Condenser Diaphragm-This diaphragm controls the amount of light entering the lens system. This feature is useful for viewing unstained biological specimens that are translucent. Reducing the amount of light improves contrast, making the specimen stand out against the background.
Sciatica occurs when the sciatic nerve is pinched, irritated or injured. Inflammation, arthritis or a displaced disk in the lower spine are often to blame. Doctors commonly treat sciatica with epidural injections into the spine.(The word âepiduralâ refers to a particular area in the spine.) The injections contain a steroid, which reduces inflammation. The injections can also contain a long-lasting painkiller.The different causes of sciatica may be one reason that studies come to different conclusions.The word âepiduralâ refers to a particular area in the spine.) The injections contain a steroid, which reduces inflammation. The injections can also contain a long-lasting painkiller. The different causes of sciatica may be one reason that studies come to different conclusions.
These tend to place less pressure on the sciatic nerve. So when you perform an exercise with your back in a âCâ curve or in other improper positions, you can harm the back. Any exercise, when improperly performed, can be painful to sciatica sufferers.