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Article
Three-dimensional Analysis of the Muscles Related to the So-Called “Pterygomandibular Raphe”: An Anatomical and Histological Study
The pterygomandibular raphe (PMR) is a tendinous bundle between the bucinator (BM) and the superior constrictor of pharynx (SC) and has been considered essential for swallowing. Despite its functional signific...
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Article
Skeletal Muscle Complex Between the Vagina and Anal Canal: Implications for Perineal Laceration
The anatomy of the skeletal muscles located between the vagina and anus is important during complex obstetric laceration reconstructions. We aimed to clarify the composition of skeletal muscles located between...
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Article
Open AccessSignificant relationship between musculoaponeurotic attachment of the abdominal and thigh adductor muscles to the pubis: implications for the diagnosis of groin pain
Groin pain is prevalent in orthopedic and sports medicine, causing reduced mobility and limiting sports activity. To effectively manage groin pain, understanding the detailed anatomy of supporting muscles is c...
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Article
Open AccessIn vivo interrelationships between the gluteus minimus and hip joint capsule in the hip internal rotation position with flexion
The flexion adduction internal rotation (FADIR) test is performed by the combined motions of hip flexion (with knee flexion), adduction, and internal rotation, and can often reproduce anterior hip pain consist...
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Article
Open AccessOrigin, course, and distribution of the posterior femoral cutaneous nerve and the spatial relationship among its branches
This study aimed to elucidate the origin, course, and distribution of the branches of the posterior femoral cutaneous nerve, considering the segmental and dorsoventral compositions of the sacral plexus, includ...
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Article
Open AccessPosteromedial capsular anatomy of the tibia for consideration of the medial meniscal support structure using a multidimensional analysis
Medial meniscal extrusion (MME) is a structural abnormality that leads to early knee osteoarthritis; however, its formation remains debated. For anatomical consideration of the mechanism underlying MME formati...
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Article
Evaluation of morphological features of palatopharyngeus insertion into the thyroid cartilage
The attachment of the palatopharyngeus extended from the posterior end of the thyroid cartilage to the posterior margin of the inferior constrictor attachment that might contribute to successive swallowing mov...
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Article
Histological study of the thin membranous dense connective tissues around the curving portion of the bilateral recurrent laryngeal nerves
We aimed to demonstrate the anatomical relationship between the recurrent laryngeal nerves (RLNs), thin membranous dense connective tissue (TMDCT [e.g., the visceral or vascular sheaths around the esophagus]),...
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Article
Open AccessPelvic floor and perineal muscles: a dynamic coordination between skeletal and smooth muscles on pelvic floor stabilization
The purpose of this review is to present our researches on the pelvic outlet muscles, including the pelvic floor and perineal muscles, which are responsible for urinary function, defecation, sexual function, a...
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Article
Open AccessNovel combination method of wide-range serial sectioning and 3D reconstruction visualizing both macro-level dynamics and micro-level interactions in an attempt to analyze the female pelvic floor
The present report presents details of the method for combining wide-range serial sectioning and 3D reconstruction using an adult cadaver. For several decades, anatomists have utilized a variety of non-destruc...
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Article
High diagnostic accuracy of magnetic resonance imaging in detecting subscapularis tendon tears by focusing on the most superior portion of the subscapularis tendon
This study aimed to test the hypothesis that identifying the exact location of the most superior portion of the subscapularis tendon using magnetic resonance imaging (MRI) provides high diagnostic accuracy in ...
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Article
Open AccessAnatomical study for elucidating the stabilization mechanism in the trapeziometacarpal joint
To determine the pathogenesis of trapeziometacarpal (TMC) joint instability, which leads to osteoarthritis, we investigated the anatomical relationships among the surrounding ligaments, muscles (first dorsal i...
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Article
Open AccessMedial patellofemoral ligament is a part of the vastus medialis obliquus and vastus intermedius aponeuroses attaching to the medial epicondyle
This study aimed to investigate the bony surface characteristic of the femoral attachment of the medial patellofemoral ligament (MPFL) and the correlation between the relevant layered structures, including mus...
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Article
Open AccessRelease of Cervical Muscle Tension Improves Psychological Stress and Symptoms of Moderate-to-Severe Atopic Dermatitis: a Case Series with 20 Patients
Atopic dermatitis (AD) is a chronic relapsing inflammatory skin disease that is triggered by intense pruritus, impaired skin barrier function, and immune responses to allergenic substances. Break-through thera...
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Article
Open AccessSignificance of the anatomical relationship between the flexor digitorum longus and sustentaculum tali for reconsideration of the talocalcaneonavicular joint stability mechanism
The talocalcaneonavicular joint (TCN-j) is supported by the spring ligament, which has recently been revealed to be part of the joint capsule complex, along with the tendinous sheath of the tibialis posterior ...
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Article
Open AccessSignificance of the broad non-bony attachments of the anterior cruciate ligament on the tibial side
Knowledge of the anatomy of the anterior cruciate ligament (ACL) is important to understand the function and pathology of the knee joint. However, on the tibial side of ACL, its structural relationships with t...
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Article
Open AccessIn vivo magnetic resonance imaging study of the hip joint capsule in the flexion abduction external rotation position
Although the flexion abduction external rotation (FABER) test is a useful hip provocation test, hip soft tissue characteristics in the FABER position remain unclear. This study investigated the in-vivo joint caps...
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Article
Open AccessClinical anatomy of the musculoskeletal system in the hip region
Although the hip joint is regarded as inherently stable, hip pain and injuries caused by traumatic/non-traumatic hip instability are relatively common in active individuals. A comprehensive understanding of hi...
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Article
Positional relationship between the lateral border of Denonvilliers’ fascia and pelvic plexus
Denonvilliers’ fascia is an important landmark of the dissection layer during prostate or rectal surgeries. However, there are few reports on its lateral extension. This anatomical study aimed to define the la...
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Article
Open AccessSpatial distribution of loose connective tissues on the anterior hip joint capsule: a combination of cadaveric and in-vivo study
Recently, pathological changes in the fat pad on the anterior inferior iliac spine (AIIS), between the proximal rectus femoris and joint capsule, have been highlighted as a cause of anterior hip pain. However,...
