| RR | radiation reaction; radiation response; rate ratio; rational recovery [group]; recovery room; relati... |
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| RRI | recurrent respiratory infection; reflex relaxation index; relative response index |
| RSD | reflex sympathetic dystrophy; relative standard deviation |
| RSDS | reflex sympathetic dystrophy syndrome |
| SGR | Sachs-Georgi reaction; Shwartzman generalized reaction; skin galvanic reflex; submandibular gland re... |
radioisotope vesicoureteral reflex test
| Mendel's instep reflex | The foot being firmly supported on its inner side, a sharp tap on the dorsal tendons causes extension of the second to the fifth toes. Synonym: back of foot reflex, dorsum of foot reflex. (05 Mar 2000) |
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| Chaddock reflex | <clinical sign> When the external malleolar skin area is irritated, extension of the great toe occurs in cases of organic disease of the corticospinal reflex paths. Synonym: Chaddock reflex, external malleolar sign. (05 Mar 2000) |
| chain reflex | A series of reflexs, each serving as a stimulus for the next. (05 Mar 2000) |
| Perez reflex | Running a finger down the spine of an infant held supported in a prone position will normally cause the whole body to become extended. (05 Mar 2000) |
| Gordon reflex | Dorsal flexion of the great toe produced by firm lateral pressure on the calf muscles. Synonym: paradoxical flexor reflex. (05 Mar 2000) |
| pericardial reflex | A vagal reflex seen during operations involving pericardial manipulation; characterised by signs of vagal stimulation (bradycardia and arterial hypotension). (05 Mar 2000) |
| grasping reflex | An involuntary flexion of the fingers to tactile or tendon stimulation on the palm of the hand, producing an uncontrollable grasp; usually associated with frontal lobe lesions. Compare: darwinian reflex. Synonym: forced grasping reflex, grasp reflex. (05 Mar 2000) |
| periosteal reflex | A muscular contraction in the arm following a tap on the radius or ulna. (05 Mar 2000) |
| grasp reflex | An involuntary flexion of the fingers to tactile or tendon stimulation on the palm of the hand, producing an uncontrollable grasp; usually associated with frontal lobe lesions. Compare: darwinian reflex. Synonym: forced grasping reflex, grasp reflex. (05 Mar 2000) |
| chin reflex | A spasmodic contraction of the temporal muscles following a downward tap on the loosely hanging mandible. Synonym: chin jerk, chin reflex, jaw jerk, mandibular reflex, masseter reflex. (05 Mar 2000) |
| great-toe reflex | <clinical sign> Extension of the great toe and abduction of the other toes instead of the normal flexion reflex to plantar stimulation, considered indicative of pyramidal tract involvement ("positive" Babinski). Synonym: Babinski reflex, Babinski's phenomenon, great-toe reflex, paradoxical extensor reflex, toe phenomenon. (05 Mar 2000) |
| metacarpohypothenar reflex | Flexion of the little finger on tapping the dorsum of the hand; seen in pyramidal tract lesions and is similar to Starling's reflex. (05 Mar 2000) |
| metacarpothenar reflex | Flexion of the thumb upon tapping the dorsum of the hand. Synonym: metacarpothenar reflex. (05 Mar 2000) |
| Chodzko's reflex | Contractions of several muscles of the shoulder girdle and arm when the manubrium sterni is percussed. (05 Mar 2000) |
| metatarsal reflex | Flexion of the toes on tapping over the cuboid bone; almost identical with Guillain-Barre reflex, and fundamentally similar to Rossolimo's reflex. Synonym: metatarsal reflex. (05 Mar 2000) |