Patient with Lateral (Horizontal) Canal BPPV may feel dizzy when turning their heads from side to side or when tilting their head down or up. Lateral (Horizontal) canal BPPV often occurs after the Epley manoeuvre (see below). In rare cases other canals may be affected. In Posterior Canal BPPV patient experience vertigo/spinning dizziness when their head is tilted (i.e when looking up or down, lying down flat or getting up from lying down flat or if they rollover in bed). In most cases of BPPV the problems is in the posterior canal. These pickup rotational movement of the head and send signals via the brain to the eye muscles to keep the eyes on a target while the head is moving. The inner ear has 3 Semi-circular canals (posterior, lateral (also known as horizontal) and super (also known as anterior) canal. A simple test called the Dix Hall Pike manoeuvre can detect active BPPV. Other conditions such as migraine associated vertigo can cause a similar problem. Most patients have periods of spontaneous improvement and deterioration. It is important to realise that this type of dizziness (know as benign paroxysmal positional vertigo (BPPV)) is not a serious problem and can usually be treated fairly easily. Most people however, try to avoid any position which may bring the dizziness on. If you keep your head in the position that brings on the dizziness and keep it there the spinning sensation disappears within 30 seconds (although the nausea may last longer). Usually one side is worse than the other. Turning in bed, lying back, getting out of bed or looking up or down (with head tilt) can bring on the dizzy spells. This causes intense dizziness and can lead to nausea and occasionally vomiting. The nerve fibres send signals to the brain and the eye telling them that your head is spinning when it is not. Certain head position will then cause movement of the calcium crystals and result in stimulation of nerve fibres. This can happen with no apparent reason or follow a head injury or viral inner ear infection (viral labyrinthitis). Occasionally calcium carbonate crystals which have broken loose from one part of the inner ear, settle on or near nerve fibers which detect spinning movement within the balance part of the inner ear (semi circular canals). The inner ear is involved in control of balance and hearing. Benign Paroxysmal Positional Vertigo (BPPV) What is Benign Paroxysmal Positional Vertigo?
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