? Obviously, it's very important for your partner to reach orgasm if you are trying for a baby. There is no evidence, however, that you need to orgasm to conceive. The female orgasm is all about pleasure and satisfaction. It doesn't really help to get the sperm to the egg. Gentle contractions in your uterus can help the sperm along, but these happen without you having an orgasm. So, it's really not vital for you to reach orgasm after your partner, or even to reach orgasm at all, for you to conceive.

Beta-blockers, also known as beta antagonists, beta-adrenergic blocking agents, or beta-adrenergic antagonists, are drugs that are prescribed to treat several different types of conditions, including hypertension (high blood pressure), angina, some abnormal heart rhythms, heart attack (myocardial infarction), anxiety, migraine, glaucoma, and overactive thyroid symptoms.

Only about a third of people with lupus get the tell-tale butterfly-shaped rash on their face. What you should know:

New method can eliminate lower back pain. watch to learn how.

PREPARING FOR GYNECOMASTIA SURGERY - This maybe the first time you are planning to undergo surgery. It's natural to feel little anxious about the whole process. Get more information www.bestbreastsurgeryindia.com | www.themedspa.us/cosmetic-surgery/male-breast-reduction.html

What are the best positions for labour? When your labour starts, you'll probably feel restless and want to move around and keep busy. Just take care that you don't get over-tired before your labour is properly under way. s your contractions get stronger, concentrate on them. Focus on what's happening to your body and your baby, and practise your breathing and relaxation exercises. Now is the time to find the positions and movements that help you to cope with your contractions. Your midwife should encourage and help you to keep moving around and find comfortable positions, preferably ones that are upright. You may think that you'll be most comfortable lying on the bed. But keeping as upright as possible will help: you to cope with your contractions you and your baby to cope better during labour You'll be able to keep moving by shifting your weight from one foot to another, or by rocking your pelvis. Some positions make it easier for your birth partner to massage your back, or breathe with you through the contractions. You could: Lean on a work surface, or on the back of a chair. Put your arms around your partner's neck or waist, and lean on him. Lean on the bed, with the height adjusted for your comfort, or on a window-sill. Kneel on a large cushion or pillow on the floor, and lean forwards on to the seat of a chair. Sit astride a chair, resting on a pillow placed across the top. Sit on the toilet, leaning forwards, or sit astride, leaning on to the cistern. Go on to all fours. Kneel on one leg, with the other leg bent..

There are several ways to do minimally invasive aortic valve surgery. Techniques include min-thoracotomy, min-sternotomy, robot-assisted surgery, and percutaneous surgery. To perform the different procedures: Your surgeon may make a 2-inch to 3-inch (5 to 7.5 centimeters) cut in the right part of your chest near the sternum (breastbone). The muscles in the area will be divided. This lets the surgeon reach the heart and aortic valve. Your surgeon may split only the upper portion of your breast bone allowing exposure to the aortic valve. For robotically-assisted valve surgery, the surgeon makes 2 to 4 tiny cuts in your chest. The surgeon uses a special computer to control robotic arms during the surgery. A 3D view of the heart and aortic valve are displayed on a computer in the operating room.

The most detailed explanation you'll ever hear on what makes some people's feet stink. (Not yours, obviously.)

Scientists are working on a pill that could replace exercise.

A spinal tumor is a growth that develops within your spinal canal or within the bones of your spine. It may be cancerous or noncancerous. Tumors that affect the bones of the spine (vertebrae) are known as vertebral tumors. Tumors that begin within the spinal cord itself are called spinal cord tumors. There are two main types of tumors that may affect the spinal cord: Intramedullary tumors begin in the cells within the spinal cord itself, such as astrocytomas or ependymomas. Extramedullary tumors develop within the supporting network of cells around the spinal cord. Although they don't begin within the spinal cord itself, these types of tumors may affect spinal cord function by causing spinal cord compression and other problems. Examples of extramedullary tumors that can affect the spinal cord include schwannomas, meningiomas and neurofibromas.

Every year, thousands of conventional total shoulder replacements are successfully done in the United States for patients with shoulder arthritis. This type of surgery, however, is not as beneficial for patients with large rotator cuff tears who have developed a complex type of shoulder arthritis called "cuff tear arthropathy." For these patients, conventional total shoulder replacement may result in pain and limited motion, and reverse total shoulder replacement is a better option.