Severe leg pain, swelling, and tenderness after an injury can also be a sign of bone fracture. Aching or itching in the legs maybe a symptom of varicose veins, those prominent blue or purple veins on the legs or ankles. If you have the following symptoms, call your doctor: Persistent pain in your leg.
Alpha waves are one type of brain waves detected either by electroencephalography (EEG) or magnetoencephalography (MEG) and predominantly originate from the occipital lobe during wakeful relaxation with closed eyes.
Brainwave frequencies are measured in Hertz (Hz), meaning cycles per second. The more cycles per second, the greater the Hertz value. There are four major categories of brainwaves ranging from the most activity to the least activity. These are: BETA, ALPHA, THETA and DELTA.Each image below depicts a one second snapshot of human brainwave activity, as detected by an electroencephalogram (EEG).rainwave frequencies are measured in Hertz (Hz), meaning cycles per second. The more cycles per second, the greater the Hertz value. There are four major categories of brainwaves ranging from the most activity to the least activity. These are: BETA, ALPHA, THETA and DELTA.