The back portion of the pituitary, a small gland in the head called the master gland.
The posterior pituitary secretes the hormone oxytocin which increases uterine contractions and antidiuretic hormone (ADH) which increases reabsorption of water by the tubules of the kidney. Underproduction of ADH results in a disorder called diabetes insipidus characterized by inability to concentrate the urine and, consequently, excess urination leading potentially to dehydration. The urine is “insipid” (overly dilute).
- Posterior urethral valves Medical Definition
McGraw-Hill Professional, 2012.
From back to front. A chest x-ray taken with the chest against the film plate and the x-ray machine behind the patient is a posteroanterior (PA) view. As opposed to anteroposterior (AP). For a more complete listing of terms used in medicine for spatial orientation, please see the entry to “Anatomic Orientation Terms”.
- Postherpetic neuralgia
The most common complication of shingles, persistence of the pain associated with shingles beyond 1 month, even after the rash is gone. The pain can be severe and debilitating, and it occurs primarily in persons over age 50. The pain of postherpetic neuralgia can be reduced by certain medications including tricyclic antidepressant medications and some […]
inflammation of both the glans and foreskin. Circumcision prevents balanoposthitis. Without a foreskin, there can of course be no posthitis and hence no balanoposthitis. An uncircumcised boy should be taught to clean his penis with care to prevent infection and inflammation of the foreskin. Cleaning of the penis is done by gently, not forcibly, retracting […]
- Postmature infant
A baby born 2 weeks (14 days) or more after the usual 9 months (280 days) of gestation. The gestation (length of the pregnancy) is calculated from the date of the last menstrual period (LMP). This is an important calculation since, if delivery is delayed 3 weeks beyond term, the infant mortality rate skyrockets to […]