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  2. Positional alcohol nystagmus - Wikipedia

    en.wikipedia.org/wiki/Positional_Alcohol_Nystagmus

    Positional alcohol nystagmus. Positional alcohol nystagmus (PAN) is nystagmus (visible jerkiness in eye movement) produced when the head is placed in a sideways position. PAN occurs when the specific gravity of the membrane space of the semicircular canals in the ear differs from the specific gravity of the fluid in the canals because of the ...

  3. Benign paroxysmal positional vertigo - Wikipedia

    en.wikipedia.org/wiki/Benign_paroxysmal...

    Exterior of labyrinth of the inner ear. 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 ...

  4. Nystagmus - Wikipedia

    en.wikipedia.org/wiki/Nystagmus

    Nystagmus can be clinically investigated by using a number of non-invasive standard tests. The simplest one is the caloric reflex test, in which one ear canal is irrigated with warm or cold water or air. The temperature gradient provokes the stimulation of the horizontal semicircular canal and the consequent nystagmus.

  5. Caloric reflex test - Wikipedia

    en.wikipedia.org/wiki/Caloric_reflex_test

    The eyes then turn toward the ipsilateral ear, with horizontal nystagmus to the contralateral ear. [5] [6] Absent reactive eye movement suggests vestibular weakness of the horizontal semicircular canal of the side being stimulated. In comatose patients with cerebral damage, the fast phase of nystagmus will be absent as this is controlled by the ...

  6. Superior canal dehiscence syndrome - Wikipedia

    en.wikipedia.org/wiki/Superior_canal_dehiscence...

    The semicircular canal dehiscence ( SCD) is a category of rare neurotological diseases/disorders affecting the inner ears, which gathers the superior SCD, lateral SCD and posterior SCD. These SCDs induce SCD syndromes (SCDSs), which define specific sets of hearing and balance symptoms. [ 1][ 2] This entry mainly deals with the superior SCDS.

  7. Stenosis - Wikipedia

    en.wikipedia.org/wiki/Stenosis

    Stenoses. CT scan of a bronchial stenosis (arrow) that resulted from tracheobronchial injury. Pronunciation. / stəˈnoʊsɪs / [ 1][ 2] Stenosis (from Ancient Greek στενός (stenós) 'narrow') is the abnormal narrowing of a blood vessel or other tubular organ or structure such as foramina and canals. It is also sometimes called a ...

  8. Neurogenic claudication - Wikipedia

    en.wikipedia.org/wiki/Neurogenic_claudication

    Neurogenic claudication ( NC ), also known as pseudoclaudication, is the most common symptom of lumbar spinal stenosis (LSS) and describes intermittent leg pain from impingement of the nerves emanating from the spinal cord. [ 1][ 2] Neurogenic means that the problem originates within the nervous system. Claudication, from Latin claudicare 'to ...

  9. Lumbar spinal stenosis - Wikipedia

    en.wikipedia.org/wiki/Lumbar_spinal_stenosis

    Lumbar spinal stenosis can cause pain in the low back or buttocks, abnormal sensations, and the absence of sensation (numbness) in the legs, thighs, feet, or buttocks, or loss of bladder and bowel control. The precise cause of LSS is unclear. Narrowing of spinal structures in the spinal cord such as the central canal, the lateral recesses, or ...

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