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Your search keyword '"Taiki Morisako"' showing total 2 results
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2 results on '"Taiki Morisako"'

1. Quantifying Bone Marrow Edema Adjacent to the Lumbar Vertebral Endplate on Magnetic Resonance Imaging: A Cross-Sectional Study of Patients with Degenerative Lumbar Disease

Author

Toshio Nakamae, Naosuke Kamei, Yoshinori Fujimoto, Kiyotaka Yamada, Takayuki Tamura, Yuji Tsuchikawa, Taiki Morisako, Takahiro Harada, Toshiaki Maruyama, and Nobuo Adachi

Subjects
bone marrow edema, endplate lesion, contrast ratio, low back pain, Medicine
Abstract

Study Design Cross-sectional study. Purpose We aimed to quantitatively assess bone marrow edema (BME) on magnetic resonance imaging (MRI) for patients with degenerative lumbar diseases. Overview of Literature BME adjacent to a sclerotic endplate of the lumbar spine, detected using T2-weighted fat-saturated MRI, is closely associated with low back pain in patients with degenerative lumbar diseases. However, currently, there no quantitative evaluation methods for BME adjacent to the vertebral endplate. Methods Patients with degenerative lumbar diseases, whose MRIs detected BME, were enrolled. On a T2-weighted fat-saturated MRI, BME appeared as a high-intensity region adjacent to the vertebral endplate. We calculated the contrast ratios (CRs) of BME and normal bone marrow using the signal intensities of BME, normal bone marrow, and the spinal cord. On computed tomography, we calculated Hounsfield unit (HU) values in the same area as BME, the sclerotic endplate, and normal bone marrow to assess bone density. Results There were 16 men and 14 women, with an average age of 73.5 years. The mean CRs of BME and normal bone marrow were −0.015±0.056 and −0.407±0.023, respectively. BME’s CR was significantly higher than that of normal bone marrow (p

Published
2022
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2. Comparison of the electrophysiological characteristics of tight filum terminale and tethered cord syndrome

Author

Takahiro Harada, Toshiaki Maruyama, Nobuo Adachi, Toshio Nakamae, Naosuke Kamei, Kazuyoshi Nakanishi, and Taiki Morisako

Subjects
Cauda Equina, business.industry, Neural Conduction, Anatomy, Evoked Potentials, Motor, Transcranial Magnetic Stimulation, Electrophysiology, medicine.anatomical_structure, medicine, Humans, Surgery, Neural Tube Defects, Filum terminale, Neurology (clinical), Tethered Cord, business
Abstract

This study aims to characterize tight filum terminale (TFT) in motor evoked potential (MEP) testing by comparing TFT patients with both tether cord syndrome (TCS) patients and healthy subjects. Fifty TFT patients, 18 TCS patients, and 35 healthy volunteers participated in this study. We recorded MEPs following transcranial magnetic stimulation from the bilateral abductor hallucis muscles as well as compound muscle action potentials and F-waves evoked by electrical stimulation of the tibial nerve from the bilateral abductor pollicis brevis muscles. The peripheral conduction time (PCT) was calculated from the latency of the compound action potential and F-wave. Furthermore, the central motor conduction time (CMCT) was calculated by subtracting PCT from MEP latency. TFT and TCS patients had a significantly longer MEP latency than healthy subjects. PCT in TFT patients were significantly longer than those in TCS patients or healthy subjects. Using the cut-off values for PCT, we were able to diagnose patients with TFT patients with a sensitivity of 72.0% and a specificity of 91.4%. Prolonged PCT in the MEP test may be a useful indicator for TFT and suggests that MEP may be used as an adjunct diagnostic tool for TFT.

Published
2022
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