posterior perforated substance n.
The bottom of the interpeduncular fossa at the base of the mesencephalon, containing openings for the passage of perforating branches of cerebral arteries.
noun 1. See under . noun, Anatomy. 1. a small, somewhat cherry-shaped double structure attached by a stalk to the base of the brain and constituting the master endocrine gland affecting all hormonal functions in the body, consisting of an anterior region ((anterior pituitary) or (adenohypophysis)) that develops embryonically from the roof of the mouth […]
- Posterior probability
noun 1. (statistics) the probability assigned to some parameter or to an event on the basis of its observed frequency in a sample, and calculated from a prior probability by Bayes’ theorem Compare prior probability See also empirical (sense 5)
- Posterior pyramid of medulla
posterior pyramid of medulla n. See fasciculus gracilis.
- Posterior rhinoscopy
posterior rhinoscopy n. Examination of the nasopharynx and posterior portion of the nasal cavity using a rhinoscope or a nasopharyngoscope.