Bipennate muscles may be split along their distal aponeurosis, dividing each into two compartments. These sub-muscle units may be used in tendon transfers. This paper presents the contractile properties of the two sub-units of the flexor carpi ulnaris in a macaca fascicularis, after it was split by up to 80% of its length. The sub-muscle units were electrically stimulated and found to have independent isometric contraction, with minimal contraction recorded from the non-stimulated sub-unit. Also, the sum of the forces measured from each unit when stimulated individually, was found to be greater than the force of the whole muscle, given the same isometric conditions. The distal aponeurosis which is common allows force transmission between the compartments. Splitting the muscle along this distal aponeurosis alters this function and the force capacity of the muscle, providing a new potential for using the sub-units as grafts for tendon transfers.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.orthres.2004.04.008 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Anatomy of the distal tendinous structure of the triceps brachii: implications for the role of the triceps brachii to resist valgus elbow forces during baseball pitching.
J Shoulder Elbow Surg
January 2025
Department of Clinical Anatomy, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan.
Background: Biomechanical studies suggest that the triceps brachii muscle generates resistive force against valgus stress on the elbow during baseball pitching. However, given the parallel fiber orientation in the distal tendinous structure of the triceps brachii, the mechanism behind this anti-valgus force remains unclear. In the present study, we aimed to examine the anatomy of the distal tendinous structure of the triceps brachii using bony morphological, macroscopic, and histological methods.
View Article and Find Full Text PDFMechanical properties of the bicipital aponeurosis.
J Mech Behav Biomed Mater
December 2024
School of Engineering, University of Guelph, Guelph, Ontario, Canada. Electronic address:
As a biarticular muscle, the biceps brachii both supinates the forearm and flexes the elbow and shoulder, thus allowing the upper limb to perform a variety of activities of daily living (ADL). The biceps brachii originates on the coracoid apex as well as the supraglenoid tubercle and inserts on the radial tuberosity. At the distal end, the bicipital aponeurosis (BA) provides a transition of the biceps tendon into the antebrachial fascia.
View Article and Find Full Text PDFDistal biceps tendon injuries treatment: A survey of orthopaedic surgeons' current practice and preferences.
Shoulder Elbow
October 2024
Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada.
Purpose: Distal biceps tendon (DBT) injuries are relatively uncommon. Controversies exist regarding the best approach, leading to variations in treatment. This study aims to understand the preferences and practices of orthopedic surgeons regarding management of DBT injuries, as well as assess the feasibility of a future pilot randomized controlled trial (RCT) to evaluate the impact of various surgical factors on patient outcomes.
View Article and Find Full Text PDFMagnetic resonance classification proposal for medial gastrocnemius muscle injuries.
Quant Imaging Med Surg
November 2024
FCBarcelona Medical Department (FIFA Medical Center of Excellence), Barça Innovation Hub, Barcelona, Spain.
Article Synopsis
- * An ultrasound-based classification system helps identify four types of distal gastrocnemius injuries based on lesion location and specific ultrasound signs, aiding recovery time estimates.
- * A new MRI protocol using T1-weighted and fluid-sensitive imaging is designed to evaluate these injury types, enhancing diagnostics and helping optimize recovery strategies for athletes.
Triceps aponeurosis and deltoid tuberosity as a landmarks for radial nerve dissection: a cadaveric study.
JSES Int
September 2024
Department of Orthopedic Surgery, Hasharon Hospital, Petah Tikva, Israel.
Background: The radial nerve, originating from the posterior cord of the brachial plexus, traverses the posterior humerus. Incidences of radial nerve injury have been noted following surgical interventions like fracture fixation and exploration in this area. There's a paucity of literature detailing soft tissue anatomical cues for radial nerve dissection.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!