| posterior border of eyelids | The posterior edge of the free margin of each eyelid, which is also the border of the conjunctiva. (05 Mar 2000) |
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| posterior border of fibula | The ridge on the posterior aspect of the fibula extending from the head to the medial aspect of the peroneal groove. Synonym: margo posterior fibulae. (05 Mar 2000) |
| posterior border of petrous part of temporal bone | The margin of the petrous part of the temporal bone that extends from the apex to the jugular notch; it articulates with the basal and jugular portions of the occipital bone. Synonym: margo posterior partis petrosae ossis temporalis. (05 Mar 2000) |
| posterior border of radius | The ridge on the radius that extends from the tuberosity to the tubercle on the posterior aspect of the distal extremity. Synonym: margo posterior radii. (05 Mar 2000) |
| posterior border of testis | The rounded posterior portion of the testis into which the vessels enter. Synonym: margo posterior testis. (05 Mar 2000) |
| posterior border of ulna | The sinuous palpable subcutaneous ridge on the posterior aspect of the ulna that extends from near the olecranon to the styloid process, demarcating "anterior" (flexor) from "posterior" (extensor) compartments of forearm. Synonym: margo posterior ulnae. (05 Mar 2000) |
| anatomical position | The erect position of the body with the face directed forward (skull aligned in orbitomeatal or Frankfort plane); the arms at the side and the palms of the hands directed forward; the terms posterior, anterior, lateral, medial, etc., are applied to the parts as they stand related to each other and to the axis of the body when in this position. (05 Mar 2000) |
| Bozeman's position | Knee-elbow position, the patient being strapped to supports. (05 Mar 2000) |
| Valentine's position | A supine position on a table with double inclined plane so as to cause flexion at the hips; used to facilitate urethral irrigation. (05 Mar 2000) |
| mandibular hinge position | Any position of the mandible which exists when the condyles are so situated in the temporomandibular joints that opening or closing movements can be made on the hinge axis. (05 Mar 2000) |
| genucubital position | A prone position resting on the knees and elbows, assumed for gynecologic or rectal examination or operation. Synonym: genucubital position. (05 Mar 2000) |
| genupectoral position | A prone posture resting on the knees and upper part of the chest, assumed for gynecologic or rectal examination. Synonym: genupectoral position. (05 Mar 2000) |
| Casselberry position | A prone position assumed when drinking, after intubation, in order to prevent the entrance of fluid into the tube. (05 Mar 2000) |
| Mayo-Robson's position | A supine position with a thick pad under the loins, causing a marked lordosis in this region; used in operations on the gallbladder. (05 Mar 2000) |
| centric position | The position of the mandible in its most retruded unstrained relation to the maxillae. See: centric jaw relation. (05 Mar 2000) |