In medicine, the<unk>  is performed by forcibly exhaling against closed lips and pinched nose, forcing air into the middle ear if the Eustachian tube is open. This<unk>  with slight modifications can be used as a test of cardiac function and autonomic nervous control of the heart or to ‘clear’ the ears (equalize pressure) when ambient pressure changes, as in diving or aviation.
The technique is named for Antonio Maria<unk> , the 17th Century physician and anatomist from Bologna, whose principal scientific interest was the human ear. He described the Eustachian tube and the<unk>  to test its patency.
Valsalva maneuver
Phalen's maneuver
Concussion
Straight leg raise
Hypnic jerk
Trendelenburg position
Palpation of the precordium
Leopold's maneuvers