| ASA | acetylsalicylic acid; active systemic anaphylaxis; Adams-Stokes attack; American Society of Anesthes... |
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| ASH | aldosterone-stimulating hormone; American Society of Hematology; alkylosing spinal hyperostosis; ant... |
| ASIA | American Spinal Injury Association |
| ASP | abnormal spinal posture; acute symmetric polyarthritis; African swine pox; aged substrate plasma; al... |
| ASS | acute serum sickness; acute spinal stenosis; anterior superior spine; argininosuccinate synthetase |
| hereditary spinal ataxia | Sclerosis of the posterior and lateral columns of the spinal cord, occurring in children and marked by ataxia in the lower extremities, extending to the upper, followed by paralysis and contractures; autosomal recessive inheritance. See: spinocerebellar ataxia. Synonym: Friedreich's ataxia, heredotaxia. (05 Mar 2000) |
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| high spinal anaesthesia | Spinal anaesthesia in which the level of sensory denervation extends to the second or third thoracic dermatome. (05 Mar 2000) |
| hyperbaric spinal anaesthesia | Spinal anaesthesia in which spread of local anaesthetic solution in the subarachnoid space is controlled by adjusting the position of the patient when the density of local anaesthetic is made greater than the density of cerebrospinal fluid (i.e., hyperbaric) by the addition of glucose. (05 Mar 2000) |
| hypobaric spinal anaesthesia | <anaesthetics> Spinal anaesthesia in which spread of local anaesthetic solution in the subarachnoid space is controlled by adjusting the position of the patient when the density of the local anaesthetic solution is made less than the density of cerebrospinal fluid (i.e., hypobaric) by the addition of distilled water. (05 Mar 2000) |
| hysterical spinal neuralgia | Simulating Pott's disease, following a trauma. (05 Mar 2000) |
| spastic spinal paralysis | A type of cerebral palsy in which there is bilateral spasticity, with the lower extremities more severely affected. Compare: flaccid paralysis. Synonym: Erb-Charcot disease, infantile diplegia, Little's disease, spastic spinal paralysis, tabes spasmodica. (05 Mar 2000) |
| spinal | <anatomy> Pertaining to a spine or to the vertebral column. Origin: L. Spinalis (18 Nov 1997) |
| spinal accessory nerve | <anatomy, nerve> The eleventh cranial nerve enervates the sternocleidomastoid muscles and the trapezius muscles. Lesions of the eleventh result in drooping of the shoulder and inability to rotate the head away from the affected side. (27 Sep 1997) |
| spinal anaesthesia | A form of regional anaesthesia that involves the injection of an anaesthetic into the epidural space (in the spinal canal), at predetermined location along the spine, to produce anaesthesia in all body regions that are supplied by nerves that arise below the anatomic region of the block. Often used for obstetrical procedures. Origin: Gr. Aisthesis = sensation (27 Sep 1997) |
| spinal anaesthetic | A local anaesthetic agent producing loss of sensation when injected into the subarachnoid space. (05 Mar 2000) |
| spinal analgesia | Euphemism for spinal anaesthesia. (05 Mar 2000) |
| spinal apoplexy | Stroke involving the spinal cord. (05 Mar 2000) |
| spinal arteries | Branches of the following arteries which supply the meninges, the roots of the spinal nerves, and in some cases, the spinal cord: 1) vertebral, 2) ascending cervical, 3) dorsal branch of posterior intercostal I to XI, 4) dorsal branch of subcostal, 5) dorsal branch of lumbar arteries, 6) lumbar branch of iliolumbar, 7) lateral sacral; all spinal arteries give rise to radicular arteries supplying dorsal and ventral roots of spinal nerves, but some (4-9), are large enough to reach and anastomose with the anterior and posterior spinal arteries. Synonym: rami radiculares. See: medullary spinal arteries, arteria radicularis magna. Synonym: rami spinales. (05 Mar 2000) |
| spinal ataxia | Ataxia due to spinal cord disease, as in tabes dorsalis. (05 Mar 2000) |
| spinal bifida | A congenital defect in which the neural arches fail to close, so exposing the contents of the spinal canal posteriorly. Usually occurring in the lumbosacral region (lower back) of the spine. (27 Sep 1997) |