The shoulder and arm receives its nerve supply through the brachial plexus. The brachial plexus is a complex network of nerves which come out of the neck, passes down to the front of the shoulder and then splits into many separate nerves to travel to different muscles and parts of the skin. Normally an arm movement is produced by initially thinking of the movement, then a message passes from the brain, down through the spinal cord to the appropriate nerve. Then the instruction to move is conveyed along the nerve to the specific arm muscle which then contracts and moves the arm.

Prompted by the hormone prolactin, the alveoli take proteins, sugars, and fat from your blood supply and make breast milk. A network of cells surrounding the alveoli squeeze the glands and push the milk out into the ductules, which lead to a bigger duct.

9 Months In The Womb: A Remarkable Look At Fetal Development Through Ultrasound

Arteriosclerosis occurs when the blood vessels that carry oxygen and nutrients from your heart to the rest of your body (arteries) become thick and stiff — sometimes restricting blood flow to your organs and tissues. Healthy arteries are flexible and elastic, but over time, the walls in your arteries can harden, a condition commonly called hardening of the arteries. Atherosclerosis is a specific type of arteriosclerosis, but the terms are sometimes used interchangeably. Atherosclerosis refers to the buildup of fats, cholesterol and other substances in and on your artery walls (plaques), which can restrict blood flow. These plaques can burst, triggering a blood clot. Although atherosclerosis is often considered a heart problem, it can affect arteries anywhere in your body. Atherosclerosis may be preventable and is treatable.

Red eyes usually are caused by allergy, eye fatigue, over-wearing contact lenses or common eye infections such as pink eye (conjunctivitis). However, redness of the eye sometimes can signal a more serious eye condition or disease, such as uveitis or glaucoma.

There many concerns and questions about how a breast augmentation procedure works. Dr. Linder a highly qualified plastic surgeon based in Beverly Hills, demystifies those worries. Dr. Stuart Linder is a Beverly Hills board certified plastic surgeon, specializing in body sculpting and reconstructive procedures including breast augmentation, reduction, lift, liposuction and tummy tuck. He is board-certified by the American Board of Plastic Surgery and is affiliated with the American College of Surgeons, the American Society of Plastic and Reconstructive Surgeons and the American Medical Association. Website: www.drlinder.com

Endometrial Ablation

Sometimes we live in different worlds...

The largest amount of pus I have ever seen!!

Compromise of the blood supply from microvascular disease, often in association with lack of sensation because of neuropathy, predisposes persons with diabetes mellitus to foot infections. These infections span the spectrum from simple, superficial cellulitis to chronic osteomyelitis. Diabetic foot infections typically take one of the following forms: Cellulitis Deep-skin and soft-tissue infections Acute osteomyelitis Chronic osteomyelitis Cellulitis Tender, erythematous, nonraised skin lesions are present, sometimes with lymphangitis Lymphangitis suggests group A streptococcal infection Bullae are typical of Staphylococcus aureus infection, but occasionally occur with group A streptococci

The video will describe mediastinal structures as they are seen on X-ray. Please see web site for disclaimer.

Watch that video of the 10 Most Invasive Parasites in the World

Lumbar puncture is a common emergency department procedure used to obtain information about the cerebrospinal fluid (CSF) for diagnostic and, less commonly, therapeutic reasons. Please refer to the full article on Lumbar Puncture for more details on the lumbar puncture procedure. Lumbar puncture is typically performed via “blind” surface landmark guidance. The surface landmark technique is reported to be successful in a high percentage of attempted lumbar punctures; however, surface landmark identification of underlying structures has been shown to be accurate only 30% of the time. [1] Unsuccessful identification of proper landmarks often leads to increased difficulty in obtaining CSF, if the procedure is performed, and a higher rate of complications. Few alternatives are available in these cases. If available, fluoroscopic-guided lumbar puncture may be performed. If not, treatment is sometimes initiated empirically without obtaining CSF. Disadvantages of using fluoroscopy include limited availability or necessary transport of the patient outside of the emergency department, inability to directly visualize the spinal canal, and inherent radiation exposure

Best Position for Getting Pregnant Fast

A Documentary on Uterine Transplantation. Dr. Edwin Ramirez pioneers this new breakthrough medical procedure, destined to change the world.

How amblyopia develops in children. Basically, if one eye doesn't see well from an early age, the wiring never forms correctly back to the occipital cortex.

Paronychias are most often caused by common skin bacteria (most commonly staphylococci bacteria) entering the skin around the nail that has been damaged by trauma, such as nail biting, finger sucking, dishwashing, or chemical irritants. Fungal infection also can be a cause of paronychia formation and should be considered especially in people with recurrent infection. Paronychia should not be confused with herpetic whitlow, which can form tiny pustules on the finger and is caused by a virus but is not typically located at the nail edge. Herpetic whitlow is not treated with an incision and drainage and therefore needs to be distinguished from a paronychia.

Psychological testing refers to the administration of psychological tests. A psychological test is "an objective and standardized measure of a sample of behavior" (p. 4). The term sample of behavior refers to an individual's performance on tasks that have usually been prescribed beforehand.

USMLE Step 2 CS - LOC This is just preview video. To get full access please visit our website : www.usmletutoring.com