Results 111 to 120 of about 874,825 (155)
Pennation angle of the soleus in patients with unilateral Achilles tendinopathy
Disability and Rehabilitation, 2008 We measured the ultrasound scans of 23 (21 males, two females) physically active subjects (mean age: 40 years; range: 20 - 58) with unilateral Achilles tendinopathy to determine the pennation angle in the soleus muscles of the affected and non-affected limb. All scans were performed by one radiologist. The pennation angle was lower on the affected side
Nat Padhiar, Otto Chan
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International Journal of Computer Assisted Radiology and Surgery, 2015 Muscles are the primary component responsible for the locomotion and change of posture of the human body. The physiologic basis of muscle force production and movement is determined by the muscle architecture (maximum muscle force, [Formula: see text], optimal muscle fiber length, [Formula: see text], tendon slack length, [Formula: see text], and ...
Christof Hurschler
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Pennation Angle Dependency in Skeletal Muscle Tissue Doppler Strain in Dynamic Contractions
Ultrasound in Medicine and Biology, 2011 Tissue velocity imaging (TVI) is a Doppler based ultrasound technique that can be used to study regional deformation in skeletal muscle tissue. The aim of this study was to develop a biomechanical model to describe the TVI strain's dependency on the pennation angle.
Gabriel Granåsen +2 more
exaly +4 more sources
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Can we just forget about pennation angle?
Journal of Biomechanics, 2022Skeletal muscle design studies, based on anatomical structure, extend back several hundred years. Accurate anatomical drawings show that many muscle fibers are oriented at an angle relative to a muscle's axis of force generation. This pennation angle has been reported in the skeletal muscle biomechanics literature, primarily in the context of trying to
Richard Lieber
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Automatic Measurement of Pennation Angle from Ultrasound Images using Resnets
Ultrasonic Imaging, 2021In this study, an automatic pennation angle measuring approach based on deep learning is proposed. Firstly, the Local Radon Transform (LRT) is used to detect the superficial and deep aponeuroses on the ultrasound image. Secondly, a reference line are introduced between the deep and superficial aponeuroses to assist the detection of the orientation of ...
Qing-Wei Chai +2 more
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Gait & Posture, 2010 The purpose of the current study was to examine the reproducibility of fascicle length and pennation angle of gastrocnemius medialis while human walking. To the best of our knowledge, this is the first study of the reproducibility of fascicle length and pennation angle of gastrocnemius medialis in vivo during human gait.
Aggeloussis, Nickos +3 more
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Change in the pennation angle of the supraspinatus muscle after rotator cuff tear repair
Journal of Shoulder and Elbow Surgery, 2019The pennation angle is an important architectural and functional feature of pennate muscles. The purpose of this study was to investigate the change in the pennation angle of the supraspinatus muscle after rotator cuff tear repair.The study included 68 patients who underwent arthroscopic rotator cuff repair and magnetic resonance imaging.
Makoto Enokida +2 more
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Sex-related differences in motor unit firing rate and pennation angle
Applied Physiology, Nutrition and MetabolismMotor unit firing rate (MUFR) and pennation angle were measured concurrently in males and females from submaximal to maximal intensities. Thirty participants, (16 female, 14 male) performed isometric dorsiflexion contractions at 20%, 40%, 60%, 80%, and 100% of maximal voluntary contraction (MVC). During each contraction, measures of MUFR were obtained
Anita Christie, Alicia Kells
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Measurement of Skeletal Muscle Pennation Angle
2021Pennation angle (PA) is an important indicator for skeletal muscle activity, and automatic calculation of PA has high practical value in fields such as sports medicine and rehabilitation engineering. This chapter mainly introduces the automatic calculation methods used in PA measurement, especially focusing on those related to Hough transform and Radon
Yongjin Zhou, Yong-Ping Zheng
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The acute effects of stretching on pennation angle and force production [PDF]
, 2022 PURPOSE: This study was designed to investigate the acute effects of stretching on pennation angle of the Medial Gastrocnemius and maximal voluntary isotonic plantar flexion.
Miskowiec, Ryan William-Ignatius
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