Abstract：
:Intramuscular pressure (IMP) shows promise for estimating individual muscle tension in vivo. However, previous pressure measurements show high variability during isometric contraction and poor correlation with tension during dynamic contraction. We hypothesized that enhanced sensor anchoring/orientation would improve tension estimation and thus developed a novel pressure sensor with a barbed housing. Sensors were inserted into the tibialis anterior (TA) of New Zealand White rabbits (N = 8) both parallel and perpendicular to the fiber orientation. We measured muscle stress and IMP during both isometric and dynamic contractions. Passive stress showed good agreement for both insertion directions across muscle lengths (ICC > 0.8). Active stress and IMP agreement were good (ICC = 0.87 ± 0.04) for perpendicular insertions but poor (ICC = 0.21 ± 0.22) for parallel insertions across both dynamic contractions and isometric contractions within the muscle's range of motion. These findings support use of IMP measurements to estimate muscle tension across a range of contraction conditions.
journal_name
Ann Biomed Engjournal_title
Annals of biomedical engineeringauthors
O'Connor SM,Kaufman KR,Ward SR,Lieber RLdoi
10.1007/s10439-020-02633-7subject
Has Abstractpub_date
2021-02-01 00:00:00pages
912-921issue
2eissn
0090-6964issn
1573-9686pii
10.1007/s10439-020-02633-7journal_volume
49pub_type
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