HALLUCINATION

n. Haa 1n-a's hu3n. Gr., dAjj. Lat., l-lu;'-si alucinatio, hallucinatio (from alucinari, to wander in mind). Fr., h. Ger., Sinnestciuschtmg. It., allucinazione. Sp., alucinaciun. An erroneous mental or sensory impre ion which is considered as the product of direct perception without any external object actually existing to give rise to the impre ion. [D, 21.] Bilateral h's. Fr., /r bilaterales. H's of different character in the two cerebral hemispheres (e. g., one ear hearing pleasant and the other disagreeable sounds, [o, 34.] Divided h. See Unilateral h. Gehorsh'en (Ger.), H's auditives (Ft.). See Hearing h's. H's d6doubles (Fr.). Of Micha, h's in respect to both sight and sound. [Sander (A, 319 [o, 21]).] H. de la vue (Fr.). An h. in respect to sight or things seen. [D, 5.] H. de 1'odor at (Fr.). An h. in regard to smell. [D.] H's de 1'oule (Fr.). See Hearing A's. H's du gout. An h. of taste. H. du tact (Fr.). An h. of touch. [L, 88.] H. hypnagogique (Fr.). See Hypnagogic h. H. panoramiqiie (Fr.). A form of h. in which the subject fancies an immense map is spread out before him on which his memory or his imagination enables him to recognize whole countries or smaller districts. [Vercoutre, "Rec. de med. et de ehir. mil it a ires," Jan., Feb., 1881; " Union med.," May 16, 1882, p. 802.] Hearing h's. Fr., A's de. raudition, h's auditives. Ger., Sin nest a usc hung des Gehors* Oehorsh'en. It., allucinazioni deW audi to. Sp.,alucinaciones del oido. Imaginary sounds heard as coming from the external world, and as distinct from subjective noises or sensations. [F.] Hypnagogic h. Fr., h. hypnagogique. An h. that occurs in an intermediate state between sleeping and waking, [""i 84.]- -Hypnotic h. An h. in a person under hypnotic influence, suggested by the hypnotizer. [a, 34.] Insane h. An h. of such a character that in itself it evinces unsoundne of mind (e. g.. the idea that one is being pursued by thieves or murderers when' there is no foundation in fact for such an idea). [D, 43.] Muscular h. Fr., h. musculaire. An h. of taking muscular exercise, somrtimrs a ociated with great fatigue, fa, 34.] Negative h. Fr., h. /// gge>tMi h. In a hypnotized subject, an h. that is suggested by the hypnotizer. [a, 34.] Unilateral h. Ger.. ' Illitston. An h. that is perceived by one visual or auditory centre only. [W. A. Hammond, "N. Y. Med. Jour.," Dec. 12, 1885, p. 649 (a, 34).] [s. 280]