Abstract
The contact point (P) made by both the echoes of the aponeurosis and from interspaces among fascicles of the tibialis anterior muscle was detected by real-time ultrasound scanning in 12 adults. Movement in the location of P was observed during muscle contraction and its displacement was related to changes in ankle joint angles (r = 0.81,P < 0.01), i.e. P shifted proximally when the ankle joint was dorsiflexed. There was also a significant positive correlation between the degree of dorsiflexion and the velocity related to the change in location of P (r = 0.84,P < 0.01). Ultrasound measurements of the displacement and the velocity of P were reproducible as there was no variation noticed among measurements on different days. It is suggested from these results that the displacement of P reflected changes in muscle length during contraction and that this amount of change corresponded to changes in joint angles.
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Kuno, Sy., Fukunaga, T. Measurement of muscle fibre displacement during contraction by real-time ultrasonography in humans. Europ. J. Appl. Physiol. 70, 45–48 (1995). https://doi.org/10.1007/BF00601807
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DOI: https://doi.org/10.1007/BF00601807