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Compression analysis of the gray and white matter of the spinal cord

Neural Regeneration Research 2020年第7期15卷 1344-1349页

作者： Norihiro Nishida Fei Jiang Junji Ohgi Akihiro Tanaka Yasuaki Imajo Hidenori Suzuki Masahiro Funaba Takashi Sakai Itsuo Sakuramoto Xian Chen Department of Orthopedic Surgery Yamaguchi University Graduate School of MedicineYamaguchiJapan Faculty of Engineering Yamaguchi UniversityYamaguchiJapan Department of Mechanical and Electrical Engineering National Institute of Technology Tokuyama CollegeYamaguchiJapan

The spinal cord is composed of gray matter and white *** is well known that the properties of these two tissues differ *** diseases often present with symptoms that are caused by spinal cord *** the mechanical properties of gray and white matter would allow us to gain a deep understanding of the injuries caused to the spinal cord and provide information on the pathological changes to these distinct tissues in several *** studies have reported on the physical properties of gray and white matter,however,these were focused on longitudinal tension *** is known about the differences between gray and white matter in terms of their response to *** therefore performed mechanical compression test of the gray and white matter of spinal cords harvested from cows and analyzed the differences between them in response to *** conducted compression testing of gray matter and white matter to detect possible differences in the collapse *** found that increased compression(especially more than 50%compression)resulted in more severe injuries to both the gray and white *** present results on the mechanical differences between gray and white matter in response to compression will be useful when interpreting findings from medical imaging in patients with spinal conditions.

关键词： biomechanical study cervical spondylotic myelopathy collapse rate compression gray matter mechanical properties spinal cord injury white matter

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Influence of Electromagnetic Fields on Bone Fracture in Rats: Role of CAPE

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Biomedical and Environmental Sciences 2009年第2期22卷 157-160页

作者： EKREM CICEK OSMAN GOKALP REMZI VAROL GOKHAN CESUR Department of Physics Faculty of Arts and ScienceMehmet Akif Ersoy UniversityBurdurTurkey Suleyman Demirel University Department of Pharmacology Suleyman Demirel University Department of Mechanical Engineering Faculty of EngineeringSuleyman Demirel University Department of Physiology Faculty of Medicine Suleyman Demirel University

Objective To study the effects of radiation emitted by mobile phones on bone strength and caffeic acid phenethyl ester （CAPE） on the changes induced by radiation. Methods Forty-eight Sprague-Dawley rats were divided into five groups. Rats in the control group （first group） were left within the experimental setup for 30 min/day for 28 days without radiation exposure. Nine hundred MHz radiation group was broke down into 2 subgroups （group 1/2）. Both subgroups were exposed to radiation for 28 days （30 min/day）. The next group was also divided into 2 subgroups （group 3/4）. Each was exposed to 1800 MHz of radiation for 28 days （30 mirdday）. The third and fifth groups were also treated with CAPE for 28 days. Treatment groups received ip caffeic acid phenethyl ester （10 ktmol/kg per day） before radiation session. Bone fracture was analyzed. Results Breaking force, bending strength, and total fracture energy decreased in the irradiated groups but increased in the treatment groups. Conclusion Radiation and CAPE can significantly improve bone.

关键词： Mobile phone biomechanical study Caffeic acid phenethyl ester

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