| RSD | reflex sympathetic dystrophy; relative standard deviation |
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| RSDS | reflex sympathetic dystrophy syndrome |
| SGR | Sachs-Georgi reaction; Shwartzman generalized reaction; skin galvanic reflex; submandibular gland re... |
| SLR | Shwartzman local reaction; single lens reflex; straight leg raising |
| SPAR | sensitivity prediction by acoustic reflex |
| reflex detrusor contraction | Normal coordinated function of the bladder with sustained contractions of the bladder matched by simultaneous relaxation of the sphincteric outlet mechanisms to empty the bladder. (05 Mar 2000) |
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| reflex dyspepsia | Functional dyspepsia excited by reflex irritation from disease elsewhere than in the stomach or intestines. (05 Mar 2000) |
| reflex epilepsy | Seizures which are induced by peripheral stimulation; e.g., audiogenic, laryngeal, photogenic, or other stimulation. Synonym: sensory precipitated epilepsy. (05 Mar 2000) |
| reflex headache | A headache secondary to another organic condition. Synonym: reflex headache. (05 Mar 2000) |
| reflex incontinence | In neurogenic disorders, loss of urine due to detrusor hyperreflexia and/or involuntary urethral relaxation in the absence of the desire to void. (05 Mar 2000) |
| reflex inhibition | A situation in which sensory stimuli decrease reflex activity. (05 Mar 2000) |
| reflex iridoplegia | Absence of the pupillary light reflex, as in the Argyll Robertson pupil. (05 Mar 2000) |
| reflex, let down | The let down reflex of the mother is an involuntary reflex during breastfeeding which causes the milk to flow freely. (12 Dec 1998) |
| reflex ligament | <anatomy> A triangular fibrous band extending from the aponeurosis of the external oblique to the pubic tubercle of the opposite side. See: aponeurosis of external abdominal oblique muscle. Synonym: ligamentum reflexum, Colles' ligament, fascia triangularis abdominis, reflex ligament, triangular fascia. (05 Mar 2000) |
| reflex movement | An involuntary movement resulting from a sensory stimulus. (05 Mar 2000) |
| reflex neurogenic bladder | An abnormal condition of bladder function whereby the bladder is cut off from upper motor neuron control, but where the lower motor neuron arc is still intact. (05 Mar 2000) |
| reflex, oculocardiac | Change of heartbeat induced by pressure on the eyeball, manipulation of extraocular muscles, or pressure upon the tissue remaining in the orbital apex after enucleation. (12 Dec 1998) |
| reflex otalgia | Pain referred to the ear from disease in another part, most commonly laryngeal, tonsillar, or nasopharyngeal. (05 Mar 2000) |
| reflex, pupillary | Constriction of the pupil in response to light stimulation of the retina. It refers also to any reflex involving the iris, with resultant alteration of the diameter of the pupil. (12 Dec 1998) |
| reflex sensation | referred sensation |