Vestibulo–ocular reflex
Vestibulo–ocular reflex (pronunciation: ves-tib-yoo-loh-OK-yoo-lar ree-fleks) is a neurological mechanism that stabilizes gaze during head movement. It produces an eye movement that counteracts head movement, thus maintaining a stable image on the retina.
Etymology
The term "Vestibulo–ocular reflex" is derived from the Latin words vestibulum which means entrance, and ocularis which means of the eye. The term reflex is derived from the Latin reflexus, meaning a bending back.
Function
The Vestibulo–ocular reflex is a reflex action of the eye and inner ear in response to rotational movement of the head. It involves the vestibular system, the part of the inner ear responsible for balance, and the oculomotor system, which controls eye movement. The reflex helps to stabilize images on the retina during head movement by producing eye movements in the direction opposite to head movement.
Related Terms
- Vestibular system: The sensory system that contributes to balance and sense of spatial orientation.
- Oculomotor system: The system that controls the movement of the eyes.
- Reflex action: An involuntary and nearly instantaneous movement in response to a stimulus.
- Retina: The light-sensitive layer of tissue at the back of the inner eye.
See Also
External links
- Medical encyclopedia article on Vestibulo–ocular reflex
- Wikipedia's article - Vestibulo–ocular reflex
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