Benign Paroxismal Positional Vertigo
This condition alone accounts for more than approximately 15% of all the cases reported with vertigo. As the name suggests, The patient complains of paroxysms (episodes) of vertiginous bouts especially on the movement of head eg. while getting up from bed, turning or bending the neck sideways, etc. The intensity of vertiginous bout is normally short and sudden and often frequent or intermittent.
Mechanism & Cause
Before we talk about the cause, let us brush up with brief understanding of the inner ear. Primarily, the inner ear consists of cochlea and semi-circular canals that are connected to fluid filled vestibule. The cochlea is concerned with hearing whereas semi-circular canals are responsible for maintaining the balance and posture of the body. During head movements, the fluid in the canals move the fine hair present within which in turn stimulates the sensory (vestibular) nerve. This way, brain receives the information about the position of head with respect to body.
Thus, The vestibular labyrinth of the inner ear contains fluid filled semi-circular canals that monitor the position of the head and help us in maintaining balance. Small particles of calcium carbonates referred to as Otoliths or otoconia are normally present in utricle of the inner ear that get disloged sometimes and float in the vestibular fluid as debris. Post dislodgement these otoliths are referred to as canaliths.
In BPPV, the canaliths enter into the semi-circular canals (mostly posterior) and move during the head movement, causing stimulation of the hair that signal the brain. But the information received by brain from the other ear is not the same and this imbalance of information received causes vertigo. The bout of vertigo is often due to movement, short lasting and intense.
The cause for the dislodgement may be degenerative changes, infections of the inner ear, direct blows around the ear, head injuries, etc.
Signs & Symptoms
Nausea & Dizziness
Vertigo
Loss of balance
Nystagmus
Light headedness
Treatment
Normally, the condition remains benign and is not serious but frequent and intense bouts are a great source of disturbance. The treatment aims at repositioning the canaliths at some ‘safe place’ where they do not move and stimulate the fine hair within the inner ear. One of the commonly performed is Epley’s manoeuvre by the physician and this manoeuvre requires a series of patient’s head movements performed by the physician.
Many are also of the belief that BPPV recovers on it’s own in case we do not treat the patient. It is believed that the otoconia or canaliths are absorbed in due course of time or get repositioned themselves.
In case nothing works, surgical plugging of the affected part of ear is an option using bone plug. The success rate again here is not 100%.
Cawthrone cooksey exercises in any case helps patients with BPPV.
Param is the administrator of PhysioErgo [http://physioergo.com/] – an informal, informational and community website for Physical Therapists

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