Top videos

samer kareem
21,231 Views ยท 2 years ago

Liposuction & Facelift

Mohamed Ibrahim
21,212 Views ยท 2 years ago

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

academyo
21,203 Views ยท 2 years ago

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.

Scott
21,189 Views ยท 2 years ago

Laser Cystic Acne and Pimples Extraction

Scott
21,152 Views ยท 2 years ago

Symptoms of carcinoma of the breast

Scott
21,088 Views ยท 2 years ago

Tongue Lipoma Removal

samer kareem
21,087 Views ยท 2 years ago

Abscess drainage in neck

M_Nabil
21,081 Views ยท 2 years ago

Superficial Palpation of the Abdomen

Doctor
21,072 Views ยท 2 years ago

Central Venous Catheter Placement & Pulmonary Artery Catheter Video

Mohamed Ibrahim
21,052 Views ยท 2 years ago

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.

hooda
21,042 Views ยท 2 years ago

Watch that video of The World's Worst Spider Bites

Dr Albert Fish
21,041 Views ยท 2 years ago

http://www.hypodermic-injection.com This is a demonstration of an IM hypodermic injection administered in the gluteus maximus muscle. The patient is in the prone position.

Mohamed
21,034 Views ยท 2 years ago

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.

DrHouse
21,012 Views ยท 2 years ago

McMaster University technique of Laparoscopic Radical Nephrectomy

Mohamed
21,004 Views ยท 2 years ago

New robotic surgery procedure pioneered at Washington University School of Medicine in St. Louis to remove tumors from kidneys in a minimally invasive way

Surgeon
20,980 Views ยท 2 years ago

Ultrasound Guided Sclerotherapy for Varicose Veins

Surgeon
20,980 Views ยท 2 years ago

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

A.K. Venkatachalam
20,977 Views ยท 2 years ago

Revision knee replacement is peformed by Dr.Venkatachalam for lack of mobility. Infection. aseptic loosening are frequent causes requiring a revision. Madras Joint replacement center performs primary and revision knee replacements in a super specialty hospital in Chennai, India. Dr.Venkatachalam, the chief orthopedic surgeon is UK board certified.

samer kareem
20,965 Views ยท 2 years ago

In breastfeeding, the latch is the moment everything comes together: Your baby takes a big mouthful of your nipple and areola (or "latches on"), begins to suck, and draws out your milk. When your baby has established a good latch, your nipple soreness is minimized and your little one gets the nourishment he needs. How do you pull all that off? First and most important, have faith in yourself and your baby. "Babies are designed to breastfeed," says Emily Pease, R.N., international board certified lactation consultant (IBCLC), of Swedish Hospital's Breastfeeding Center in Seattle. "They are born with instincts that help them find Mom's breast and latch on often with very little assistance. And if problems do come up, there are lots of ways to troubleshoot." Here are more steps to get a good latch right from the start.

RAJESH PATEL
20,962 Views ยท 2 years ago

Prostate anatomy




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