Doctor insights on:
Skeletal Muscle Location And Function
It is a body tissue that has the ability to contract. It shortens and generates force. It relaxes and returns to its original length. Muscles move joints, stabilize the body, move air and food through the organs, act as valves for bladder, bowel and other organs. They control movement of the eyes. They help us express ourselves by changing the shape of our ...Read more
How much ischemia or partial ischemia can muscles handle before permanent damage is done? I.E. Skeletal muscle like lower leg
Different cells hit: Neurologic muscle weakness is due to any disorder of the nerves activating muscles that causes weakness. Metabolic muscle weaknees is due to a disorder, usually of the muscle cells themselves, that leads to incomplete/inappropriate use of "fuel" conversion into energy by the muscle cells. ...Read more
Need advice on what is the the difference between neurological muscle weakness and metabolic muscular weakness?
Neuro vs. Metabolic: These two symptoms can overlap in some ways but generally speaking neurologic muscle weakness will effect a group of muscles controlled by those nerves. A common stroke in the cerebral hemisphere is a good example, weakness occurs on 1/2 of the body. Metabolic weakness should effect all of the muscles in your body. ...Read more
Type 1 and 2: All skeletal muscle has a mixture of type 1 (slow twitch) and type 2 (fast twitch) muscle fibers, including the psoas. ...Read more
One is observed: Generally speaking, muscle weakness is something a patient perceives and something that we can test for in physical examination by doing a manual muscle test, etc. Atrophy is something we observe or visualize. In some cases they can be caused by the same thing (ex. nerve injury, immobilization, joint trauma), sometimes they are separate issues. ...Read more
See below: The heart is a muscle with very special qualities. The main bulk of heart muscle helps pump blood to the lungs to get oxygen and then pumps that oxygen rich blood to the rest of the body. Then there is a special type of cardiac fibers that helps conduct electrical impulses from two "pacemaker" sites in the heart, the sa and av nodes which allow the heart to keep pumping for your entire life. ...Read more
Aerobics: Do marathon runners look like arnold schwartenegger? ...Read more
Different: Cardiac muscle is different than skeletal muscle (arms, legs, back, etc). Skeletal muscle contracts when stimulated by the nerves that supply it. Heart muscle fires spontaneously as various electrolytes change concentration in the surrounding tissue. The area called the sinus node typically passes the threshold first thus firing the electrical impulse. This area is modulated by brain inputs. ...Read more
What can cause high blood levels of myoglobin other than damage to skeletal muscle or heart muscle?
Can a tear muscle in the back cause arm and leg weakness muscle astropy and also abdominal weakness.and can MRI find torn muscle and legaments.
A : torn muscle in back will not affect nerves supplying arms and legs. ...Read more
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