Top videos

Vasectomy song
Vasectomy song Scott 22,217 Views • 2 years ago

A very funny song about vasectomy

Transition
Transition Scott 17,156 Views • 2 years ago

The period between stages one and two of labour

Laparoscopic Colon Resection
Laparoscopic Colon Resection M_Nabil 27,815 Views • 2 years ago

Laparoscopic Colon Resection video

Inspection of the mouth
Inspection of the mouth Surgeon 16,818 Views • 2 years ago

Inspection of the mouth

Examination of the heart
Examination of the heart Surgeon 41,734 Views • 2 years ago

Examination of the heart

David Beckham Knee Exam
David Beckham Knee Exam Surgeon 21,633 Views • 2 years ago

David Beckham Medical Exam

Endoscopic Treatment of Allergic Fungal Maxillary Sinusitis
Endoscopic Treatment of Allergic Fungal Maxillary Sinusitis Surgeon 20,550 Views • 2 years ago

Endoscopic Treatment of Allergic Fungal Maxillary Sinusitis

Cholecystectomy with Hysterectomy
Cholecystectomy with Hysterectomy Mohamed 14,990 Views • 2 years ago

A good case comprising of laparoscopic cholecystectomy with lap. assisted vaginal hysterectomy done simultaneously

Vasa Previa
Vasa Previa Scott 21,497 Views • 2 years ago

A video showing the Vasa Previa which is an abnormality of the placenta

Gynecomastia تصغير الثدى للرجال Dr. M. El-Rouby د. الروبى
Gynecomastia تصغير الثدى للرجال Dr. M. El-Rouby د. الروبى Mohamed El-Rouby 22,906 Views • 2 years ago

Gynecomastia means enlargement of male breast to resample female breast that is a common problem between males and causes many psychological problem
Dr. Mohamed El-Rouby
Consltant of Plastic surgery - Faculty of Medicine - Ain Shams University

Knee Exam
Knee Exam Scott 23,798 Views • 2 years ago

The Knee Exam
Observation:
1. Make sure that both knees are fully exposed. The patient should be in either a gown or shorts. Rolled up pant legs do not provide good exposure!
2. Watch the patient walk. Do they limp or appear to be in pain? When standing, is there evidence of bowing (varus) or knock-kneed (valgus) deformity? There is a predilection for degenerative joint disease to affect the medical aspect of the knee, a common cause of bowing. Varus Knee Deformity, more marked on the left leg. 3. Make note of any scars or asymmetry. Chronic/progressive damage, as in degenerative joint disease, may lead to abnormal contours and appearance. Is there obvious swelling as would occur in an effusion? Redness suggesting inflammation? 4. Is there evidence of atrophy of the quadriceps, hamstring, or calf muscle groups? Knee problems/pain can limit the use of the affected leg, leading to wasting of the muscles.

While both legs have well developed musculature,
the left calf and hamstring are bulkier than the right. 5. Look at the external anatomy, noting structures above and below the knee itself: 1. Patella 2. Patellar tendon 3. Quadriceps/Hamstring/Calf muscles 4. Medial and lateral joint lines. 5. Femur and Tibia 6. Tibial tuberosity


Ballotment (helpful if the effusion is large) 1. Slightly flex the knee which is to be examined.
2. Place one hand on the supra-pateallar pouch, which is above the patella and communicates with the joint space. Gently push down and towards the patella, forcing any fluid to accumulate in the central part of the joint.
3. Gently push down on the patella with your thumb.
4. If there is a sizable effusion, the patella will feel as if it's floating and "bounce" back up when pushed down.

Carpal Tunnel Release surgery
Carpal Tunnel Release surgery DrHouse 22,462 Views • 2 years ago

This is a video of a carpal tunnel release surgery

CSF shunt Insertion
CSF shunt Insertion Mohamed 18,387 Views • 2 years ago

Insertion of a CSF shunt

From axons to tracts
From axons to tracts Mohamed 21,054 Views • 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.

Loyola Upper Limb Exam Part 1
Loyola Upper Limb Exam Part 1 Loyola Medicine 13,137 Views • 2 years ago

Examination of the upper limb by Loyola medical school, Chicago

Ford Interlocking Suture
Ford Interlocking Suture M_Nabil 12,760 Views • 2 years ago

Ford Interlocking Suture

Subcutaneous Pattern Suture
Subcutaneous Pattern Suture M_Nabil 13,805 Views • 2 years ago

Subcutaneous Pattern Suture

Instrumental Tie
Instrumental Tie M_Nabil 9,495 Views • 2 years ago

Instrumental Tie

Use of Skin Stapler Remover
Use of Skin Stapler Remover M_Nabil 15,881 Views • 2 years ago

Use of Skin Stapler Remover

Lateral internal sphincterotomy
Lateral internal sphincterotomy Mohamed 42,387 Views • 2 years ago

Lateral internal sphincterotomy

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