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Oscillopsia is a visual disturbance in which objects in the visual field appear to oscillate. The severity of the effect may range from a mild blurring to rapid and periodic jumping. [ 1] Oscillopsia is an incapacitating condition experienced by many patients with neurological disorders. [ 2] It may be the result of ocular instability occurring ...
Episodic ataxia ( EA) is an autosomal dominant disorder characterized by sporadic bouts of ataxia (severe discoordination) with or without myokymia (continuous muscle movement). There are seven types recognized but the majority are due to two recognized entities. [ 1] Ataxia can be provoked by psychological stress or startle, or heavy exertion ...
Friedreich's ataxia. Friedreich's ataxia ( FRDA or FA) is an autosomal-recessive genetic disease that causes difficulty walking, a loss of coordination in the arms and legs, and impaired speech that worsens over time. Symptoms generally start between 5 and 20 years of age.
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]
Nystagmus. Nystagmus is a condition of involuntary (or voluntary, in some cases) [ 1] eye movement. [ 2] People can be born with it but more commonly acquire it in infancy or later in life. In many cases it may result in reduced or limited vision. [ 3] In normal eyesight, while the head rotates about an axis, distant visual images are sustained ...
Treatment. Immunotherapy. [ 2] Bickerstaff brainstem encephalitis is a rare inflammatory disorder of the central nervous system, [ 3] first described by Edwin Bickerstaff in 1951. [ 4][ 5] It may also affect the peripheral nervous system, and has features in common with both Miller Fisher syndrome and Guillain–Barré syndrome.
Chédiak–Higashi syndrome. Chédiak–Higashi syndrome[ 1] ( CHS) is a rare autosomal recessive disorder that arises from a mutation of a lysosomal trafficking regulator protein, [ 2] which leads to a decrease in phagocytosis. The decrease in phagocytosis results in recurrent pyogenic infections, albinism, and peripheral neuropathy .
Portosystemic shunt (PSS) — also known as a liver shunt — in dogs is a medical condition that affects the normal flow of blood through the liver. Under typical circumstances, blood from the ...