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Oculocardiac reflex can be profound during eye examination for retinopathy of prematurity. [5] However, this reflex may also occur with adults. Bradycardia, junctional rhythm and asystole, all of which may be life-threatening, [6] can be induced through this reflex. This reflex has been seen to occur during many pan facial trauma surgeries due ...
In medicine, the caloric reflex test (sometimes termed ' vestibular caloric stimulation ') is a test of the vestibulo-ocular reflex that involves irrigating cold or warm water or air into the external auditory canal. This method was developed by Robert Bárány, who won a Nobel Prize in 1914 for this discovery.
Knee jerk or patellar reflex — a kick caused by striking the patellar tendon with a tendon hammer just below the patella, stimulating the L4 and L3 reflex arcs. Moro reflex, a primitive reflex— only in all infants up to 4 or 5 months of age: a sudden symmetric spreading of the arms, then unspreading and crying, caused by an unexpected loud ...
Reflexes include pupillary response (fixed pupils), oculocephalic reflex, corneal reflex, no response to the caloric reflex test, and no spontaneous respirations. Brain death can sometimes be difficult to differentiate from other medical states such as barbiturate overdose , acute alcohol poisoning , sedative overdose, hypothermia ...
A reflex hammer is used for this testing. "2+ symmetric, downgoing plantar reflex" Sensation: Sensory system testing involves provoking sensations of fine touch, pain and temperature. Fine touch can be evaluated with a monofilament test, touching various dermatomes with a nylon monofilament to detect any subjective absence of touch perception ...
Oculocephalic reflex, also known as the doll's eye, is performed to assess the integrity of the brainstem. Patient's eyelids are gently elevated and the cornea is visualized. The patient's head is then moved to the patient's left, to observe whether the eyes stay or deviate toward the patient's right; same maneuver is attempted on the opposite ...
Gaze palsies secondary to frontal lobe lesions can be temporarily relieved with rapid, passive horizontal head rotation, which also directly stimulates the sixth nerve nucleus through the vestibuloocular reflex. During this maneuver in a patient with intact brainstem structures, the eyes will gaze to the opposite direction of the head movement.
Bell's phenomenon is a normal defense reflex present in about 75% of the population, resulting in elevation of the globes when blinking or when threatened (e.g. when an attempt is made to touch a patient's cornea).