| PIIS | posterior inferior iliac spine |
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| PNS | paraneoplastic syndrome; parasympathetic nervous system; partial nonprogressive stroke; peripheral n... |
| PSIS | posterior sacroiliac spine |
| SLAP | Superior Labrum Anterior to Posterior |
| PCA | para-chloramphetamine; parietal cell antibody; passive cutaneous anaphylaxis; patient care assistant... |
| cleft spine | See: spina bifida. (05 Mar 2000) |
|---|---|
| poker spine | Stiff spine resulting from widespread joint immobility or overwhelming muscle spasm as might be evoked by an osteomyelitis of a vertebra or a rheumatoid spondylitis. (05 Mar 2000) |
| crest of scapular spine | The posterior subcutaneous border of the spine of the scapula that expands in its medial part into a smooth triangular area. (05 Mar 2000) |
| haemal spine | The middle point on the underside of the haemal arch of the typical vertebra; considered by some to be represented by the sternum in humans. (05 Mar 2000) |
| Henle's spine | Small bony prominence anterior to the supramastoid pit at the posterosuperior margin of the bony external acoustic meatus. Synonym: spina suprameatica, Henle's spine, meatal spine, spina meatus. (05 Mar 2000) |
| sciatic spine | A pointed process from the posterior border of the ischium on a level with the lower border of the acetabulum; gives attachment to the sacrospinous ligament; the pudendal nerve passes dorsal to the ischial spine, which is palpable per vagina or rectum, and thus is used as a target for the needle-tip in administering a pudendal nerve block. Synonym: spina ischiadica, ischiadic spine, sciatic spine. (05 Mar 2000) |
| pubic spine | A small projection at the anterior extremity of the crest of the pubis about 2 cm from the symphysis. Synonym: tuberculum pubicum, pubic spine, spina pubis. (05 Mar 2000) |
| sphenoidal spine | A posterior and downward projection from the greater wing of the sphenoid bone on either side, located posterolateral to the foramen spinosum, so-named for its proximity to the sphenoidal spine; gives attachment to the sphenomandibular ligament. Synonym: processus spinosus, spina ossis sphenoidalis, alar spine, angular spine, spina angularis, spinous process. (05 Mar 2000) |
| spine | A stiff, sharp-pointed structure, formed by modification of a plant organ, for example a lateral branch or a stipule. (09 Oct 1997) |
| spine cell | <cell biology> Large flattened polygonal cells of the stratum germinosum of the epidermis (just above the basal stem cells), that appear in the light microscope to have fine spines projecting from their surfaces, these terminate in desmosomes that link the cells together and have many tonofilaments of cytokeratin within them. (05 Mar 1998) |
| spine-finned | <zoology> Having fine supported by spinous fin rays; said of certain fishes. Source: Websters Dictionary (01 Mar 1998) |
| spine fracture | A break in the bony cortex of the vertebrae. Spine fractures must be assessed as stable or unstable. Unstable spine fractures pose a risk of spinal cord injury due to abnormal movement at the fracture site. (27 Sep 1997) |
| spine of helix | An anteriorly directed spine at the extremity of the crus of the helix of the auricle. Synonym: spina helicis, apophysis helicis. (05 Mar 2000) |
| spine of scapula | The prominent triangular ridge on the dorsal aspect of the scapula, providing attachment for the trapezius and deltoid muscles and separating the supra-and infraspinous fossae. Synonym: spina scapulae. (05 Mar 2000) |
| spine sign | <clinical sign> Resistance to flexion of the spine in cases of meningitis. (05 Mar 2000) |