extrapyramidal dyskinesias |
Abnormal involuntary movements attributed to pathological states of one or more parts of the striate body and characterised by insuppressible, stereotyped, automatic movements that cease only during sleep; e.g., Parkinson's disease; chorea; athetosis; hemiballism. (05 Mar 2000) |
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extrapyramidal effect |
A combination of neurologic effects which includes tremors, chorea, athetosis and dystonia. A common side effect of neuroleptic agents (phenothiazines). Other medications known to cause these reactions include haloperidol, molindone, perphenazine & amitriptyline, loxapine, pimozide and rarely, benzodiazepines. (27 Sep 1997) |
extrapyramidal motor system |
Literally: all of the brain structures affecting bodily (somatic) movement, excluding the motor neurons, the motor cortex, and the pyramidal (corticobulbar and corticospinal) tract. Despite its very wide literal connotation, the term is commonly used to denote in particular the striate body (basal ganglia), its associated structures (substantia nigra; subthalamic nucleus), and its descending connections with the midbrain. (05 Mar 2000) |
extrapyramidal motor system disease |
A general term for a number of disorders caused by abnormalities of the basal ganglia or certain brain stem or thalamic nuclei; characterised by motor deficits, loss of postural reflexes, bradykinesia, tremor, rigidity, and various involuntary movements. Synonym: extrapyramidal motor system disease. (05 Mar 2000) |
extrapyramidal syndrome |
<syndrome> Abnormalities of movement related to injury of motor pathways other than the pyramidal tract. (05 Mar 2000) |
extrarenal |
Outside of the kidney. (18 Nov 1997) |
extrasaccular hernia |
A hernia in which an abdominal viscus forms part of the sac. Synonym: extrasaccular hernia, parasaccular hernia, slipped hernia. (05 Mar 2000) |
extrasensory |
Outside or beyond the ordinary senses; not limited to the senses, as in extrasensory perception. (05 Mar 2000) |
extrasensory perception |
Perception by means other than through the ordinary senses; e.g., telepathy, clairvoyance, precognition. (05 Mar 2000) |
extrasensory thought transference |
The knowledge or communication by one person with the mental processes of another through channels other than known physical or perceptual processes. (12 Dec 1998) |
extraserous |
Outside a serous cavity. (05 Mar 2000) |
extraskeletal chondroma |
<tumour> A chondroma located in soft tissues, usually of the fingers, hands, and feet, not connected to underlying bone or periosteum. (05 Mar 2000) |
extrasomatic |
Outside of, or unrelated to, the body. (05 Mar 2000) |
extrastapedial |
<anatomy> Pertaining to a part of the columella of the ear, which, in many animals, projects beyond the connection with the stapes. The extrastapedial part of columella. Source: Websters Dictionary (01 Mar 1998) |
extrasystole |
A premature contraction of the heart that is independent of the normal rhythm and arises in response to an impulse in some part of the heart other than the sinoatrial node. Synonym: premature beat. (18 Nov 1997) |