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Cranial nerves I and II
Cranial nerves I and II Surgeon 12,170 Views • 3 years ago

Examination of the first and the second cranial nervers: Olfactory and Optic nerves

Histology of Gall Bladder
Histology of Gall Bladder Histology 4,313 Views • 3 years ago

Histology of Gall Bladder

Pulmonary Artery Swan Ganz Catheter
Pulmonary Artery Swan Ganz Catheter Alicia Berger 9,513 Views • 3 years ago

Pulmonary Artery Swan Ganz Catheter

Litholapaxy (crushing of a bladder stone)
Litholapaxy (crushing of a bladder stone) Mohamed 15,324 Views • 3 years ago

Endoscopic crushing of a bladder stone

The Battle of Lupus
The Battle of Lupus News Canada 6,070 Views • 3 years ago

Targeting a new way of life.

Histology of Pituitary
Histology of Pituitary Histology 3,802 Views • 3 years ago

Histology of Pituitary

Yervoy Approved in Canada for Deadly Skin Cancer
Yervoy Approved in Canada for Deadly Skin Cancer News Canada 5,353 Views • 3 years ago

How revolutionizing advancements helps patients with metastatic melanoma kick start the body’s immune system to increase survival.

Carpal Tunnel Release surgery
Carpal Tunnel Release surgery DrHouse 22,510 Views • 3 years ago

This is a video of a carpal tunnel release surgery

Deep Brain Stimulation
Deep Brain Stimulation Scott 19,094 Views • 3 years ago

Vanderbilt Medical Center neurosurgeons and neurologists will be online demonstrating their 4-stage innovative technique used for Deep Brain Stimulation (DBS). Deep brain stimulation therapy utilizes an implantable neuro-stimulator to treat movement disorders such as Parkinson's disease, essential tremor, and dystonia.

Brain Concussion in Sports
Brain Concussion in Sports Surgeon 7,550 Views • 3 years ago

Brain Concussion in Sports

腹腔镜十二指肠球部溃疡穿孔修补术
腹腔镜十二指肠球部溃疡穿孔修补术 wang bzh 2,438 Views • 3 years ago

腹腔镜十二指肠球部溃疡穿孔修补术

From axons to tracts
From axons to tracts Mohamed 21,098 Views • 3 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.

Traitement Diabete 2
Traitement Diabete 2 lorenzo 1,226 Views • 3 years ago

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Ne dépensez plus des milliers d'euros en médicaments qui combattent la maladie de l'extérieur.
Ne vivez plus une vie de restrictions.
Ne souffrez plus!!!

Oubliez de changer constamment de médicaments prescrits, de mesurer le niveau de glucose et de vous injecter l'insuline.


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Inserting main port in laparoscopy
Inserting main port in laparoscopy Magdy 5,930 Views • 3 years ago

Inserting main port in laparoscopy

Loyola Breast Examination part 1
Loyola Breast Examination part 1 Loyola Medicine 59,435 Views • 3 years ago

Medical breast examination of a female from Loyola University,Chicago

Adult Circumcision
Adult Circumcision Scott 344,736 Views • 3 years ago

Adult circumcision video

Vaser High Definition Liposuction
Vaser High Definition Liposuction Patrick Rivera 3,459 Views • 3 years ago

Vaser is additionally called as Ultrasonic Assisted Lipoplasty. The 4 th era vaser has exceptional plan and capacities. The test has single or various rings to appropriate the ultrasonic vitality radially emulsifying the fat consistently. Less the quantity of rings more power is produced at the tip which is valuable for intense fibrofatty tissue or remedial surgery.
see details here : http://vaser-dubai.com

Orchidopexy of the testis
Orchidopexy of the testis Scott 20,340 Views • 3 years ago

Testis operation

Medical hints (hematology question)
Medical hints (hematology question) medical hints 2,632 Views • 3 years ago

visit https://www.facebook.com/medical.hint





to check the answers

“The Talk”
“The Talk” Info4YourLife 13,116 Views • 3 years ago

A simple conversation can go a long way in protecting your loved ones from atrial fibrillation related strokes.

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