The only way you can get the Digital Signal & have a good picture is if you buy a TV with built-in QAM tuner, which allows you to connect your in-coming cable(digital) to the back of the TV, without the need for a set-top box.ut your TV has no idea what to do with them. Your TV is analog only-it can display unscrambled analog channels over the raw cable, but that's it. So you need the cable company's box to decode and unscramble the digital signals.
Panic not a cause: Scintillating scotomas are most commonly caused by cortical spreading depression, a pattern of changes in the behavior of nerves in the brain during a migraine. Panic is not on the list of causes on any source i found. The first sentence is from the wikipedia article on scintillating scotomata.
A pinched nerve in the lower spine causes sciatica. The most common cause of sciatica is a herniated disc in the lumbar spine (lower back) that puts pressure on the sciatic nerve or a nerve root. A herniated disc can occur suddenly and cause acute pain or it may develop gradually.ciatica refers to pain along the path of the sciatica nerve. It is usually caused by pressure on the sciatic nerve. Fortunately, most cases of sciatica are not serious and usually resolve within six weeks.