| amnesia | <neurology> Lack or loss of memory, inability to remember past experiences. Origin: Gr. Amnesia = forgetfulness (05 Feb 1998) |
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| amnesia, retrograde | Amnesia for events that occurred before the onset of amnesia. (12 Dec 1998) |
| anterograde amnesia | Amnesia in reference to events occurring after the trauma or disease that caused the condition. (05 Mar 2000) |
| retrograde amnesia | Amnesia in reference to events that occurred before the trauma or disease that caused the condition. (05 Mar 2000) |
| posthypnotic amnesia | Selective forgetting, after a hypnotic state, of events occurring during hypnosis or of information stored in long-term memory, such as one's name, address, and names of relatives. (05 Mar 2000) |
| emotional amnesia | A numbness of feeling and emotion whose aetiology is psychological. (05 Mar 2000) |
| transient global amnesia | A memory disorder seen in middle aged and elderly persons characterised by an episode of amnesia and bewilderment which persists for several hours; during the episode the patient has a memory defect for present and recent past events, but is fully alert, oriented, capable of high-level intellectual activity, and has a normal neurological examination. Typically, these amnesic episodes occur spontaneously, and most patients experience only one; of uncertain aetiology-probably ischemic, but not due to atherosclerosis. (05 Mar 2000) |
| traumatic amnesia | The loss or disturbance of memory following an insult or injury to the brain of the type that accompanies a head injury, or excessive use of alcohol, or following the cessation of alcohol ingestion or other psychoactive drugs; or loss or disturbance of memory of the type seen in hysteria and other forms of dissociative disorders. (05 Mar 2000) |
| lacunar amnesia | Amnesia in reference to isolated events. (05 Mar 2000) |
| Merkel's tactile cell | A specialised tactile sensory nerve ending in the epidermis, characterised by a terminal cuplike expansion of an intraepidermal axon in contact with the base of a single modified keratinocyte. Synonym: meniscus tactus, Merkel's corpuscle, Merkel's tactile cell, Merkel's tactile disk, tactile disk. (05 Mar 2000) |
| Merkel's tactile disk | A specialised tactile sensory nerve ending in the epidermis, characterised by a terminal cuplike expansion of an intraepidermal axon in contact with the base of a single modified keratinocyte. Synonym: meniscus tactus, Merkel's corpuscle, Merkel's tactile cell, Merkel's tactile disk, tactile disk. (05 Mar 2000) |
| tactile | Of or pertaining to the organs, or the sense, of touch; perceiving, or perceptible, by the touch; capable of being touched; as, tactile corpuscles; tactile sensations. "Tactile sweets." . "Tactile qualities." . <physiology> Tactile sense, the sense of touch, or pressure sense. See Touch. "The delicacy of the tactile sense varies on different parts of the skin; it is geatest on the forehead, temples and back of the forearm." (H. N. Martin) Origin: L. Tactilis, fr. Tangere, tactum, to touch: cf. F. Tactile. Source: Websters Dictionary (01 Mar 1998) |
| tactile agnosia | The inability to recognise objects by touch, in the presence of intact cutaneous and proprioceptive hand sensation; caused by lesion in the contralateral parietal lobe. Synonym: astereognosis, stereoagnosis, stereoanesthesia. (05 Mar 2000) |
| tactile anaesthesia | Loss or impairment of the sense of touch. (05 Mar 2000) |
| tactile cell | One of the epithelioid cell's of a corpusculum tactus. Synonym: touch cell. (05 Mar 2000) |