The Experts below are selected from a list of 87 Experts worldwide ranked by ideXlab platform
Ikuo Kageyama - One of the best experts on this subject based on the ideXlab platform.
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Morphological characteristics of the Plantar calcaneocuboid Ligaments
Journal of Foot and Ankle Research, 2021Co-Authors: Mutsuaki Edama, Tomoya Takabayashi, Hirotake Yokota, Ryo Hrabayashi, Chie Sekine, Ikuo KageyamaAbstract:Background The aim of this study was to clarify the differences in morphological features between the Long Plantar Ligament (LPL) and the short Plantar Ligament (SPL). Methods This investigation examined 50 legs from 25 Japanese cadavers. The LPL and SPL of each leg were classified into one of three types based on the shape and number of fiber bundles. Then, fiber bundle length, fiber bundle width, and fiber bundle thickness were measured. Results The LPL was rectangular in shape (Type I) in 12%, hourglass shape (Type II) in 62%, and triangular in shape (Type III) in 26%. The SPL was a single fiber bundle (Type I-a) in 26%, a surface fiber bundle and a deep fiber bundle (Type I-b) in 60%, and a surface fiber bundle (medial and lateral) and a deep fiber bundle (Type II) in 14%. Regarding the morphological characteristics, there were no significant differences among the types in the LPL, but there were differences between types and between surface and deep fiber bundles in the SPL. Conclusions For the LPL, the hourglass shape is the most common type. However, there appeared to be no functional difference due to the difference in the shape of the LPL, since there were no significant differences among the types in the LPL. For the SPL, there were types of single, double and triple fiber bundles; there may be functional differences based on the number of fiber bundles and between superficial and deep fibers.
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Morphological Characteristics of the Plantar Calcaneocuboid Ligaments
2020Co-Authors: Mutsuaki Edama, Tomoya Takabayashi, Hirotake Yokota, Chie Sekine, Ryo Hirabayashi, Ikuo KageyamaAbstract:Abstract Background: The aim of this study was to clarify the differences in morphological features based on differences in the shape and number of the Long Plantar Ligament (LPL) and the short Plantar Ligament (SPL).Methods: This investigation examined 50 legs from 25 Japanese cadavers. The LPL and SPL of each leg were classified into one of three types based on the shape and number of fiber bundles. Then, fiber bundle length, fiber bundle width, and fiber bundle thickness were measured.Results: The LPL was rectangular in shape (Type I) in 12%, hourglass shape (Type II) in 62%, and triangular in shape (Type III) in 26%. The SPL was a single fiber bundle (Type I-a) in 26%, a surface fiber bundle and a deep fiber bundle (Type I-b) in 60%, and a surface fiber bundle (medial and lateral) and a deep fiber bundle (Type II) in 14%. Regarding the morphological characteristics, there were no significant differences among the types in the LPL, but there were differences between types and between surface and deep fiber bundles in the SPL.Conclusions: For the LPL, the hourglass shape is the most common type. However, there appeared to be no functional difference due to the difference in the shape of the LPL, since there were no significant differences among the types in the LPL. For the SPL, there were types of single, double and triple fiber bundles; there may be functional differences based on the number of fiber bundles and between superficial and deep fibers.
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Morphological features of the lateral Plantar Ligament of the transverse metatarsal arch.
Clinical anatomy (New York N.Y.), 2020Co-Authors: Mutsuaki Edama, Tomoya Takabayashi, Hirotake Yokota, Chie Sekine, Ryo Hirabayashi, Takuma Inai, Kanta Matsuzawa, Tomofumi Otsuki, Sae Maruyama, Ikuo KageyamaAbstract:The aim of this study was to elucidate the morphological characteristics of the lateral Lisfranc Ligament in a large sample. This investigation examined 100 legs from 50 cadavers. Each of the lower limbs was dissected to identify the Plantar aspect of the transverse metatarsal arch, and morphological characteristics of the lateral Plantar Ligament were assessed, including the length, width, and thickness of the fiber bundles. The majority of Plantar Ligaments originated from the base of M5 and the Plantar aspect of the lateral cuneiform (LC). The lateral Plantar Ligament could be classified into three types: Type I, a band-like fiber bundle originating from the base of M5 to the LC (41%); Type II, originating from the base of M5 and the Plantar aspect of LC and mostly connected the blending the fiber bundles of the tibialis posterior (TP) and Long Plantar Ligament (LPL) (21%); and Type III, with no Ligaments originating from the base of M5 and Plantar aspect of the LC (38%). The morphological characteristics of Type I lateral Plantar Ligament were as follows: length, 31.8 ± 3.7 mm; width, 2.3 ± 1.0 mm; and thickness, 0.2 ± 0.3 mm. The morphology of the lateral Plantar Ligament showed variation, originating from the base of M5 and the Plantar aspect of LC most commonly, but this was not the case in 38% of limbs. The findings suggest that the lateral Plantar Ligament might play a role in the transverse tarsal arch, indicating a cooperative mechanism with the TP and LPL.
Mutsuaki Edama - One of the best experts on this subject based on the ideXlab platform.
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Morphological characteristics of the Plantar calcaneocuboid Ligaments
Journal of Foot and Ankle Research, 2021Co-Authors: Mutsuaki Edama, Tomoya Takabayashi, Hirotake Yokota, Ryo Hrabayashi, Chie Sekine, Ikuo KageyamaAbstract:Background The aim of this study was to clarify the differences in morphological features between the Long Plantar Ligament (LPL) and the short Plantar Ligament (SPL). Methods This investigation examined 50 legs from 25 Japanese cadavers. The LPL and SPL of each leg were classified into one of three types based on the shape and number of fiber bundles. Then, fiber bundle length, fiber bundle width, and fiber bundle thickness were measured. Results The LPL was rectangular in shape (Type I) in 12%, hourglass shape (Type II) in 62%, and triangular in shape (Type III) in 26%. The SPL was a single fiber bundle (Type I-a) in 26%, a surface fiber bundle and a deep fiber bundle (Type I-b) in 60%, and a surface fiber bundle (medial and lateral) and a deep fiber bundle (Type II) in 14%. Regarding the morphological characteristics, there were no significant differences among the types in the LPL, but there were differences between types and between surface and deep fiber bundles in the SPL. Conclusions For the LPL, the hourglass shape is the most common type. However, there appeared to be no functional difference due to the difference in the shape of the LPL, since there were no significant differences among the types in the LPL. For the SPL, there were types of single, double and triple fiber bundles; there may be functional differences based on the number of fiber bundles and between superficial and deep fibers.
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Morphological Characteristics of the Plantar Calcaneocuboid Ligaments
2020Co-Authors: Mutsuaki Edama, Tomoya Takabayashi, Hirotake Yokota, Chie Sekine, Ryo Hirabayashi, Ikuo KageyamaAbstract:Abstract Background: The aim of this study was to clarify the differences in morphological features based on differences in the shape and number of the Long Plantar Ligament (LPL) and the short Plantar Ligament (SPL).Methods: This investigation examined 50 legs from 25 Japanese cadavers. The LPL and SPL of each leg were classified into one of three types based on the shape and number of fiber bundles. Then, fiber bundle length, fiber bundle width, and fiber bundle thickness were measured.Results: The LPL was rectangular in shape (Type I) in 12%, hourglass shape (Type II) in 62%, and triangular in shape (Type III) in 26%. The SPL was a single fiber bundle (Type I-a) in 26%, a surface fiber bundle and a deep fiber bundle (Type I-b) in 60%, and a surface fiber bundle (medial and lateral) and a deep fiber bundle (Type II) in 14%. Regarding the morphological characteristics, there were no significant differences among the types in the LPL, but there were differences between types and between surface and deep fiber bundles in the SPL.Conclusions: For the LPL, the hourglass shape is the most common type. However, there appeared to be no functional difference due to the difference in the shape of the LPL, since there were no significant differences among the types in the LPL. For the SPL, there were types of single, double and triple fiber bundles; there may be functional differences based on the number of fiber bundles and between superficial and deep fibers.
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Morphological features of the lateral Plantar Ligament of the transverse metatarsal arch.
Clinical anatomy (New York N.Y.), 2020Co-Authors: Mutsuaki Edama, Tomoya Takabayashi, Hirotake Yokota, Chie Sekine, Ryo Hirabayashi, Takuma Inai, Kanta Matsuzawa, Tomofumi Otsuki, Sae Maruyama, Ikuo KageyamaAbstract:The aim of this study was to elucidate the morphological characteristics of the lateral Lisfranc Ligament in a large sample. This investigation examined 100 legs from 50 cadavers. Each of the lower limbs was dissected to identify the Plantar aspect of the transverse metatarsal arch, and morphological characteristics of the lateral Plantar Ligament were assessed, including the length, width, and thickness of the fiber bundles. The majority of Plantar Ligaments originated from the base of M5 and the Plantar aspect of the lateral cuneiform (LC). The lateral Plantar Ligament could be classified into three types: Type I, a band-like fiber bundle originating from the base of M5 to the LC (41%); Type II, originating from the base of M5 and the Plantar aspect of LC and mostly connected the blending the fiber bundles of the tibialis posterior (TP) and Long Plantar Ligament (LPL) (21%); and Type III, with no Ligaments originating from the base of M5 and Plantar aspect of the LC (38%). The morphological characteristics of Type I lateral Plantar Ligament were as follows: length, 31.8 ± 3.7 mm; width, 2.3 ± 1.0 mm; and thickness, 0.2 ± 0.3 mm. The morphology of the lateral Plantar Ligament showed variation, originating from the base of M5 and the Plantar aspect of LC most commonly, but this was not the case in 38% of limbs. The findings suggest that the lateral Plantar Ligament might play a role in the transverse tarsal arch, indicating a cooperative mechanism with the TP and LPL.
Usama Hagag - One of the best experts on this subject based on the ideXlab platform.
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Magnetic resonance imaging of the normal dromedary camel tarsus
BMC Veterinary Research, 2021Co-Authors: Zakriya Ali Al Mohamad, Usama Hagag, Mohamed Gomaa Tawfiek, Ayman El NahasAbstract:Background Magnetic resonance imaging (MRI) is the most versatile and informative imaging modality for the diagnosis of locomotor injuries in many animal species; however, veterinary literature describing the MRI of the dromedary camel tarsus is lacking. Our purpose was to describe and compare the MRI images of twelve cadaveric tarsi, examined in a 1.5 Tesla MRI scanner, with their corresponding anatomical gross sections. Turbo spin-echo (TSE) T1-weighted (T1), T2-weighted (T2), proton density-weighted (PD), and short tau inversion recovery (STIR) sequences were obtained in 3 planes. Tarsi were sectioned in sagittal, dorsal, and transverse planes. MRI images from different sequences and planes were described and compared with the anatomical sections. Results The soft and osseous tissues of the dromedary camel tarsus could be clearly defined on MRI images and corresponded extensively with the gross anatomic sections. The obtained MRI images enabled comprehensive assessment of the anatomic relationships among the osseous and soft tissues of the camel tarsus. Several structure were evaluated that cannot be imaged using radiography or ultrasonography, including the transverse inter-tarsal Ligaments, the talocalcaneal Ligament, the short dorsal Ligament, branches of the short medial and lateral collateral Ligaments and the tarsometatarsal Ligaments. Specific anatomical features regarding the dromedary camel tarsus were identified, including the fused second and third tarsal bone, an additional bundle of the short medial collateral Ligament connecting the talus and metatarsus and the medial and lateral limbs of the Long Plantar Ligament. Conclusions MRI images provided a thorough evaluation of the normal dromedary camel tarsus. Information provided in the current study is expected to serve as a basis for interpretation in clinical situations.
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Magnetic resonance imaging of the normal dromedary camel tarsus
2020Co-Authors: Usama Hagag, Mohamed Gomaa Tawfiek, Zakriya Ali Almohamad, Ayman El NahasAbstract:Abstract Background: Magnetic resonance imaging (MRI) is the most versatile and informative imaging modality for the diagnosis of locomotor injuries in many animal species; however, veterinary literature describing the MRI of the dromedary camel tarsus is lacking. Our purpose was to describe and compare the MRI images of twelve cadaveric tarsi, examined in a 1.5 Tesla MRI scanner, with their corresponding anatomical gross sections. Turbo spin-echo (TSE) T1-weighted (T1), T2-weighted (T2), proton density-weighted (PD), and short tau inversion recovery (STIR) sequences were obtained in 3 planes. Tarsi were sectioned in sagittal, dorsal, and transverse planes. MRI images from different sequences and planes were described and compared with the anatomical sections.Results: The soft and osseous tissues of the dromedary camel tarsus corresponded extensively with the gross anatomic sections. T1 and PD images provided high anatomical details and the synovial fluid had high signal intensity on T2, PD, and STIR sequences and intermediate signal intensity on T1 images. The tibial cochlea, tarsal bones, and the proximal metatarsus were evaluated in all planes. The sagittal and dorsal images were useful for the evaluation of articular cartilage and subchondral bone. Articular cartilage had homogenous intermediate signal intensity on the T1 images and low signal intensity on the T2 and PD images. The Subchondral and cortical bone had low signal intensity on all sequences, and the cancellous bone expressed heterogeneous signal intensity on PD, T1, and T2 images. The tarsal tendons and Ligaments had low signal intensity in all sequences including: the tendons of fibularis tertius, Long digital extensor, cranial tibial, fibularis Longus, lateral digital extensor muscles; the common tendon of the caudal tibial and lateral digital flexor muscles; the medial digital flexor tendon; the Long and short bundles of the medial and lateral collateral Ligaments; the superficial and deep digital flexor tendons; and the Long Plantar Ligament. Conclusions: MRI images provided a thorough evaluation of the normal dromedary camel tarsus. Information provided in the current study is expected to serve as a basis for interpretation in clinical situations.
Ayman El Nahas - One of the best experts on this subject based on the ideXlab platform.
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Magnetic resonance imaging of the normal dromedary camel tarsus
BMC Veterinary Research, 2021Co-Authors: Zakriya Ali Al Mohamad, Usama Hagag, Mohamed Gomaa Tawfiek, Ayman El NahasAbstract:Background Magnetic resonance imaging (MRI) is the most versatile and informative imaging modality for the diagnosis of locomotor injuries in many animal species; however, veterinary literature describing the MRI of the dromedary camel tarsus is lacking. Our purpose was to describe and compare the MRI images of twelve cadaveric tarsi, examined in a 1.5 Tesla MRI scanner, with their corresponding anatomical gross sections. Turbo spin-echo (TSE) T1-weighted (T1), T2-weighted (T2), proton density-weighted (PD), and short tau inversion recovery (STIR) sequences were obtained in 3 planes. Tarsi were sectioned in sagittal, dorsal, and transverse planes. MRI images from different sequences and planes were described and compared with the anatomical sections. Results The soft and osseous tissues of the dromedary camel tarsus could be clearly defined on MRI images and corresponded extensively with the gross anatomic sections. The obtained MRI images enabled comprehensive assessment of the anatomic relationships among the osseous and soft tissues of the camel tarsus. Several structure were evaluated that cannot be imaged using radiography or ultrasonography, including the transverse inter-tarsal Ligaments, the talocalcaneal Ligament, the short dorsal Ligament, branches of the short medial and lateral collateral Ligaments and the tarsometatarsal Ligaments. Specific anatomical features regarding the dromedary camel tarsus were identified, including the fused second and third tarsal bone, an additional bundle of the short medial collateral Ligament connecting the talus and metatarsus and the medial and lateral limbs of the Long Plantar Ligament. Conclusions MRI images provided a thorough evaluation of the normal dromedary camel tarsus. Information provided in the current study is expected to serve as a basis for interpretation in clinical situations.
Andrew Molloy - One of the best experts on this subject based on the ideXlab platform.
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Anatomy of the Lateral Plantar Ligaments of the Transverse Metatarsal Arch
Foot & Ankle Orthopaedics, 2018Co-Authors: Lyndon Mason, Lara Jayatilaka, Lauren Fisher, Andrew Fisher, Eric Swanton, Andrew MolloyAbstract:Category: Midfoot/Forefoot Introduction/Purpose: The anatomy of the Lisfranc complex is well understood. In contrast, the lateral tarsometatarsal Ligamentous structures are under-investigated. Our study aimed to identify the Plantar Ligamentous structures of the lateral tarsometatarsal joints and their significance in transverse metatarsal arch injuries. Methods: We examined 10 cadaveric lower limbs that had been preserved for dissection at the Human Anatomy and Resource Centre at Liverpool University in a solution of formaldehyde. The lower limbs were carefully dissected to identify the Ligamentous structures of the Plantar aspect of the transverse metatarsal arch. Results: In all specimens, the Long Plantar Ligament blended with a transverse metatarsal Ligament spanning from the 2nd to the 5th metatarsal. This transverse metatarsal Ligament formed the basis of the roof and distal aspect of the peroneus Longus canal. The separate Long Plantar Ligament formed the floor of the peroneus Longus canal. In addition, separate intermetarsal Ligaments were identifiable connecting each metatarsal. The Long Plantar Ligament provides a connection through the transverse metatarsal Ligament, connecting the transverse and Longitudinal arches of the foot Conclusion: The Plantar Ligamentous structures of the lateral tarsometatarsal joints are a combination of individual intermetatarsal Ligaments and a transverse metatarsal Ligament. This explains the homogenous nature of a divergent tarsometatarsal joint injury and why middle and lateral columns move as one. It also has clinical significance in the observation that in some cases lateral column instability can be overcome when the middle column is stabilised.
