| OTS | occipital temporal sulcus; orotracheal suction |
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| RoS | rostral sulcus |
| PCA | para-chloramphetamine; parietal cell antibody; passive cutaneous anaphylaxis; patient care assistant... |
| PCL | pacing cycle length; persistent corpus luteum; plasma cell leukemia; posterior chamber lens; posteri... |
| PD | Doctor of Pharmacy; Dublin Pharmacopoeia; interpupillary distance; Paget disease; pancreatic duct; p... |
| sulcus medianus linguae | <anatomy> Median groove or median longitudinal raphe of tongue; raphe linguae; a slight longitudinal depression running forward on the dorsal surface of the tongue from the foramen caecum. Synonym: sulcus medianus linguae, median longitudinal raphe of tongue, raphe linguae. (05 Mar 2000) |
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| sulcus medianus ventriculi quarti | <anatomy> The shallow midline groove in the floor of the ventricle. Synonym: sulcus medianus ventriculi quarti. (05 Mar 2000) |
| sulcus nervi spinalis | <anatomy, nerve> The laterally directed groove on the superior surface of the transverse processes of typical cervical vertebrae between the anterior and posterior tubercles along which the emerging spinal nerve passes. Synonym: sulcus nervi spinalis. (05 Mar 2000) |
| medianus | Synonym: median. Origin: L. (05 Mar 2000) |
| nervus medianus | <anatomy, nerve> A major nerve of the upper extremity. In humans, the fibres of the median nerve originate in the lower cervical and upper thoracic spinal cord (usually c6 to t1), travel via the brachial plexus, and supply sensory and motor innervation to parts of the forearm and hand. (12 Dec 1998) |
| arteria spinalis posterior | <anatomy, artery> Origin, vertebral; distribution, medulla, spinal cord, and pia mater; anastomoses, spinal branches of intercostal arteries. Synonym: arteria spinalis posterior. (05 Mar 2000) |
| venae medullae oblongatae | Several veins draining the medulla oblongata; they are tributaries of the anterior spinal vein and the petrosal vein. Synonym: veins of medulla oblongata. (05 Mar 2000) |
| raphe medullae oblongatae | The seamlike median zone of the medulla oblongata, marked by intercrossing fibre bundles among which lie scattered neuronal cell bodies. (05 Mar 2000) |
| pyramis medullae oblongatae | An elongated, white prominence on the ventral surface of the medulla oblongata on either side along the anterior median fissure, corresponding to the pyramidal tract. Synonym: pyramis medullae oblongatae, anterior column of medulla oblongata, anterior pyramid. (05 Mar 2000) |
| nucleus gigantocellularis medullae oblongatae | One of the three major nuclei of the reticular formation of the brainstem. Synonym: nucleus gigantocellularis medullae oblongatae. (05 Mar 2000) |
| nucleus lateralis medullae oblongatae | A group of cells in the medulla oblongata, located between the inferior olive and the descending trigeminal nucleus, receiving fibres from the spinal cord and motor cortex and projecting to the cerebellum. Synonym: nucleus lateralis medullae oblongatae, lateral reticular nucleus. (05 Mar 2000) |
| fissura mediana anterior medullae oblongatae | The longitudinal groove in the midline of the anterior aspect of the medulla oblongata; it is the medullary equivalent of the anterior median fissure of the spinal cord and ends at the foramen caecum posterius; its caudal part is obliterated by the decussation of the pyramids. Synonym: fissura mediana anterior medullae oblongatae, anteromedian groove. (05 Mar 2000) |
| foramen caecum medullae oblongatae | <anatomy> A small triangular depression at the lower boundary of the pons that marks the upper limit of the median fissure of the medulla oblongata. Synonym: foramen caecum posterius, Vicq d'Azyr's foramen. (05 Mar 2000) |
| posterior branch of lateral cerebral sulcus | The long, posteriorly-directed continuation of the lateral cerebral sulcus which extends between the temporal lobe inferiorly and the parietal lobe superiorly, its termination surrounded by the supramarginal gyrus. Synonym: ramus posterior sulci lateralis cerebri. (05 Mar 2000) |
| posterior intermediate sulcus | A longitudinal furrow between the posterior median and the posterolateral sulci of the spinal cord in the cervical region, marking the gracile fasciculus from the cuneate fasciculus. Synonym: sulcus intermedius posterior, posterior intermediate groove. (05 Mar 2000) |