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Corneal reflex print that page

The corneal reflex , also known as the blink reflex , is an involuntary blinking of the eyelids elicited by stimulation of the cornea (such as by touching or by a foreign body), or bright light, though could result from any peripheral stimulus. Stimulation should elicit both a direct

wikipedia.org | 2011/8/12 3:52:38

Hirschberg test print that page


In the fields of optometry and ophthalmology , the Hirschberg test , also Hirschberg corneal reflex test , is a screening test that can be used to assess whether a person has strabismus (ocular misalignment). A photographic version of the Hirschberg is used to quantify strabismus. [ 1

Pupillary light reflex print that page

The pupillary light reflex is a reflex that controls the diameter of the pupil , in response to the intensity ( luminance ) of light that falls on the retina of the eye , thereby assisting in adaptation to various levels of darkness and light, in addition to retinal sensitivity. Greater

wikipedia.org | 2011/9/13 10:56:59

Photic sneeze reflex print that page

The photic sneeze reflex (colloquially known as "sun sneezing") is a condition of uncontrollable sneezing in response to numerous stimuli, such as looking at bright lights or periocular injection. The condition affects 18–35% of the population, and its exact mechanism of action is not

wikipedia.org | 2011/9/26 4:18:39

Corneal abrasion print that page


brittle and easily damaged by movement across the surface. [ edit ] Symptoms and signs Symptoms of corneal abrasion include pain, photophobia , a foreign-body sensation, excessive squinting, and a reflex production of tears . Signs include epithelial defects and edema , and often conjunctival

Triceps reflex print that page

The triceps reflex , a deep tendon reflex , is a reflex as it elicits involuntary contraction of the triceps brachii muscle . It is initiated by the Cervical (of the neck region) spinal nerve 7 nerve root (the small segment of the nerve that emerges from the spinal cord). [ 1 ] The

wikipedia.org | 2010/9/26 17:42:27

Withdrawal reflex print that page

The nociceptive withdrawal reflex (NWR) is a spinal reflex intended to protect the body from damaging stimuli. The classic example is when a person touches something hot and withdraws their hand from the hot object. The heat stimulates temperature and pain receptors in the skin, triggering

wikipedia.org | 2010/9/25 10:32:33

Corneal ulcers in animals print that page


A corneal ulcer , or ulcerative keratitis , is an inflammatory condition of the cornea involving loss of its outer layer. It is very common in dogs and is sometimes seen in cats . In veterinary medicine , the term corneal ulcer is a generic name for any condition involving the loss of

Jaw jerk reflex print that page

The jaw jerk reflex or the masseter reflex is a reflex used to test the status of a patient's trigeminal nerve (CN V). [ 1 ] The mandible —or lower jaw—is tapped at a downward angle just below the lips at the chin while the mouth is held slightly open. In response, the masseter

wikipedia.org | 2010/9/25 17:31:34

Accommodation reflex print that page


The accommodation reflex is a reflex action of the eye , in response to focusing on a near object, then looking at distant object (and vice versa), comprising coordinated changes in vergence , lens shape and pupil size. It is dependent on cranial nerve II ( afferent limb of reflex