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blink reflex

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blink reflex
Etymology: ME, blenken + L, reflectere, to bend back
the automatic closure of the eyelid when an object is perceived to be rapidly approaching the eye.

blink
the involuntary movement of one or both eyelids of both eyes simultaneously. The frequency varies between species. Cats blink the least, with the possible exception of owls. In birds it is the lower eyelid which is moved up to meet the upper lid. In mammals the upper eyelid is moved down to meet the lower lid. The blink is a part of several reflexes including the palpebral, conjunctival and menace reflexes.

blink reflex
see blink response.
blink response
absent in lesions of the ophthalmic branch of the trigeminal nerve. Called also blink reflex.


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The MRI of the brain was normal, while the brainstem auditory-evoked response (BAER) and the blink reflex study were both consistent with left lower pontine infarction.
The blink reflex is brought about by eye movement and air movement around the eyes.
The blink reflex normally protects it, but when the eye is hurt it is called a corneal abrasion.
 
 
 
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