title: [Elastic behavior of the median nerve and ulnar nerve in situ and in vitro].
abstract: This study was performed to investigate the mechanical properties of the median and the ulnar nerve in ten fresh cadaver extremities in situ and in a second series in vitro in a strain controlled testing equipment. In situ the nerves were fixed in the equipment at the level of the insertion of the pectoral muscle. The extensions of the nerves were tested in the undissected bed of the nerve with loads from 2 to 25 Newtons. The extension rate of three sections was measured: A: Axilla-wrist, B: Axilla-forearm, C: Axilla-elbow. On the contralateral arm the section D: Axilla-wrist was measured after cutting the nerve's branches without destroying the nerve's bed. The values of the section A, B, and C were significantly different. The nerves were less extensible the more distal the load was fixed. The values of the two sections with equal length A, without, and D, after cutting the nerve's branches also were significantly different (p less than 0.001). The in vitro series showed that the nerves were more extensible after removal of the connective tissue of the nerve's bed.
authors.affiliation: Abteilung für Plastische und Rekonstruktive Chirurgie, I. Chirurgischen Universitätsklinik, Wien.
authors.forename: G
authors.initials: G
authors.lastname: Zöch
authors.forename: R
authors.initials: R
authors.lastname: Reihsner
authors.forename: H
authors.initials: H
authors.lastname: Millesi
mesh_terms: D001696:Biomechanical Phenomena; D004548:Elasticity; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000502:physiology*; D012016:Reference Values; D014459:Ulnar Nerve / Q000502:physiology*; D014955:Wrist Joint / Q000502:physiology
vernacular_title: Dehnungsverhalten des N. medianus und des N. ulnaris in situ und in vitro.