Have you ever felt by the sudden tremor during sleep? Or even felt the illusion of falling and sudden waking up? Some may wonder about the reason behind this phenomenon and is treatable.

This tremor or convulsions experts call it the "hypnic jerk." But do not worry, this is completely normal, and is known as the "foot syndrome" affecting up to one in 10 people in Britain.
According to Jason Ellis, a professor of sleep science at Northumbria University, he said that the vibrations sleep onset occurs when the muscles shrink (usually the muscles of the legs) in a manner similar to involuntary spasm or strain.

No one really knows why it happens this matter, but there are some theories, where Dr. Ellis, "This Alinvdh Alnomih or chills Alnomih are just a view of the physiological system symptoms, as active members of the body turn and volitional into a state of relaxation and physical paralysis."

Dr. Ellis advised those who feel tremors sleep to avoid drinking caffeine strong and aerobics in the evening. He added: "on the part of nutrition, there is a group of Anecdotally, suggest that a lack of magnesium or calcium or iron can also increase the chances of suffering from hypnic jerk."