Sensory and reflexes exam of the upper limb from the USMLE collection Sensory and reflexes exam of the lower limb

Magnetic resonance imaging (MRI) can be an important tool in the diagnosis of multiple sclerosis (MS). MRI can also be used to monitor the progression of the disease in people living with MS. How does it work? MRI uses very strong magnets, radio signals, and computer software to take 3-dimensional pictures of the inside of the body. Will I need contrast material? Maybe. Contrast material is a substance that temporarily changes the way imaging tools interact with the body. They are often used to visualize certain types of MS disease activity on the MRI. If your doctor thinks your scan requires this contrast material, you may get an injection before you get in the MRI machine. How long will it take? The time may vary based on the type of MRI. Be sure to discuss with your doctor in advance so he or she can provide you with exact timing. But don’t worry, you won’t have to stay still the whole time. The technician will let you know when they’re starting a new image.

Laser Cystic Acne and Pimples Extraction

Amyloidosis (am-uh-loi-DO-sis) is a rare disease that occurs when a substance called amyloid builds up in your organs. Amyloid is an abnormal protein that is usually produced in your bone marrow and can be deposited in any tissue or organ. Amyloidosis can affect different organs in different people, and there are different types of amyloid. Amyloidosis frequently affects the heart, kidneys, liver, spleen, nervous system and digestive tract. Severe amyloidosis can lead to life-threatening organ failure.

When a ventral hernia occurs, it usually arises in the abdominal wall where a previous surgical incision was made. In this area the abdominal muscles have weakened; this results in a bulge or a tear. In the same way that an inner tube pushes through a damaged tire, the inner lining of the abdomen pushes through the weakened area of the abdominal wall to form a balloon-like sac. This can allow a loop of intestines or other abdominal contents to push into the sac. If the abdominal contents get stuck within the sac, they can become trapped or “incarcerated.” This could lead to potentially serious problems that might require emergency surgery.

A video showing the phases of normal wound healing

Reusable Lap Instruments Multi-functional laparoscopic instruments. Choose from many handle styles, three instrument styles, 33cm or 45cm lengths, and dozens of dissectors, graspers, forceps, and scissors. Lap Needle Electrodes Monopolar needle electrodes for laparoscopic surgery.

Una revision unica de fertilizacion, desarrollo embrionario y de los procedimientos llevados acabo durante un ciclo de fertilizacion invitro. Tome un tour virtual exclusivo de unos de los laboratorios de fertilizacion invitro mas avanzados del mundo y con tecnologia de punta en reproduccion asistida para que conozca con mas detalle como RMA de NY realiza estos procedimientos bajo control estricto de calidad.
Este video proporciona documentacion acerca de la aspiracion de ovulos, inseminacion de ovulos, desarrollo embrionario desde etapa de clivaje (2-3 dias) hasta etapa de blastocisto (5-6 dias), inyeccion intracitplasmatica de esperma (ICSI)), eclosion asistida, transferencia embrionaria y congelacion de embriones.

Mexico City
Dr. Benjamin Sandler
Reproductive Medicine Associates International
http://www.rmany.com/mexicointernatio...
Prolongacion Paseo de la Reforma 1232, Oficina 1213
Colonia Lomas de Bezares
Delegacion Miguel Hidalgo
Mexico, Distrito Federal 11910
Tel: 011-52-55-2167-2515
Fax: 011-52-55-2167-6434

Liposuction & Facelift

the technique of retrograde intubation to maintain the patient's airway.

Subtle pneumonia. How to diagnose pneumonia on chest x-ray. Please visit my website for disclaimer. www.academyofprofessionals.com. Multiple choice questions are also available for those who might want to enhance their knowlege or test themselves.

Adenocarcinoma of the Transverse Colon taken by Dr. Julio Murra Saca This is the case of a 42 year-old male, with no significant past medical history presented with abdominal pain and no weight loss was reported. Adenocarcinoma of the colon is a primary cause of mortality and
morbidity in North America and Western Europe. Colonic cancers are the most common GI carcinomas and have the best prognosis. The 5-year survival rate is approximately 50%.
Survival rates may be improved by screening and removal of adenomatous polyps. Almost all colonic cancers are primary adenocarcinomas.

Abscess drainage in neck

Symptoms of carcinoma of the breast

Central Venous Catheter Placement & Pulmonary Artery Catheter Video

Watch that video of The World's Worst Spider Bites

Superficial Palpation of the Abdomen

McMaster University technique of Laparoscopic Radical Nephrectomy

The complex circuitry interconnecting different areas in the brain, known collectively as white matter, is composed of millions of axons organized into fascicles and bundles. Upon macroscopic examination of sections of the brain, it is difficult to discern the orientation of the fibers. The same is true for conventional imaging modalities. However, recent advancements in magnetic resonance imaging (MRI) make such task possible in a live subject. By sensitizing an otherwise typical MRI sequence to the diffusion of water molecules it is possible to measure their diffusion coefficient in a given direction1. Normally, the axonal membrane and myelin sheaths pose barriers to the movement of water molecules and, thus, they diffuse preferentially along the axon2. Therefore, the direction of white matter bundles can be elucidated by determining the principal diffusivity of water. The three-dimensional representation of the diffusion coefficient can be given by a tensor and its mathematical decomposition provides the direction of the tracts3; this MRI technique is known as diffusion tensor imaging (DTI). By connecting the information acquired with DTI, three-dimensional depictions of white matter fascicles are obtained4. The virtual dissection of white matter bundles is rapidly becoming a valuable tool in clinical research.

Our journey begins with a transverse section of tightly packed axons as seen through light microscopy. Although represented as a two-dimensional "slice", we see that these axons in fact resemble tubes. A simulation of water molecules diffusing randomly inside the axons demonstrates how the membranes and myelin hinder their movement across them and shows the preferred diffusion direction --along the axons. The tracts depicted through DTI slowly blend in and we ride along with them. As we zoom out even more, we realize that it is a portion of the corpus callosum connecting the two sides of the brain we were traveling on and the great difference in relative scale of the individual axons becomes evident. The surface of the brain is then shown, as well as the rest of the white matter bundles--a big, apparently chaotic tangle of wires. Finally, the skin covers the brain.

With the exception of the simulated water molecules, all the data presented in the animation is obtained through microscopy and MRI. Computer algorithms for the extraction of the cerebral structures and a custom-built graphics engine make our journey through the brain's anatomy possible in a living person.

Micrograph courtesy of Dr. Christian Beaulieu, University of Alberta.
Music by Mario Mattioli.

References:
1. Stejskal, E.O., et al., J. Chem. Phys., 1965. 42:
2. Beaulieu, C., NMR Biomed., 2002. 15:435-55.
3. Basser, P.J., et al., J. Magn. Reson. B, 1994. 103:247-54.
4. Mori, S., et al., NMR Biomed., 2002. 15:468-80.

examination of Cranial nerves VI and VII: abducent and facial nerves