Researchers capture motion of arteries, lungs
by
Imre Kissik and Andras Szekely
... ries, image acquisition could be timed for the end of breath expiration.Images acquired with this technique allow for the calculation of gas exchange in small airways, and of shear stress in blood vessels.Further reading:Development of high-resolution 4D in vivo -CT for visualization of cardiac and respiratory deformations of small animals- Andras ...
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The “Don’t Squat” Recommendation
by
Eric C.
... a majority of knee pain sufferers relief from symptoms when they do have to do a squatting motion during their daily lives. Effectively, when one squats this way, it reduces shear stress at the knee and places the load more on the hip extensors: glutes, hamstrings, and adductor magnus. These muscles have big cross-sectional areas and can easily h ...
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Sleep Apnea and Rat Sperm Flow Dynamics
by
Dr. Steven P.
... Essentially, I was a physics major with an interest in solving biological problems. For my undergraduate research experience, I spent some time in a research lab that studied shear stress on rat sperm during ejaculation. Air or fluid with various densities or viscosities have very different flow characteristics depending on the nature of the channe ...
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How to Progress back to Deadlifting after a Back Injury
by
Eric C.
... They allow us to gradually reintroduce compressive loading in a situation where the center of gravity is maintained within the base of support. In other words, we minimize shear stress, and we make sure that the spine is in neutral, where it’s in the best position to handle compression. I usually start with body weight variations, then progress ...
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Research being conducted to learn if: MS is a chronic cerebral spinal venous insufficiency
by
stuart
... e been looking outside the box (brain) to find the problem in the brain.There is a great deal of evidence in both atherosclerosis and chronic venous disease that changes in shear stress can cause a biological response that is very similar to what we see in MS (see for example the work by John Bergan (4) ). In fact, it is a logical explanation a ...
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20 Things from Dr. McGill (1 of 4)
by
Eric C.
... the “true” lower back. Why? They subconsciously know to avoid motion in those segments most predisposed to injury, and the extra meat a bit higher up works to buttress the shearing stress that may come from any flexion that might occur higher up. Novice lifters, on the other hand, tend to get flexion at those segments – L5-S1, L4-L5, L3-L4, L2- ...
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This is from my good friend ( Er...
by
Tony G.
... ot the “true” lower back. Why? They subconsciously know to avoid motion in those segments most predisposed to injury, and the extra meat a bit higher up works to buttress the shearing stress that may come from any flexion that might occur higher up. Novice lifters, on the other hand, tend to get flexion at those segments – L5-S1, L4-L5, L3-L4, L2-L ...
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What is the link between hypertension and coronary artery disease ?
by
Dr. Sangareddi V.
... of blood pressure can increase the risk of stroke many times but rarely precipitate a coronary event( But may cause a LVF) . The reasons could be the coronary endothelial shearing stress is less than the cerebral blood vessels.Both cerebral and coronary circulation has auto regulatory mechanism . The coronary auto regulation is more robust in ...
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Are those trauma shears in your pocket, or...
by
Ellie
... lcohol prep or two if I’m doing transfers, cell phone (or it's in my jacket) right back pocket: pad of paper left back pocket: hand drawn map right cargo pocket: trauma shears, 2 pens (one zebra pen, one ‘scrote’ pen, penlight, protocol book left cargo pocket: stethoscope (if it’s not around my neck) EMS field guide radio strap: radio (if ...
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