The<unk>  is a test for autonomic nervous function (vasovagal response), exerting: * Bradycardia * Hypotension * Decrease of blood flow in the brachial artery * Alterations in the blood flow in the internal carotid artery.
Czermak–Hering test
Conconi test
Ishihara test
Kleihauer–Betke test
Ham test
Yeoman's test
Unterberger test
Heaf test