TY - JOUR
T1 - Pennation angles of ankle dorsiflexor and plantarflexors depending on muscle contraction intensity
AU - Kim, Seunghyeon
AU - Son, Jongsang
AU - Yi, Changho
AU - Kim, Doosup
AU - Kim, Youngho
N1 - Funding Information:
This research was financially supported by the Ministry of Knowledge Economy (MKE) and Korea Institute for Advancement of Technology (KIAT) through the Research and Development for Regional Industry (70011192) and this study was supported by a grant of the Korean Health Technology R&D Project, Ministry of Health & Welfare, Republic of Korea. (A102062)
PY - 2013/5
Y1 - 2013/5
N2 - In this study, we investigated the pennation angles of ankle muscles as they relate to muscle contraction intensity (MCI). Eight male subjects with no history of musculoskeletal injuries participated. In each patient, the ankle joint was fixed at 15° dorsiflexion and 0°, 15° and 30° plantarflexion. Ultrasound images (SonoAce Pico, Samsung Medison, Korea) were taken to measure the pennation angle of tibialis anterior (TA), gastrocnemius medial (GCM), gastrocnemius lateral (GCL), and soleus (SOL). The torque dynamometer (Biodex system 3, Biodex Medical System, USA) was used to measure the ankle contraction intensity corresponding to 0, 30, 70 and 100% of maximum voluntary contraction (MVC) respectively. Pennation angles in ankle muscles on sub-maximal muscle contraction were determined. In the present study, the significant differences was found at between 0% of MVC and sub-maximal MVCs, between 0° and 15° of dorsiflexion, and between 15° of plantarflexion and 15° of dorsiflexion. This study may be beneficial in implementing a more realistic muscle model of muscle force.
AB - In this study, we investigated the pennation angles of ankle muscles as they relate to muscle contraction intensity (MCI). Eight male subjects with no history of musculoskeletal injuries participated. In each patient, the ankle joint was fixed at 15° dorsiflexion and 0°, 15° and 30° plantarflexion. Ultrasound images (SonoAce Pico, Samsung Medison, Korea) were taken to measure the pennation angle of tibialis anterior (TA), gastrocnemius medial (GCM), gastrocnemius lateral (GCL), and soleus (SOL). The torque dynamometer (Biodex system 3, Biodex Medical System, USA) was used to measure the ankle contraction intensity corresponding to 0, 30, 70 and 100% of maximum voluntary contraction (MVC) respectively. Pennation angles in ankle muscles on sub-maximal muscle contraction were determined. In the present study, the significant differences was found at between 0% of MVC and sub-maximal MVCs, between 0° and 15° of dorsiflexion, and between 15° of plantarflexion and 15° of dorsiflexion. This study may be beneficial in implementing a more realistic muscle model of muscle force.
KW - Major Ankle muscles
KW - Muscle contraction Intensity
KW - Pennation angle
UR - http://www.scopus.com/inward/record.url?scp=84892863519&partnerID=8YFLogxK
U2 - 10.1007/s12541-013-0112-0
DO - 10.1007/s12541-013-0112-0
M3 - Article
AN - SCOPUS:84892863519
SN - 2234-7593
VL - 14
SP - 855
EP - 858
JO - International Journal of Precision Engineering and Manufacturing
JF - International Journal of Precision Engineering and Manufacturing
IS - 5
ER -