| posterior recess | A deepening of the interpeduncular fossa toward the pons. Synonym: recessus posterior. (05 Mar 2000) |
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| posterior recess of tympanic membrane | A narrow pocket in the tympanic wall between the posterior malleolar fold and the tympanic membrane. Synonym: recessus membranae tympani posterior, Troltsch's pockets, Troltsch's recesses. (05 Mar 2000) |
| posterior region of arm | The back of arm. Synonym: facies brachialis posterior, regio brachialis posterior, posterior brachial region, posterior surface of arm. (05 Mar 2000) |
| posterior region of elbow | The back of the elbow. Synonym: facies cubitalis posterior, regio cubitalis posterior, posterior cubital region, posterior surface of elbow. (05 Mar 2000) |
| posterior region of forearm | The area between the radial and ulnar borders of the forearm posteriorly. Synonym: regio antebrachialis posterior, facies antebrachialis posterior, posterior antebrachial region, posterior surface of forearm. (05 Mar 2000) |
| posterior region of leg | The back of the leg. Synonym: regio cruralis posterior, posterior crural region, posterior surface of leg. (05 Mar 2000) |
| posterior region of neck | The back of neck, including the suboccipital region. Synonym: regio nuchalis, nuchal region, posterior neck region, regio cervicalis posterior. (05 Mar 2000) |
| posterior region of thigh | The back of the thigh. Synonym: facies femoralis posterior, posterior surface of thigh, regio femoralis posterior. (05 Mar 2000) |
| posterior rhinoscopy | Inspection of the nasopharynx and posterior portion of the nasal cavity by means of the rhinoscope, or with a nasopharyngoscope. See: nasopharyngoscopy. (05 Mar 2000) |
| posterior rhizotomy | Section of posterior spinal root. Synonym: Dana's operation. (05 Mar 2000) |
| posterior root | The sensory root of a spinal nerve, having a dorsal root ganglion containing the nerve cell bodies of the fibres conveyed by the root in its distal end. Synonym: radix posterior, radix sensoria, posterior root, radix dorsalis. (05 Mar 2000) |
| posterior sacroiliac ligaments | The heavy fibrous bands that pass from the ilium to the sacrum posterior to the sacroiliac joint. Synonym: ligamenta sacroiliaca posteriora, dorsal sacroiliac ligaments, ligamentum sacroiliacum posterius. (05 Mar 2000) |
| posterior sacrosciatic ligament | <anatomy> The ligament that passes from the ischial tuberosity to the ilium, sacrum, and coccyx, transforming the scialic notch to a large scialic foramen, which is then further subdivided by the sacrospinous ligament. Synonym: ligamentum sacrotuberale, ligamentum sacrotuberosum, posterior sacrosciatic ligament. (05 Mar 2000) |
| posterior saemicircular canals | The three bony tubes in the labyrinth of the ear within which the membranous saemicircular ducts are located; they lie in planes at right angles to each other and are known as anterior saemicircular canal, posterior saemicircular canal, and lateral saemicircular canal. Synonym: canales saemicirculares ossei. (05 Mar 2000) |
| posterior sagittal diameter | Distance from the sacrococcygeal junction to the middle of an imaginary line running between the left and right ischial tuberosities. (05 Mar 2000) |