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Benign paroxysmal positional vertigo (BPPV) is a disorder arising from a problem in the inner ear. [3] Symptoms are repeated, brief periods of vertigo with movement, characterized by a spinning sensation upon changes in the position of the head. [1] This can occur with turning in bed or changing position. [3]
Vestibular dysfunction can exist unilaterally, affecting only one side of the body, or bilaterally, affecting both sides. [2] The most commonly known vestibular disorder is called Benign Paroxysmal Positional Vertigo (BPPV). The BPPV is characterized by a temporary dizzy feeling associated with blurred vision in relation to certain head positions.
Hemiballismus or hemiballism is a basal ganglia syndrome resulting from damage to the subthalamic nucleus in the basal ganglia. [1] It is a rare hyperkinetic movement disorder, [2] that is characterized by pronounced involuntary limb movements [1] [3] on one side of the body [4] and can cause significant disability. [5]
In lower animals, the organs that coordinate balance and movement are not independent from eye movement. A fish, for instance, moves its eyes by reflex when its tail is moved. Humans have semicircular canals, neck muscle "stretch" receptors, and the utricle (gravity organ). Though the semicircular canals cause most of the reflexes which are ...
Benign paroxysmal positional vertigo, or BPPV, is a disorder caused by the breaking off of a piece of otoconia from the otoliths. The otoconia floats freely in the inner ear fluid, causing disorientation and vertigo. [1] The disorder can be tested for using a nystagmus test, such as the Dix-Hallpike maneuver. This disorder can disrupt the ...
The signs of vertiginous epilepsy often occur without a change in the subject’s consciousness so that they are still aware while experiencing the symptoms. [2] It is often described as a sudden onset of feeling like one is turning in one direction, typically lasting several seconds. [2]
However, both mulesing and tail-docking have received criticism from animal welfare groups, who say the mitigative procedures are excessive and can have other negative effects. [ 32 ] In addition to blowfly strike in sheep, myiasis from screwworm flies ( Cochliomyia hominivorax in particular) regularly cause upwards of US$100 million in annual ...
Examples can be found in bacteria, protozoa, viruses, and animals. Parasites may also alter the host behavior to increase protection of the parasites or their offspring; the term bodyguard manipulation is used for such mechanisms. [5] Among the behavioral changes caused by parasites is carelessness, making their hosts easier prey.