nociception measurement method von Frey assay 2021-03-25T17:10:33Z MMO:0000752 PMID:24388923 This is a test introduced by physiologist Maximilian von Frey and modified by Weinstein, to evaluate mechanical allodynia in mice and rats. The test, which may be manual or electronic, uses von Frey hair or fibers, which are small pieces of nylon rod, approximately 50 mm in length, and of varying diameters, to test a rodent's sensitivity to a mechanical stimulus. measurement_method_ontology slaulede von Frey test