| quadriceps reflex | A sudden contraction of the anterior muscles of the thigh, caused by a smart tap on the patellar tendon while the leg hangs loosely at a right angle with the thigh. Synonym: knee jerk, knee phenomenon, knee reflex, knee-jerk reflex, patellar tendon reflex, quadriceps reflex. (05 Mar 2000) |
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| quadripedal extensor reflex | Extension of the arm of a hemiplegic patient when turned prone as if on all fours. Synonym: Brain's reflex. (05 Mar 2000) |
| innate reflex | An unlearned or instinctive reflex such as sucking, which is present at birth. (05 Mar 2000) |
| interscapular reflex | Contraction of the upper muscles of the back by stimulation between the scapulae. Synonym: interscapular reflex. (05 Mar 2000) |
| intrinsic reflex | A reflex muscular contraction elicited by the application of a stimulus, usually stretching, to the muscle itself as opposed to a muscular contraction caused by an extrinsic stimulus, e.g., skin, as in the abdominal skin reflex's. (05 Mar 2000) |
| inverted radial reflex | Flexion of the fingers without flexion of the forearm, on tapping the lower end of the radius; regarded as indicating a lesion of the fifth cervical segment of the spinal cord. (05 Mar 2000) |
| inverted reflex | Any reflex in which the usual response is reversed or does not conform to the pattern characteristic of the particular reflex. Synonym: inverted reflex. (05 Mar 2000) |
| investigatory reflex | An aspect of attending in which an organism's initial response to a change or to a novel stimulus is such that the organism becomes more sensitive to the stimulation; e.g., dilation of the pupil of the eye in response to dim light. Synonym: investigatory reflex, orienting response. (05 Mar 2000) |
| ipsilateral reflex | A reflex in which the response occurs on the side of the body that is stimulated. (05 Mar 2000) |
| oculocardiac reflex | A decrease in pulse rate associated with traction on extraocular muscles or compression of the eyeball; especially sensitive in children; may produce asystolic cardiac arrest. Synonym: Aschner's phenomenon, Aschner's reflex, Aschner-Dagnini reflex, oculovagal reflex. (05 Mar 2000) |
| oculocephalic reflex | Turning of the eyes and head toward the source of an auditory, visual, or other form of stimulation. Synonym: oculocephalic reflex. (05 Mar 2000) |
| oculocephalogyric reflex | Turning of the eyes and head toward the source of an auditory, visual, or other form of stimulation. Synonym: oculocephalic reflex. (05 Mar 2000) |
| oculovagal reflex | A decrease in pulse rate associated with traction on extraocular muscles or compression of the eyeball; especially sensitive in children; may produce asystolic cardiac arrest. Synonym: Aschner's phenomenon, Aschner's reflex, Aschner-Dagnini reflex, oculovagal reflex. (05 Mar 2000) |
| oesophagosalivary reflex | Salivation caused by irritation of the lower end of the oesophagus, as by carcinoma. Synonym: Roger's reflex. (05 Mar 2000) |
| olecranon reflex | Flexion of the forearm caused by tapping the olecranon. Synonym: paradoxical triceps reflex. (05 Mar 2000) |