phenom'enon, pi. phenom'ena

[G, phainomenon; phainomai, I appear.] i A symptom an occurrence of any sort, whether ordinary or extraordinary, in relation to a disease. 2. Any unusual fact or occurrence, arm p., Pool's* phenomenon (2). Bordet-Gengou p., Nei er-Wechsberg p., Pfeiffer's p., etc., see the proper names. di'aphragm p., see under diaphragm, facia'lis p., light rubbing of the skin or a tap on. the zygoma causes a quick contraction of the lip and ala nas i; sometimes percu ion above the zygoma causes contraction of the lip only; observed in tetany and sometimes in exophthalmic goiter. finger p., extension and abduction of the fingers when the arm is raised in cases of slight partial hemiplegia, hip-flex'ion p., when a hemiplegic attempts to raise himself from a lying posture he first flexes the hip on the paralyzed side, and the same movement takes place when he lies down again, hip p., Joffroy's reflex, twitching of the glutei muscles when firm pre ure is made on the nates in cases of spastic paralysis, knee p., patellar tendon reflex.* leg p.. Pool's* phenomenon (i). orbicula'ris p., paradoxical pupil p. palmoplan'tar p., Filipowicz's* symptom. I paradoz'ical di'aphragm p., see under diaphragm. paradoz'ical pu'pil p., contraction followed by dilatation of the pupil upon forcible closure of the eyelids, or upon the attempt to close them while they are held apart, phrenic p., see under diaphragm, ra'dial p., dorsal flexion of the hand occurring involuntarily with palmar flexion of the fingers, tib'ial p., Striimpell's sign, dorsal flexion of.the foot occurring involuntarily in a paralyzed limb when the thigh is drawn up on the body, toe p., (i) involuntary hyperextension of the great toe when the thigh is (2)