What is positional nystagmus?

positional nystagmus is a very rapid movement of the eye over which the patient has no control and is brought or influenced by the position of the body and/or head. These quick eyes moves usually go with feelings of dizziness. There are many types of positioning nystagm differentiated according to a position that causes nystagmus to appear and direction of eye movements. The most common cause of position nystagm is benign paroxysmal position vertigo (BPPV). One specific type of nystagmus, positional alcohol nystagmus, is not related to any disease or dysfunction, but is related to alcohol absorption into the bloodstream.

Classification of position nystagmus include positive, downbeating, side and direction. UPBEATING NYSTAGMUS is visible when the patient lies with his head inclined and indicates BPPV in the rear channel of the inner ear. Downbeating nystagmus is similar, but it will be without leaning the head and Jándicates BPPV in the front channel. Side position nystagmus is perceived as movement from side to side when the patient lies but the cause of thisThe type is less certain. Changing the direction of position nystagmus causes movements that change the direction depending on whether the patient lies or fits. Another variant, cervical nystagmus, is associated with the compression of the cervical disc on the vertebral artery.

BPPV is explained as the accumulation of small pieces of debris that is sometimes called "ear rocks". These small crystals are made of calcium carbonate, theoretically as kidney stones and are officially known as swelling. They slowly reappear in the inner ear solution, so any symptoms they cause may stop before repeating for a certain period of time. Most BPPV cases are caused by a head trauma or simply aging. Some viruses and effects of surgery on the ear are altac known causes, but in many cases there is never a clear cause.

Eye movements caused by positional alcohol nystagmus (Pan) are sometimes confusedé as signs of horizontal view of nystagmus. Police use the horizontal view of Nystagmus (HGN) as one test for alcohol intoxication or illegal narcotics. To see exactly HGN, the entity lies on his side with his head in the settlement with the spine. If the head is tilted to one side, any nystagmus caused by the pelvis, which shows the presence of alcohol but does not indicate the level of intoxication. It can then be fake positive for HGN.