| spinal point | The centre of the root of the anterior nasal spine. Synonym: apophysary point, apophysial point, spinal point. (05 Mar 2000) |
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| spinal puncture | Tapping of the subarachnoid space in the lumbar region, usually between the third and fourth lumbar vertebrae. (12 Dec 1998) |
| spinal quotient | The cerebrospinal index when 10 ml of cerebrospinal fluid have been removed. Synonym: Ayala's quotient, spinal quotient. (05 Mar 2000) |
| spinal reflex | A reflex arc involving the spinal cord. See: reflex arc. (05 Mar 2000) |
| spinal root of accessory nerve | <anatomy, nerve> Originates from the upper five or six cervical spinal segments, emerges from the lateral surface of the spinal cord and ascends through the foramen magnum to join the cranial root. Synonym: radices spinales nervi accessorii, ramus externus nervi accessorii, pars spinalis nervi accessorii, spinal part of accessory nerve. (05 Mar 2000) |
| spinal shock | Transient depression or abolition of reflex activity below the level of an acute spinal cord injury or transection. (05 Mar 2000) |
| spinal sign | <clinical sign> In pleurisy, the spinal muscles are in a state of tonic contraction on the affected side. (05 Mar 2000) |
| spinal stenosis | An abnormal narrowing of the spinal canal that may be either congenital or acquired. Treatment is generally surgical to widen the spinal canal. Laminectomy may be the indicated surgical procedure to reduce pressure on the spinal cord. (27 Sep 1997) |
| spinal stroke | Abrupt onset of focal spinal cord dysfunction caused by a disturbance in its blood supply. (05 Mar 2000) |
| spinal tap | A diagnostic procedure where a sterile needle is introduced into the lower spine (L2) to collect cerebrospinal fluid for diagnostic purposes. Chemical analysis, cellular analysis and CSF pressure can all be measured with this procedure. This test can aid in the diagnosis of meningitis, subarachnoid haemorrhage and multiple sclerosis. (27 Sep 1997) |
| spinal tract | Any one of a multitude of fibre bundles ascending or descending in the spinal cord. (05 Mar 2000) |
| spinal tract of trigeminal nerve | <anatomy, nerve> A compact fibre bundle, comma-shaped on transverse section, composed of primary sensory fibres of the portio major of the trigeminal nerve, descending from the level of the entrance of the trigeminus in the upper pons down through the dorsolateral region of the rhombencephalic tegmentum along the lateral side of the descending or spinal nucleus of the trigeminus, emerging on the dorsolateral surface of the lower medulla oblongata as the tuberculum cinereum, and continuing as far as the second cervical segment of the spinal cord. Its fibres are distributed to the descending or spinal nucleus of the trigeminus. Synonym: tractus spinalis nervi trigemini, descending tract of trigeminal nerve, tractus descendens nervi trigemini. (05 Mar 2000) |
| spinal tractotomy | Division of the anterolateral quadrant of the spinal cord to section the spinothalamic tract. Synonym: anterolateral tractotomy, spinal tractotomy, spinothalamic cordotomy. (05 Mar 2000) |
| spinal trigeminal nucleus | The long sensory nucleus extending from the caudal border of the pontine sensory nucleus of the trigeminus down through the lateral region of the rhombencephalon into the upper three segments of the spinal cord's dorsal horn; it receives the fibres of the sensory root of the trigeminal nerve which descend along its lateral border as the spinal tract of trigeminal nerve. Synonym: nucleus tractus spinalis nervi trigemini, descending nucleus of the trigeminus, spinal nucleus of the trigeminus. (05 Mar 2000) |
| spinal tumour | A spinal cord tumour is a aggregate if cells that form a mass that can compress the spinal cord. Spinal cord tumours may arise from local structures (for example meninges) or from a cancer from a distant site (i.e. Metastasis). Regardless of the aetiology, all spinal cord tumours cause symptoms from compression on the spinal cord, surrounding nerve roots or blood vessels that supply the cord. Symptoms are variable with the extent and the level of the spinal cord tumour. Common symptoms include back pain that may radiate, numbness and tingling to the lower extremities, muscle weakness in the legs, difficulty walking and loss of bowel and bladder control (incontinence). (27 Sep 1997) |
Synonyms : Spirostadienes, Spirostanols, Spirostatrienes, Spirostenes
Synonyms :
Synonyms :
Synonyms : Infections, Spirurida, Habronemiases, Infection, Spirurida, Spirurida Infection
Synonyms :
| spinal animal |
an animal whose spinal cord has been severed, thus cutting off communication with the brain.
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| spinal meningocele |
hernial protrusion of the meninges through a defect in the vertebral column (spina bifida), usually posteriorly, forming a fluid-filled sac; locations are almost always in the thoracic or lumbar region although cervical and sacral ones do occur. See also myelomeningocele.
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| spinal pachymeningitis |
inflammation of the dura of the spinal column.
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| spinal subarachnoid block |
a condition in which the flow of cerebrospinal fluid is interfered with by an obstruction in the spinal canal; called also dynamic b.
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| spinal tuberculosis |
tuberculosis of spine, osteitis or caries of the vertebrae, usually occurring as a complication of tuberculosis of the lungs; it is marked by stiffness of the vertebral column, pain on motion, tenderness on pressure, prominence of certain of the vertebral spines, and occasionally abdominal pain, abscess formation, and paralysis. Called also David's disease, Pott's disease, spondylitis tuberculosa, and tuberculous spondylitis.
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| SPI | the amount that has spilled |
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| SPI | United States writer of popular detective novels (born in 1918) |
| SPI | a long fishing line with many shorter lines and hooks attached to it (usually suspended between buoys) |
| SPI | an attacker who sheds or spills blood |
| SPI | a thin strip of wood used in playing the game of jackstraws |
| SPI | a game in which players try to pick each jackstraw (or spillikin) off of a pile without moving any of the others |
| SPI | (economics) any indirect effect of public expenditure |
| SPI | a channel that carries excess water over or around a dam or other obstruction |
| SPI | a genus of Mustelidae |
| SPI | small skunk with a marbled black and white coat |
| SPI | rapid descent of an aircraft in a steep spiral spin |
| SPI | the act of rotating rapidly |