The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform
Masahiro Koizumi - One of the best experts on this subject based on the ideXlab platform.
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Two mammalian species in which the Intercostal nerves innervate the serratus anterior or scalenus Muscles together with the cervical nerves: an important clue to clarify the homology of cervico-thoracic trunk Muscles in mammals
Anatomical Science International, 2019Co-Authors: Masahiro KoizumiAbstract:The levator scapulae, rhomboideus, and serratus anterior Muscles (as a group referred to the dorsal shoulder girdle Muscles) and the scalenus Muscles in mammals are usually innervated by cervical nerves. However, in koalas, the serratus anterior is additionally innervated by the lateral cutaneous branch of the first Intercostal nerve. In cats, as in some other mammalian species, a part of the scalenus Muscle (scalenus longus Muscle) is innervated by the lateral cutaneous branches of the Intercostal nerves. A precise comparison of the innervating nerves at the same segment in these two cases could clarify the homological relationship between the cervical and thoracic trunk Muscles. In this context, the aim of this study was to follow the nerve fibers included in the nerves supplying the dorsal shoulder girdle and scalenus Muscles up to the level of the spinal nerve roots in two koalas and two cats. The resultant observations revealed that both of the nerves to the serratus anterior in koalas and to the scalenus Muscles in cats from the lateral cutaneous branch of the Intercostal nerve occupy the same position in the spinal roots as the cervical nerve branches to the dorsal shoulder girdle Muscles and the thoracic nerve branches to the external Intercostal Muscle. Based on these results, the axial trunk Muscles in the cervico-thoracic region could be classified as follows: the scalenus and dorsal shoulder girdle Muscles belong to the same lateral axial trunk Muscle group as the external Intercostal Muscle, and are clearly distinguished from the medial group, such as the internal and Innermost Intercostal Muscle.
R. Felix - One of the best experts on this subject based on the ideXlab platform.
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Hochauflösende Magnetresonanztomographie (HR-MRT) von Pleura und Thoraxwand: Normalbefund und pathologische Veränderungen
Rofo-fortschritte Auf Dem Gebiet Der Rontgenstrahlen Und Der Bildgebenden Verfahren, 1995Co-Authors: R. Bittner, N. Schnoy, N. Schönfeld, A. Grassot, Robert Loddenkemper, H. Lode, D. Kaiser, D. Krumhaar, R. FelixAbstract:AIM: To determine the value of high-resolution MRI in pleural and chest wall diseases, the normal and pathologic costal pleura and adjacent chest wall between paravertebral and the axillary region were examined with contrast enhanced high-resolution T1-weighted MRI images using a surface coil. MATERIAL AND METHODS: Normal anatomy was evaluated in 5 healthy volunteers and a normal specimen of the thoracic wall, and correlation was made with corresponding HR-CT and histologic sections. CT-proved focal and diffuse changes of the pleura and the chest wall in 36 patients underwent HR-MRI, and visual comparison of MRI and CT was done retrospectively. RESULTS: Especially sagittal T1-weighted HR-MRI images allowed accurate delineation of the peripleural fat layer (PFL) and the Innermost Intercostal Muscle (IIM), which served as landmarks of the intact inner chest wall. PFL and IIM were well delineated in 3/4 patients with tuberculous pleuritis, and in all 7 patients with non-specific pleuritis, as opposed to impairment of the PFL and/or the IIM, which was detected in 15/18 malignancies as a pattern of malignant chest wall involvement. In one case of tuberculous pleural empyema with edema of the inner chest wall HR-MRI produced false positive diagnosis of malignant disease. CONCLUSION: HR-MRI images improved non-invasive evaluation of pleural and chest wall diseases, and allowed for differentiation of benign and malignant changes.
Yasuhisa Okuda - One of the best experts on this subject based on the ideXlab platform.
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Visualization of injectate spread of Intercostal nerve block: a cadaveric study
JA Clinical Reports, 2018Co-Authors: Yuichi Ohgoshi, Yosuke Usui, Satoshi Terada, Yoshimasa Takeda, Aiji Ohtsuka, Kenjiro Matsuno, Yasuhisa OkudaAbstract:Introduction Intercostal nerve block and neurolysis are widely used procedures, but their injectate spread has not been well understood. Previous studies have reported unexpected outcomes (paravertebral or epidural anesthesia) and spinal cord injury after Intercostal nerve block and neurolysis. To investigate a possible mechanism for these complications, we aimed to visualize the flow of liquid injected near the Intercostal nerve, using cadavers. Methods We performed a simulated Intercostal nerve block study using two Thiel-embalmed cadavers. Dye was injected into the interfascial plane between the internal and Innermost Intercostal Muscles under ultrasound guidance (blue, 10 ml) or under direct vision (green, 5 ml). Results Dye leakage began with injection of only 0.5–2 ml and occurred between the Innermost Intercostal Muscle fibers. The dye injected around the Intercostal nerve penetrated into the extrapleural space and reached the paravertebral space. Conclusions Injectate placed around the Intercostal nerve easily penetrate the extrapleural space and reach the paravertebral space. Intercostal nerve block or neurolysis has a risk of impairing at least the sympathetic chain and conceivably affecting the central nervous system.
R. Bittner - One of the best experts on this subject based on the ideXlab platform.
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Hochauflösende Magnetresonanztomographie (HR-MRT) von Pleura und Thoraxwand: Normalbefund und pathologische Veränderungen
Rofo-fortschritte Auf Dem Gebiet Der Rontgenstrahlen Und Der Bildgebenden Verfahren, 1995Co-Authors: R. Bittner, N. Schnoy, N. Schönfeld, A. Grassot, Robert Loddenkemper, H. Lode, D. Kaiser, D. Krumhaar, R. FelixAbstract:AIM: To determine the value of high-resolution MRI in pleural and chest wall diseases, the normal and pathologic costal pleura and adjacent chest wall between paravertebral and the axillary region were examined with contrast enhanced high-resolution T1-weighted MRI images using a surface coil. MATERIAL AND METHODS: Normal anatomy was evaluated in 5 healthy volunteers and a normal specimen of the thoracic wall, and correlation was made with corresponding HR-CT and histologic sections. CT-proved focal and diffuse changes of the pleura and the chest wall in 36 patients underwent HR-MRI, and visual comparison of MRI and CT was done retrospectively. RESULTS: Especially sagittal T1-weighted HR-MRI images allowed accurate delineation of the peripleural fat layer (PFL) and the Innermost Intercostal Muscle (IIM), which served as landmarks of the intact inner chest wall. PFL and IIM were well delineated in 3/4 patients with tuberculous pleuritis, and in all 7 patients with non-specific pleuritis, as opposed to impairment of the PFL and/or the IIM, which was detected in 15/18 malignancies as a pattern of malignant chest wall involvement. In one case of tuberculous pleural empyema with edema of the inner chest wall HR-MRI produced false positive diagnosis of malignant disease. CONCLUSION: HR-MRI images improved non-invasive evaluation of pleural and chest wall diseases, and allowed for differentiation of benign and malignant changes.
Yuichi Ohgoshi - One of the best experts on this subject based on the ideXlab platform.
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Visualization of injectate spread of Intercostal nerve block: a cadaveric study
JA Clinical Reports, 2018Co-Authors: Yuichi Ohgoshi, Yosuke Usui, Satoshi Terada, Yoshimasa Takeda, Aiji Ohtsuka, Kenjiro Matsuno, Yasuhisa OkudaAbstract:Introduction Intercostal nerve block and neurolysis are widely used procedures, but their injectate spread has not been well understood. Previous studies have reported unexpected outcomes (paravertebral or epidural anesthesia) and spinal cord injury after Intercostal nerve block and neurolysis. To investigate a possible mechanism for these complications, we aimed to visualize the flow of liquid injected near the Intercostal nerve, using cadavers. Methods We performed a simulated Intercostal nerve block study using two Thiel-embalmed cadavers. Dye was injected into the interfascial plane between the internal and Innermost Intercostal Muscles under ultrasound guidance (blue, 10 ml) or under direct vision (green, 5 ml). Results Dye leakage began with injection of only 0.5–2 ml and occurred between the Innermost Intercostal Muscle fibers. The dye injected around the Intercostal nerve penetrated into the extrapleural space and reached the paravertebral space. Conclusions Injectate placed around the Intercostal nerve easily penetrate the extrapleural space and reach the paravertebral space. Intercostal nerve block or neurolysis has a risk of impairing at least the sympathetic chain and conceivably affecting the central nervous system.