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Akio Minami - One of the best experts on this subject based on the ideXlab platform.
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impact of deep Extensor Muscle preserving approach on clinical outcome of laminoplasty for cervical spondylotic myelopathy comparative cohort study
European Spine Journal, 2012Co-Authors: Yoshihisa Kotani, Masahiko Takahata, Hideki Sudo, Kuniyoshi Abumi, Ken Nagahama, Akira Iwata, Akio MinamiAbstract:Introduction This study aimed to compare patients undergoing deep Extensor Muscle-preserving laminoplasty and conventional open-door laminoplasty for the treatment of cervical spondylotic myelopathy (CSM). We specifically assessed axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 3 years.
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minimum 2 year outcome of cervical laminoplasty with deep Extensor Muscle preserving approach impact on cervical spine function and quality of life
European Spine Journal, 2009Co-Authors: Yoshihisa Kotani, Shigeki Ohshima, Masahiko Takahata, Hideki Sudo, Yoshihiro Hojo, Kuniyoshi Abumi, Akio MinamiAbstract:In this retrospective cohort study, two surgical methods of conventional open-door laminoplasty and deep Extensor Muscle-preserving laminoplasty were allocated for the treatment of cervical myelopathy, and were specifically compared in terms of axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 2 years. Eighty-four patients were divided into two groups and received either a conventional open-door laminoplasty (CL group) or laminoplasty using a deep Extensor Muscle-preserving approach (MP group). The latter approach was performed by preserving multifidus and semispinalis cervicis attachments followed by open-door laminoplasty and re-suture of the bisected spinous processes at each decompression level. The average follow-up period was 38 months (25–53 months). The preoperative and follow-up evaluations included the original Japanese Orthopaedic Association (JOA) score, the new tentative JOA score including cervical spine function and QOL, and the visual analogue scale (VAS) of axial pain. Radiological analyses included cervical lordosis and flexion–extension range of motion (flex–ext ROM) (C2–7), and deep Extensor Muscle areas on MR axial images. The JOA recovery rates were statistically equivalent between two groups. The MP group demonstrated a statistically superior cervical spine function (84% vs 63%) and QOL (61% vs 45%) when compared to the CL group at final follow-up (P < 0.05). The average VAS scores at final follow-up were 2.3 and 4.9 in MP and CL groups (P < 0.05). The cervical lordosis and flex–ext ROM were statistically equivalent. The percent deep Muscle area on MRI demonstrated a significant atrophy in CL group compared to that in MP group (56% vs 88%; P < 0.01). Laminoplasty employing the deep Extensor Muscle-preserving approach appeared to be effective in reducing the axial pain and deep Muscle atrophy as well as improving cervical spine function and QOL when compared to conventional open-door laminoplasty.
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Minimum 2-year outcome of cervical laminoplasty with deep Extensor Muscle-preserving approach: impact on cervical spine function and quality of life
European Spine Journal, 2009Co-Authors: Yoshihisa Kotani, Shigeki Ohshima, Masahiko Takahata, Hideki Sudo, Yoshihiro Hojo, Kuniyoshi Abumi, Manabu Ito, Akio MinamiAbstract:In this retrospective cohort study, two surgical methods of conventional open-door laminoplasty and deep Extensor Muscle-preserving laminoplasty were allocated for the treatment of cervical myelopathy, and were specifically compared in terms of axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 2 years. Eighty-four patients were divided into two groups and received either a conventional open-door laminoplasty (CL group) or laminoplasty using a deep Extensor Muscle-preserving approach (MP group). The latter approach was performed by preserving multifidus and semispinalis cervicis attachments followed by open-door laminoplasty and re-suture of the bisected spinous processes at each decompression level. The average follow-up period was 38 months (25–53 months). The preoperative and follow-up evaluations included the original Japanese Orthopaedic Association (JOA) score, the new tentative JOA score including cervical spine function and QOL, and the visual analogue scale (VAS) of axial pain. Radiological analyses included cervical lordosis and flexion–extension range of motion (flex–ext ROM) (C2–7), and deep Extensor Muscle areas on MR axial images. The JOA recovery rates were statistically equivalent between two groups. The MP group demonstrated a statistically superior cervical spine function (84% vs 63%) and QOL (61% vs 45%) when compared to the CL group at final follow-up ( P
Edward P Snelling - One of the best experts on this subject based on the ideXlab platform.
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functional morphology of the ankle Extensor Muscle tendon units in the springhare pedetes capensis shows convergent evolution with macropods for bipedal hopping locomotion
Journal of Anatomy, 2020Co-Authors: Gabriela N Veiga, Andrew A Biewener, Edward P Snelling, Andrea Fuller, Craig P Mcgowan, Wendy PanainoAbstract:This study assesses the functional morphology of the ankle Extensor Muscle-tendon units of the springhare Pedetes capensis, an African bipedal hopping rodent, to test for convergent evolution with the Australian bipedal hopping macropods. We dissect and measure the gastrocnemius, soleus, plantaris, and flexor digitorum longus in 10 adult springhares and compare them against similar-sized macropods using phylogenetically informed scaling analyses. We show that springhares align reasonably well with macropod predictions, being statistically indistinguishable with respect to the ankle Extensor mean weighted Muscle moment arm (1.63 vs. 1.65 cm, respectively), total Muscle mass (41.1 vs. 29.2 g), total Muscle physiological cross-sectional area (22.9 vs. 19.3 cm2 ), mean peak tendon stress (26.2 vs. 35.2 MPa), mean tendon safety factor (4.7 vs. 3.6), and total tendon strain energy return capacity (1.81 vs. 1.82 J). However, total tendon cross-sectional area is significantly larger in springhares than predicted for a similar-sized macropod (0.26 vs. 0.17 cm2 , respectively), primarily due to a greater plantaris tendon thickness (0.084 vs. 0.048 cm2 ), and secondarily because the soleus Muscle-tendon unit is present in springhares but is vestigial in macropods. The overall similarities between springhares and macropods indicate that evolution has favored comparable lower hindlimb body plans for bipedal hopping locomotion in the two groups of mammals that last shared a common ancestor ~160 million years ago. The springhare's relatively thick plantaris tendon may facilitate rapid transfer of force from Muscle to skeleton, enabling fast and accelerative hopping, which could help to outpace and outmaneuver predators.
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scaling of the ankle Extensor Muscle tendon units and the biomechanical implications for bipedal hopping locomotion in the post pouch kangaroo macropus fuliginosus
Journal of Anatomy, 2017Co-Authors: Andrew A Biewener, Edward P Snelling, David A Taggart, Andrea Fuller, Duncan Mitchell, Shane K Maloney, Roger S SeymourAbstract:Bipedal hopping is used by macropods, including rat-kangaroos, wallabies and kangaroos (superfamily Macropodoidea). Interspecific scaling of the ankle Extensor Muscle-tendon units in the lower hindlimbs of these hopping bipeds shows that peak tendon stress increases disproportionately with body size. Consequently, large kangaroos store and recover more strain energy in their tendons, making hopping more efficient, but their tendons are at greater risk of rupture. This is the first intraspecific scaling analysis on the functional morphology of the ankle Extensor Muscle-tendon units (gastrocnemius, plantaris and flexor digitorum longus) in one of the largest extant species of hopping mammal, the western grey kangaroo Macropus fuliginosus (5.8–70.5 kg post-pouch body mass). The effective mechanical advantage of the ankle Extensors does not vary with post-pouch body mass, scaling with an exponent not significantly different from 0.0. Therefore, larger kangaroos balance rotational moments around the ankle by generating Muscle forces proportional to weight-related gravitational forces. Maximum force is dependent upon the physiological cross-sectional area of the Muscle, which we found scales geometrically with a mean exponent of only 0.67, rather than 1.0. Therefore, larger kangaroos are limited in their capacity to oppose large external forces around the ankle, potentially compromising fast or accelerative hopping. The strain energy return capacity of the ankle Extensor tendons increases with a mean exponent of ~1.0, which is much shallower than the exponent derived from interspecific analyses of hopping mammals (~1.4–1.9). Tendon safety factor (ratio of rupture stress to estimated peak hopping stress) is lowest in the gastrocnemius (< 2), and it decreases with body mass with an exponent of −0.15, extrapolating to a predicted rupture at 160 kg. Extinct giant kangaroos weighing 250 kg could therefore not have engaged in fast hopping using ‘scaled-up’ lower hindlimb morphology of extant western grey kangaroos.
Yoshihisa Kotani - One of the best experts on this subject based on the ideXlab platform.
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impact of deep Extensor Muscle preserving approach on clinical outcome of laminoplasty for cervical spondylotic myelopathy comparative cohort study
European Spine Journal, 2012Co-Authors: Yoshihisa Kotani, Masahiko Takahata, Hideki Sudo, Kuniyoshi Abumi, Ken Nagahama, Akira Iwata, Akio MinamiAbstract:Introduction This study aimed to compare patients undergoing deep Extensor Muscle-preserving laminoplasty and conventional open-door laminoplasty for the treatment of cervical spondylotic myelopathy (CSM). We specifically assessed axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 3 years.
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minimum 2 year outcome of cervical laminoplasty with deep Extensor Muscle preserving approach impact on cervical spine function and quality of life
European Spine Journal, 2009Co-Authors: Yoshihisa Kotani, Shigeki Ohshima, Masahiko Takahata, Hideki Sudo, Yoshihiro Hojo, Kuniyoshi Abumi, Akio MinamiAbstract:In this retrospective cohort study, two surgical methods of conventional open-door laminoplasty and deep Extensor Muscle-preserving laminoplasty were allocated for the treatment of cervical myelopathy, and were specifically compared in terms of axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 2 years. Eighty-four patients were divided into two groups and received either a conventional open-door laminoplasty (CL group) or laminoplasty using a deep Extensor Muscle-preserving approach (MP group). The latter approach was performed by preserving multifidus and semispinalis cervicis attachments followed by open-door laminoplasty and re-suture of the bisected spinous processes at each decompression level. The average follow-up period was 38 months (25–53 months). The preoperative and follow-up evaluations included the original Japanese Orthopaedic Association (JOA) score, the new tentative JOA score including cervical spine function and QOL, and the visual analogue scale (VAS) of axial pain. Radiological analyses included cervical lordosis and flexion–extension range of motion (flex–ext ROM) (C2–7), and deep Extensor Muscle areas on MR axial images. The JOA recovery rates were statistically equivalent between two groups. The MP group demonstrated a statistically superior cervical spine function (84% vs 63%) and QOL (61% vs 45%) when compared to the CL group at final follow-up (P < 0.05). The average VAS scores at final follow-up were 2.3 and 4.9 in MP and CL groups (P < 0.05). The cervical lordosis and flex–ext ROM were statistically equivalent. The percent deep Muscle area on MRI demonstrated a significant atrophy in CL group compared to that in MP group (56% vs 88%; P < 0.01). Laminoplasty employing the deep Extensor Muscle-preserving approach appeared to be effective in reducing the axial pain and deep Muscle atrophy as well as improving cervical spine function and QOL when compared to conventional open-door laminoplasty.
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Minimum 2-year outcome of cervical laminoplasty with deep Extensor Muscle-preserving approach: impact on cervical spine function and quality of life
European Spine Journal, 2009Co-Authors: Yoshihisa Kotani, Shigeki Ohshima, Masahiko Takahata, Hideki Sudo, Yoshihiro Hojo, Kuniyoshi Abumi, Manabu Ito, Akio MinamiAbstract:In this retrospective cohort study, two surgical methods of conventional open-door laminoplasty and deep Extensor Muscle-preserving laminoplasty were allocated for the treatment of cervical myelopathy, and were specifically compared in terms of axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 2 years. Eighty-four patients were divided into two groups and received either a conventional open-door laminoplasty (CL group) or laminoplasty using a deep Extensor Muscle-preserving approach (MP group). The latter approach was performed by preserving multifidus and semispinalis cervicis attachments followed by open-door laminoplasty and re-suture of the bisected spinous processes at each decompression level. The average follow-up period was 38 months (25–53 months). The preoperative and follow-up evaluations included the original Japanese Orthopaedic Association (JOA) score, the new tentative JOA score including cervical spine function and QOL, and the visual analogue scale (VAS) of axial pain. Radiological analyses included cervical lordosis and flexion–extension range of motion (flex–ext ROM) (C2–7), and deep Extensor Muscle areas on MR axial images. The JOA recovery rates were statistically equivalent between two groups. The MP group demonstrated a statistically superior cervical spine function (84% vs 63%) and QOL (61% vs 45%) when compared to the CL group at final follow-up ( P
Kuniyoshi Abumi - One of the best experts on this subject based on the ideXlab platform.
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impact of deep Extensor Muscle preserving approach on clinical outcome of laminoplasty for cervical spondylotic myelopathy comparative cohort study
European Spine Journal, 2012Co-Authors: Yoshihisa Kotani, Masahiko Takahata, Hideki Sudo, Kuniyoshi Abumi, Ken Nagahama, Akira Iwata, Akio MinamiAbstract:Introduction This study aimed to compare patients undergoing deep Extensor Muscle-preserving laminoplasty and conventional open-door laminoplasty for the treatment of cervical spondylotic myelopathy (CSM). We specifically assessed axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 3 years.
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minimum 2 year outcome of cervical laminoplasty with deep Extensor Muscle preserving approach impact on cervical spine function and quality of life
European Spine Journal, 2009Co-Authors: Yoshihisa Kotani, Shigeki Ohshima, Masahiko Takahata, Hideki Sudo, Yoshihiro Hojo, Kuniyoshi Abumi, Akio MinamiAbstract:In this retrospective cohort study, two surgical methods of conventional open-door laminoplasty and deep Extensor Muscle-preserving laminoplasty were allocated for the treatment of cervical myelopathy, and were specifically compared in terms of axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 2 years. Eighty-four patients were divided into two groups and received either a conventional open-door laminoplasty (CL group) or laminoplasty using a deep Extensor Muscle-preserving approach (MP group). The latter approach was performed by preserving multifidus and semispinalis cervicis attachments followed by open-door laminoplasty and re-suture of the bisected spinous processes at each decompression level. The average follow-up period was 38 months (25–53 months). The preoperative and follow-up evaluations included the original Japanese Orthopaedic Association (JOA) score, the new tentative JOA score including cervical spine function and QOL, and the visual analogue scale (VAS) of axial pain. Radiological analyses included cervical lordosis and flexion–extension range of motion (flex–ext ROM) (C2–7), and deep Extensor Muscle areas on MR axial images. The JOA recovery rates were statistically equivalent between two groups. The MP group demonstrated a statistically superior cervical spine function (84% vs 63%) and QOL (61% vs 45%) when compared to the CL group at final follow-up (P < 0.05). The average VAS scores at final follow-up were 2.3 and 4.9 in MP and CL groups (P < 0.05). The cervical lordosis and flex–ext ROM were statistically equivalent. The percent deep Muscle area on MRI demonstrated a significant atrophy in CL group compared to that in MP group (56% vs 88%; P < 0.01). Laminoplasty employing the deep Extensor Muscle-preserving approach appeared to be effective in reducing the axial pain and deep Muscle atrophy as well as improving cervical spine function and QOL when compared to conventional open-door laminoplasty.
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Minimum 2-year outcome of cervical laminoplasty with deep Extensor Muscle-preserving approach: impact on cervical spine function and quality of life
European Spine Journal, 2009Co-Authors: Yoshihisa Kotani, Shigeki Ohshima, Masahiko Takahata, Hideki Sudo, Yoshihiro Hojo, Kuniyoshi Abumi, Manabu Ito, Akio MinamiAbstract:In this retrospective cohort study, two surgical methods of conventional open-door laminoplasty and deep Extensor Muscle-preserving laminoplasty were allocated for the treatment of cervical myelopathy, and were specifically compared in terms of axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 2 years. Eighty-four patients were divided into two groups and received either a conventional open-door laminoplasty (CL group) or laminoplasty using a deep Extensor Muscle-preserving approach (MP group). The latter approach was performed by preserving multifidus and semispinalis cervicis attachments followed by open-door laminoplasty and re-suture of the bisected spinous processes at each decompression level. The average follow-up period was 38 months (25–53 months). The preoperative and follow-up evaluations included the original Japanese Orthopaedic Association (JOA) score, the new tentative JOA score including cervical spine function and QOL, and the visual analogue scale (VAS) of axial pain. Radiological analyses included cervical lordosis and flexion–extension range of motion (flex–ext ROM) (C2–7), and deep Extensor Muscle areas on MR axial images. The JOA recovery rates were statistically equivalent between two groups. The MP group demonstrated a statistically superior cervical spine function (84% vs 63%) and QOL (61% vs 45%) when compared to the CL group at final follow-up ( P
Masahiko Takahata - One of the best experts on this subject based on the ideXlab platform.
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impact of deep Extensor Muscle preserving approach on clinical outcome of laminoplasty for cervical spondylotic myelopathy comparative cohort study
European Spine Journal, 2012Co-Authors: Yoshihisa Kotani, Masahiko Takahata, Hideki Sudo, Kuniyoshi Abumi, Ken Nagahama, Akira Iwata, Akio MinamiAbstract:Introduction This study aimed to compare patients undergoing deep Extensor Muscle-preserving laminoplasty and conventional open-door laminoplasty for the treatment of cervical spondylotic myelopathy (CSM). We specifically assessed axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 3 years.
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minimum 2 year outcome of cervical laminoplasty with deep Extensor Muscle preserving approach impact on cervical spine function and quality of life
European Spine Journal, 2009Co-Authors: Yoshihisa Kotani, Shigeki Ohshima, Masahiko Takahata, Hideki Sudo, Yoshihiro Hojo, Kuniyoshi Abumi, Akio MinamiAbstract:In this retrospective cohort study, two surgical methods of conventional open-door laminoplasty and deep Extensor Muscle-preserving laminoplasty were allocated for the treatment of cervical myelopathy, and were specifically compared in terms of axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 2 years. Eighty-four patients were divided into two groups and received either a conventional open-door laminoplasty (CL group) or laminoplasty using a deep Extensor Muscle-preserving approach (MP group). The latter approach was performed by preserving multifidus and semispinalis cervicis attachments followed by open-door laminoplasty and re-suture of the bisected spinous processes at each decompression level. The average follow-up period was 38 months (25–53 months). The preoperative and follow-up evaluations included the original Japanese Orthopaedic Association (JOA) score, the new tentative JOA score including cervical spine function and QOL, and the visual analogue scale (VAS) of axial pain. Radiological analyses included cervical lordosis and flexion–extension range of motion (flex–ext ROM) (C2–7), and deep Extensor Muscle areas on MR axial images. The JOA recovery rates were statistically equivalent between two groups. The MP group demonstrated a statistically superior cervical spine function (84% vs 63%) and QOL (61% vs 45%) when compared to the CL group at final follow-up (P < 0.05). The average VAS scores at final follow-up were 2.3 and 4.9 in MP and CL groups (P < 0.05). The cervical lordosis and flex–ext ROM were statistically equivalent. The percent deep Muscle area on MRI demonstrated a significant atrophy in CL group compared to that in MP group (56% vs 88%; P < 0.01). Laminoplasty employing the deep Extensor Muscle-preserving approach appeared to be effective in reducing the axial pain and deep Muscle atrophy as well as improving cervical spine function and QOL when compared to conventional open-door laminoplasty.
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Minimum 2-year outcome of cervical laminoplasty with deep Extensor Muscle-preserving approach: impact on cervical spine function and quality of life
European Spine Journal, 2009Co-Authors: Yoshihisa Kotani, Shigeki Ohshima, Masahiko Takahata, Hideki Sudo, Yoshihiro Hojo, Kuniyoshi Abumi, Manabu Ito, Akio MinamiAbstract:In this retrospective cohort study, two surgical methods of conventional open-door laminoplasty and deep Extensor Muscle-preserving laminoplasty were allocated for the treatment of cervical myelopathy, and were specifically compared in terms of axial pain, cervical spine function, and quality of life (QOL) with a minimum follow-up period of 2 years. Eighty-four patients were divided into two groups and received either a conventional open-door laminoplasty (CL group) or laminoplasty using a deep Extensor Muscle-preserving approach (MP group). The latter approach was performed by preserving multifidus and semispinalis cervicis attachments followed by open-door laminoplasty and re-suture of the bisected spinous processes at each decompression level. The average follow-up period was 38 months (25–53 months). The preoperative and follow-up evaluations included the original Japanese Orthopaedic Association (JOA) score, the new tentative JOA score including cervical spine function and QOL, and the visual analogue scale (VAS) of axial pain. Radiological analyses included cervical lordosis and flexion–extension range of motion (flex–ext ROM) (C2–7), and deep Extensor Muscle areas on MR axial images. The JOA recovery rates were statistically equivalent between two groups. The MP group demonstrated a statistically superior cervical spine function (84% vs 63%) and QOL (61% vs 45%) when compared to the CL group at final follow-up ( P
