reflex changes in the eyes that enable an object to be focused on the retina

extension upward of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front; normal in infants under the age of two years but a sign of brain or spinal cord injury in older persons

a reflex that expels gas noisily from the stomach through the mouth

a reflex that closes and opens the eyes rapidly

sudden reddening of the face (as from embarrassment or guilt or shame or modesty)

the reflex act of ejecting the contents of the stomach through the mouth

normal response to the presence of feces in the rectum

an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom

a reflex response to the passage of electric current through the body

a spasmodic reflex of the throat made as if in swallowing

a reflex extension of the leg resulting from a sharp tap on the patellar tendon

reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller

reflex pupillary dilation as a muscle pulls the iris outward; occurs in response to a decrease in light or certain drugs

relaxation of the urethral sphincter in response to increased pressure in the bladder

normal reflex consisting of retching; may be produced by touching the soft palate in the back of the mouth

reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation

flexion of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front in persons over the age of 2 years; under 2 years the results should be extension of the toes (Babinski reflex)

reflex consisting of head-turning and sucking movements elicited in a normal infant by gently stroking the side of the mouth or cheek

a sudden involuntary movement

reflex contraction of a muscle when an attached tendon is pulled; important in maintaining erect posture

reflex behavior in newborn mammals; includes finding and grasping the nipple in the mouth and sucking on it and swallowing the milk

a reflex motion caused by cold or fear or excitement

a symptom consisting of the involuntary expulsion of air from the nose

(usually plural) the state of having reflex spasms of the diaphragm accompanied by a rapid closure of the glottis producing an audible sound; sometimes a symptom of indigestion

regurgitation of small amounts of food; seen in some infants after feeding

vomiting blood

severe and excessive vomiting

yawning and stretching (as when first waking up)

a complicated involuntary reaction to a sudden unexpected stimulus (especially a loud noise); involves flexion of most skeletal muscles and a variety of visceral reactions

a normal reflex of young infants; a sudden loud noise causes the child to stretch out the arms and flex the legs

a reflex response to sudden pain

repeated blinking or winking (especially if uncontrolled and persistent)