Tags

Type your tag names separated by a space and hit enter

Fiber length variability within the flexor carpi ulnaris and flexor carpi radialis muscles: implications for surgical tendon transfer.
J Hand Surg Am. 2004 Sep; 29(5):909-14.JH

Abstract

PURPOSE

The purpose of this study was to understand the detailed architectural properties of the human flexor carpi radialis (FCR) and flexor carpi ulnaris (FCU) muscles and their implications for tendon transfer surgery.

METHODS

Muscle fiber length was measured in 6 separate regions of the FCU and FCR from 10 cadaveric specimens. Sarcomere length was measured by laser diffraction for normalization. Moment arms were estimated by measuring tendon excursion with respect to joint angle. The position of entry of the motor nerve branches into each muscle also was measured to establish limits for the safe length of muscle mobilization.

RESULTS

Muscle fiber length varied significantly along both the FCU and FCR. Fiber length variability in the FCU was twice that of the FCR. Although the average fiber length for both muscles across all regions was similar (62.6 +/- 2.1 mm for the FCR and 63.1 +/- 4.0 mm for the FCU), the proximal fibers of the FCU were longer compared with the proximal fibers of the FCR and the distal fibers of the FCU were shorter compared with the distal fibers of the FCR. The 99% confidence interval for the second nerve branch entry into the muscles was located approximately 69 mm distal to the medial epicondyle for the FCU and approximately 73 mm distal for the FCR.

CONCLUSIONS

These data show different designs of both the FCU and the FCR. The functional significance of fiber length variability is not clear but imply that, when used in tendon transfer, the properly mobilized FCU has a much greater excursion.

Authors+Show Affiliations

Department of Hand Surgery, Sahlgrenska University Hospital, Göteborg, Sweden.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

15465243

Citation

Fridén, Jan, et al. "Fiber Length Variability Within the Flexor Carpi Ulnaris and Flexor Carpi Radialis Muscles: Implications for Surgical Tendon Transfer." The Journal of Hand Surgery, vol. 29, no. 5, 2004, pp. 909-14.
Fridén J, Lovering RM, Lieber RL. Fiber length variability within the flexor carpi ulnaris and flexor carpi radialis muscles: implications for surgical tendon transfer. J Hand Surg Am. 2004;29(5):909-14.
Fridén, J., Lovering, R. M., & Lieber, R. L. (2004). Fiber length variability within the flexor carpi ulnaris and flexor carpi radialis muscles: implications for surgical tendon transfer. The Journal of Hand Surgery, 29(5), 909-14.
Fridén J, Lovering RM, Lieber RL. Fiber Length Variability Within the Flexor Carpi Ulnaris and Flexor Carpi Radialis Muscles: Implications for Surgical Tendon Transfer. J Hand Surg Am. 2004;29(5):909-14. PubMed PMID: 15465243.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fiber length variability within the flexor carpi ulnaris and flexor carpi radialis muscles: implications for surgical tendon transfer. AU - Fridén,Jan, AU - Lovering,Richard M, AU - Lieber,Richard L, PY - 2003/12/10/received PY - 2004/04/20/accepted PY - 2004/10/7/pubmed PY - 2005/4/23/medline PY - 2004/10/7/entrez SP - 909 EP - 14 JF - The Journal of hand surgery JO - J Hand Surg Am VL - 29 IS - 5 N2 - PURPOSE: The purpose of this study was to understand the detailed architectural properties of the human flexor carpi radialis (FCR) and flexor carpi ulnaris (FCU) muscles and their implications for tendon transfer surgery. METHODS: Muscle fiber length was measured in 6 separate regions of the FCU and FCR from 10 cadaveric specimens. Sarcomere length was measured by laser diffraction for normalization. Moment arms were estimated by measuring tendon excursion with respect to joint angle. The position of entry of the motor nerve branches into each muscle also was measured to establish limits for the safe length of muscle mobilization. RESULTS: Muscle fiber length varied significantly along both the FCU and FCR. Fiber length variability in the FCU was twice that of the FCR. Although the average fiber length for both muscles across all regions was similar (62.6 +/- 2.1 mm for the FCR and 63.1 +/- 4.0 mm for the FCU), the proximal fibers of the FCU were longer compared with the proximal fibers of the FCR and the distal fibers of the FCU were shorter compared with the distal fibers of the FCR. The 99% confidence interval for the second nerve branch entry into the muscles was located approximately 69 mm distal to the medial epicondyle for the FCU and approximately 73 mm distal for the FCR. CONCLUSIONS: These data show different designs of both the FCU and the FCR. The functional significance of fiber length variability is not clear but imply that, when used in tendon transfer, the properly mobilized FCU has a much greater excursion. SN - 0363-5023 UR - https://www.unboundmedicine.com/medline/citation/15465243/Fiber_length_variability_within_the_flexor_carpi_ulnaris_and_flexor_carpi_radialis_muscles:_implications_for_surgical_tendon_transfer_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0363-5023(04)00362-4 DB - PRIME DP - Unbound Medicine ER -