oscillopsia

oscillopsia
   Also known as bouncing vision. The term oscil-lopsia comes from the Latin verb oscillare (to rock, to swing) and the Greek verb opsis (seeing). It is used to denote a visual distortion in which the extracorporeal environment as a whole appears to oscillate. Depending on the amplitude of the oscillation, it may present as a mild blurring of vision or as an instable, jerky type of vision in which the extracorporeal environment would seem to swing, to move back and forth, or to wiggle. Vertical oscillopsia is characterized by oscillations in the vertical plane co-occurring with up- and downward movement of the head (as in locomotion) or with vertical nystagmus. Two other types of oscillopsia, i.e. horizontal and rotational oscillopsia, are associated primarily with nystagmus. The occurrence of oscillopsia is normally prevented by central cancellation, a process in which the vestibulo-ocular response plays an important role. Pathophysio-logically, oscillopsia is attributed to 'retinal slip', i.e. an excessive slip of images on the retina, due to failure of the vestibulo-ocular response, as may occur in the context of conditions such as superior canal dehiscence syndrome, multiple sclerosis, and intoxication with gentamicin. Oscillopsia affects the whole field of vision and should not be confused with the "autokinetic effect.
   References
   Deutschländer, A., Strupp, M., Jahn, K., Jäger, L., Quiring, F., Brandt, T. (2004). Vertical oscillopsia in bilateral superior canal dehis-cence syndrome. Neurology, 62, 784-787. Rushton, D., Cox, N. (1987). A new optical treatment for oscillopsia. Journal ofNeurology, Neurosurgery and Psychiatry, 50, 411-415.

Dictionary of Hallucinations. . 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • 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. Oscillopsia may be caused by loss of the vestibulo ocular reflex,… …   Wikipedia

  • oscillopsia — The subjective sensation of oscillation of objects viewed. SYN: oscillating vision. [L. oscillo, to swing, + G. opsis, vision] * * * os·cil·lop·sia läp sē ə n a visual disturbance in which objects appear to oscillate * * * os·cil·lop·sia… …   Medical dictionary

  • oscillating vision — oscillopsia …   Medical dictionary

  • Superior canal dehiscence syndrome — DiseaseDisorder infobox Name = PAGENAME ICD10 = ICD9 = ICD9|386.43 ICDO = Caption = OMIM = MedlinePlus = eMedicineSubj = ent eMedicineTopic = 793 DiseasesDB = Superior canal dehiscence syndrome (SCDS) is a rare medical condition of the inner ear …   Wikipedia

  • vestibulopathy — Any abnormality of the vestibular apparatus, e.g., Ménière disease. idiopathic bilateral v. slowly progressive disorder affecting young to middle aged adults, manifested as gait unsteadiness (especially when visual cues are absent) and …   Medical dictionary

  • Superior canal dehiscence — Classification and external resources ICD 9 386.43 eMedicine ent/793 Superior canal dehiscence syndrome (S …   Wikipedia

  • Antiphospholipid syndrome — Classification and external resources Micrograph showing an advanced thrombotic microangiopathy, as may be seen in ALPA syndrome. Kidney biopsy. PAS stain …   Wikipedia

  • Toxidrome — In medicine, a toxidrome (portmanteau of toxic and syndrome) is a syndrome caused by a dangerous level of toxins in the body. Common symptoms include dizziness, disorientation, nausea, vomiting, and oscillopsia. A toxidrome may indicate a medical …   Wikipedia

  • Sensory substitution — means to transform the characteristics of one sensory modality into stimuli of another sensory modality. It is hoped that sensory substitution systems can help handicapped people by restoring their ability to perceive a certain defective sensory… …   Wikipedia

  • Treatment of multiple sclerosis — Several therapies for multiple sclerosis (MS) exist, although there is no known cure. Multiple sclerosis is a chronic inflammatory demyelinating disease that affects the central nervous system (CNS). The most common initial course of the disease… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”