Results 161 to 170 of about 6,879 (202)

Human gastrocnemius medialis Pennation Angle as a Function of Age: From Newborn to the Elderly.

Journal of Physiological Anthropology and Applied Human Science, 2001
The aim of the present study was to quantify changes in human skeletal muscle pennation angle (F theta) values during growth and adult life. The human gastrocnemius medialis muscle of 162 subjects (96 males and 66 females) in the age range 0-70 years was scanned with ultrasonography. The subjects were laying prone, at rest, with the ankle maintained at
Tiziano Binzoni, Sylviane Hanquinet, André Kaelin   +2 more
exaly   +6 more sources

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Measurement of Skeletal Muscle Pennation Angle

2021
Pennation 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
openaire   +1 more source

Pennation angles of the intrinsic muscles of the foot

Journal of Biomechanics, 2001
As mathematical models of the musculoskeletal system become increasingly detailed and precise, they require more accurate information about the architectural parameters of the individual muscles. These muscles are typically represented as Hill-type models, which require data on fiber length, physiological cross-sectional area (PCSA) and pennation angle.
W R, Ledoux, B E, Hirsch, T, Church, M, Caunin   +3 more
openaire   +2 more sources

Change in the pennation angle of the supraspinatus muscle after rotator cuff tear repair

Journal of Shoulder and Elbow Surgery, 2019
The 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.
Ikuta Hayashi, Makoto Enokida, Keita Nagira   +2 more
exaly   +3 more sources

The Relationship between SEMG and Change in Pennation Angle of Brachialis

2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2007
Surface Electromyography (SEMG) signals have been widely used for the functional assessment of muscles. On the other hand, sonography has been commonly used to detect the morphological information of human muscles in both static and dynamic conditions.
Jun, Shi, Yongping, Zheng, Zhuangzhi, Yan   +2 more
openaire   +2 more sources

Automatic Extraction of Muscle Fascicle Pennation Angle from Raw Ultrasound Data

2022 IEEE Sensors Applications Symposium (SAS), 2022
Compact, wearable, wireless ultrasound (US) sensing systems are promising devices for the observation of human muscle dynamics, offering low power, non-invasive continuous monitoring of contracting muscles. Plane wave imaging is an ideal imaging modality to meet the high frame rate requirements of fast contracting muscles.
Soley Hafthorsdottir, Sergei Vostrikov, Andrea Cossettini, Michael Rieder, Christoph Leitner, Michele Magno, Luca Benini   +6 more
openaire   +1 more source

Short Communication: Pennation Angle Variability in Human Muscle

Journal of Applied Biomechanics, 2014
The pennated arrangement of muscle fibers has important implications for muscle function in vivo, but complex arrangement of muscle fascicles in whole muscle raises the question whether the arrangement of fascicles produce variations in pennation angle throughout muscle.
Benjamin W, Infantolino, John H, Challis
openaire   +2 more sources

Sex-related differences in motor unit firing rate and pennation angle

Applied Physiology, Nutrition and Metabolism
Motor 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
Alicia M Kells, Anita Christie, Anita D Christie   +2 more
exaly   +3 more sources

Automatic pennation angle measurement in musculoskeletal ultrasound image

2012 International Conference on Computerized Healthcare (ICCH), 2012
Pennation angle is the most often adopted sonomyography (SMG) measurement to quantify muscle activities under different contractions because of its independence on the position and the field of view in B-mode imaging. In this paper, a new paradigm for automatic pennation angle estimation was described, which used some unique features of musculoskeletal
Guangquan Zhou, Yong-Ping Zheng
openaire   +1 more source

Changes in pennation angle in rotator cuff muscles with torn tendons

Journal of Orthopaedic Science, 2012
Although several authors have reported on the pennation angles of intact rotator cuff muscles, the relationship between their alteration and rotator cuff tears has not been fully clarified. The purpose of this study was to measure the pennation angles of human cadaveric rotator cuff muscles with torn tendons.Twenty embalmed cadaveric shoulders were ...
Jianlin, Zuo, Hirotaka, Sano, Eiji, Itoi
openaire   +2 more sources