Faculty Profiles - KATAYAMA Yoshimi

Papers - KATAYAMA Yoshimi

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Effectiveness of exercise therapy on chemotherapy-induced peripheral neuropathy in patients with ovarian cancer: A scoping review

Masanori Konuma, Tomohiro Ikeda, Tomohiro Mitoma, Shinsuke Shirakawa, Jota Maki, Yoshimi Katayama, Masanori Hamada, Shoji Nagao, Toshifumi Ozaki

Gynecologic Oncology 192 155 - 162 2025.1

Association between lower limb muscle strength and musculoskeletal ambulation disability symptom complex in patients with medial meniscus posterior root tears. International journal

Mikao Fukuba, Koki Kawada, Yuki Okazaki, Yoshimi Katayama, Masanori Hamada, Toshifumi Ozaki, Takayuki Furumatsu

European journal of orthopaedic surgery & traumatology : orthopedie traumatologie 35 ( 1 ) 40 - 40 2024.12

Language：English Publishing type：Research paper (scientific journal)

PURPOSE: In this study, we aimed to evaluate the changes in and the relationship between lower limb muscle strength and physical function before and after medial meniscus posterior root (MMPR) repair. METHODS: Thirty-three patients who underwent MMPR repair were evaluated. Pain was evaluated with the numerical rating scale (NRS), and knee flexor/extensor muscle strength was assessed using a handheld dynamometer. Physical function was evaluated using a timed up and go (TUG) test. The NRS, knee flexor/extensor muscle strength, and TUG were compared preoperatively and 1 year postoperatively using the Wilcoxon signed-rank test. The correlation of patient characteristics, NRS score, knee flexor/extensor muscle strength, and preoperative TUG with the postoperative TUG was analyzed using Spearman's correlation coefficient. RESULTS: NRS (3.5 ± 2.1 to 0.1 ± 0.5 points), knee flexor strength (111.9 ± 50.2 to 146.7 ± 51.5 Nm), knee extensor strength (181.9 ± 92.8 to 256.9 ± 107.1 Nm), and TUG (12.3 ± 5.7 to 9.2 ± 2.2 s) all improved significantly from preoperatively to 1 year postoperatively (p < 0.001). The postoperative TUG was negatively correlated with the preoperative TUG (r = 0.578, p < 0.001), preoperative knee flexor muscle strength (r = - 0.355, p = 0.042), preoperative knee extensor muscle strength (r = - 0.437, p = 0.010), and postoperative knee extensor muscle strength (r = - 0.478, p = 0.004). CONCLUSION: In patients undergoing MMPR repair, surgery and rehabilitation significantly improve lower limb muscle strength and physical function. There was a significant correlation between lower limb muscle strength and TUG, and further strengthening of the lower limb muscles from the preoperative level is desirable to improve patients' physical function further. LEVEL OF EVIDENCE: IV.

DOI： 10.1007/s00590-024-04158-4

Factors Affecting Dynamic Postural Control Ability in Adolescent Idiopathic Scoliosis. Reviewed

Ryoko Yamawaki, Yoshiaki Oda, Shuhei Yamane, Koji Uotani, Haruo Misawa, Yoshimi Katayama, Masanori Hamada, Toshifumi Ozaki

Acta medica Okayama 78 ( 5 ) 357 - 362 2024.10

Language：English Publishing type：Research paper (scientific journal)

Research on postural control in patients with adolescent idiopathic scoliosis (AIS) has focused on static postural control, with few studies assessing dynamic postural control. We aimed to identify factors affecting index of postural stability (IPS), a dynamic postural control parameter, in patients with AIS. The participants comprised 50 female patients with AIS. We measured the IPS using stabilometry to evaluate dynamic postural control ability. We investigated age of the participants, major curve position (thoracic or thoracolumbar/lumbar), Cobb angle, and coronal balance. We then assessed the relationships between stabilometry parameters and other variables. IPS was analyzed with a linear regression model. Coronal balance, major curve position, and age each correlated with dynamic postural control ability. The Cobb angle showed no correlation with any of the parameters. Our results offer new insights into the assessment of postural control in patients with AIS.

DOI： 10.18926/AMO/67655

Impact of changes in skeletal muscle mass and quality during the waiting time on outcomes of lung transplantation. Reviewed International journal

Akikazu Hagiyama, Seiichiro Sugimoto, Shin Tanaka, Kei Matsubara, Kentaroh Miyoshi, Yoshimi Katayama, Masanori Hamada, Masuo Senda, Shinichi Toyooka

Clinical transplantation 38 ( 1 ) e15169 2024.1

Language：English Publishing type：Research paper (scientific journal)

INTRODUCTION: The association of changes in skeletal muscle mass and quality during the waiting time with outcomes of lung transplantation (LT) remains unclear. We aimed to examine the association of changes in skeletal muscle mass and quality during the waiting time, as well as preoperative skeletal muscle mass and quality, with outcomes of LT. METHODS: This study included individuals who underwent LT from brain-dead donors. Skeletal muscle mass (cm2 /m2 ) and quality (mean Hounsfield units [HU]) of the erector spinae muscle at the 12th thoracic level were evaluated using computed tomography. Preoperative skeletal muscle mass and quality, and their changes during the waiting time were calculated. We evaluated the associations among mechanical ventilation (MV) duration, intensive care unit (ICU) length of stay (LOS), hospital LOS, 6-minute walk distance at discharge, and 5-year survival after LT. RESULTS: This study included 98 patients. The median waiting time was 594.5 days (interquartile range [IQR], 355.0-913.0). The median changes in skeletal muscle mass and quality were -4.4% (IQR, -13.3-3.1) and -2.9% (IQR, -16.0-4.1), respectively. Severe low skeletal muscle mass at LT was associated with prolonged ICU LOS (B = 8.46, 95% confidence interval [CI]: .51-16.42) and hospital LOS (B = 36.00, 95% CI: 3.23-68.78). Pronounced decrease in skeletal muscle mass during the waiting time was associated with prolonged MV duration (B = 7.85, 95% CI: .89-14.81) and ICU LOS (B = 7.97, 95% CI: .83-15.10). CONCLUSION: Maintaining or increasing skeletal muscle mass during the waiting time would be beneficial to improve the short-term outcomes of LT.

DOI： 10.1111/ctr.15169

慢性疼痛患者の破局的思考が身体的機能と活動能力に与える影響 1年間の継時的推移の特徴

太田晴之, 齋藤圭介, 横山暁大, 堅山佳美, 濱田全紀, 鉄永倫子, 西田圭一郎, 尾崎敏文

日本運動器理学療法学会学術大会抄録集 11回 348 - 348 2023.10

Increased quadriceps muscle strength after medial meniscus posterior root repair is associated with decreased medial meniscus extrusion progression. Reviewed International journal

Koki Kawada, Takayuki Furumatsu, Mikao Fukuba, Masanori Tamura, Naohiro Higashihara, Yuki Okazaki, Yusuke Yokoyama, Yoshimi Katayama, Masanori Hamada, Toshifumi Ozaki

BMC musculoskeletal disorders 24 ( 1 ) 727 - 727 2023.9

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: This study aimed to assess quadriceps muscle strength after medial meniscus (MM) posterior root repair and determine its relationship with clinical scores and MM extrusion (MME). METHODS: Thirty patients who underwent pullout repair for MM posterior root tear and were evaluated for quadriceps muscle strength preoperatively and at 1 year postoperatively were included in this study. Quadriceps muscle strength was measured using the Locomo Scan-II instrument (ALCARE, Tokyo, Japan). MME and clinical scores (i.e., Knee Injury and Osteoarthritis Outcome Score [KOOS], International Knee Documentation Committee score, Lysholm score, Tegner score, and visual analog scale pain score) were evaluated preoperatively and at 1 year postoperatively, and second-look arthroscopy was performed at 1 year postoperatively. Wilcoxon's signed-rank test was used to compare each measure pre- and postoperatively. Pearson's correlation coefficient was used to assess the correlation with quadriceps muscle strength values. Multiple regression analysis was performed to identify factors associated with the change in MME (ΔMME). RESULTS: Second-look arthroscopy confirmed continuity of the posterior root in all patients. The quadriceps muscle strength measured at 1 year postoperatively (355.1 ± 116.2 N) indicated significant improvement relative to the quadriceps muscle strength measured preoperatively (271.9 ± 97.4 N, p < 0.001). The MME at 1 year postoperatively (4.59 ± 1.24 mm) had progressed significantly relative to the MME preoperatively (3.63 ± 1.01 mm, p < 0.001). The clinical scores at 1 year postoperatively were improved significantly relative to the scores preoperatively (p < 0.001). The postoperative quadriceps muscle strength was correlated with ΔMME (correlation coefficient = -0.398, p = 0.030), and the change in quadriceps muscle strength was correlated with the KOOS-Quality of Life (correlation coefficient = 0.430, p = 0.018). Multiple regression analysis showed that the postoperative quadriceps muscle strength had a significant effect on ΔMME even when the body mass index and time from injury to surgery were included. CONCLUSIONS: After MM posterior root repair, patients with greater quadriceps muscle strength showed less MME progression. In addition, patients with greater improvement in quadriceps muscle strength had better clinical scores; therefore, continued rehabilitation aimed at improving quadriceps muscle strength after MM posterior root repair is recommended. LEVEL OF EVIDENCE: IV.

DOI： 10.1186/s12891-023-06858-0

Effectiveness of early exercise on reducing skeletal muscle loss during preoperative neoadjuvant chemotherapy for esophageal cancer.

Tomohiro Ikeda, Kazuhiro Noma, Naoaki Maeda, Shunsuke Tanabe, Yoko Sakamoto, Yoshimi Katayama, Yasuhiro Shirakawa, Toshiyoshi Fujiwara, Masuo Senda

Surgery today 52 ( 8 ) 1143 - 1152 2022.8

Language：English Publishing type：Research paper (scientific journal)

PURPOSE: To investigate if early exercise can help prevent skeletal muscle loss and improve the clinical outcomes of esophageal cancer patients receiving preoperative neoadjuvant chemotherapy (NAC). METHODS: This was a single-center, retrospective observational cohort study of 110 patients with advanced esophageal cancer. We analyzed the effect of early exercise on the risk of skeletal muscle loss (defined as > 2.98%) during NAC and the subsequent clinical outcomes. Patients in the early exercise group (n = 71) started exercise therapy 8 days earlier than those the late exercise group (n = 39). RESULTS: The median age of the patients was 65.4 years, the mean BMI was 21.1 kg/m2, and 92 (84%) of the 110 patients were men. Skeletal muscle loss occurred in 34% and 67% of the early and late exercise groups, respectively (p < 0.001). There was a lower risk of surgical site infection in the early exercise group (1% vs 16%, p = 0.021). Multivariate analysis revealed that early exercise reduced the risk of skeletal muscle loss (OR = 0.25, 95% CI 0.09-0.65, p = 0.006). CONCLUSIONS: Our results suggest that early exercise reduces the risk of both skeletal muscle loss during NAC and subsequent surgical site infection in patients with esophageal cancer.

DOI： 10.1007/s00595-021-02449-5

Association between Overall Survival and Activities of Daily Living in Patients with Spinal Bone Metastases. International journal

Yoshiteru Akezaki, Eiji Nakata, Masato Kikuuchi, Shinsuke Sugihara, Yoshimi Katayama, Haruyoshi Katayama, Masanori Hamada, Toshifumi Ozaki

Healthcare (Basel, Switzerland) 10 ( 2 ) 2022.2

Language：English Publishing type：Research paper (scientific journal)

Objective: This study aimed to investigate the association between overall survival (OS) and activities of daily living (ADL) in patients with skeletal-related events. In this study, 265 patients whose clinical parameters were available before radiotherapy were investigated. Methods: Age, sex, ADL, pain, the primary site, spinal level of bone metastases, spinal instability, treatment strategy, including chemotherapy or palliative treatment, and OS were investigated. ADL patients with a Barthel index of ≥90 were classified as the high ADL group, while those with a score < 90 were classified as the low ADL group. For OS, patients surviving ≥160 days were classified as the non-poor prognosis group, and those who survived <160 days were classified as the poor prognosis group. Results: Age, sex, ADL, pain, the primary site, and treatment strategy for OS were different between the two groups (p < 0.1). Logistic regression analysis revealed that ADL, the primary site, and treatment strategy were significant predictors of OS (p < 0.05). High ADL, breast cancer, and chemotherapy had a positive effect on OS. Conclusions: It is suggested that improvements may be obtained by performing rehabilitation interventions to maintain and improve ADL, by constructing a system for monitoring spinal bone metastases with images before ADL decreases, and by performing interventions such as changes in treatment methods such as RT or surgery at appropriate times.

DOI： 10.3390/healthcare10020350

Factors Affecting the Quality of Life of Patients with Painful Spinal Bone Metastases. Reviewed International journal

Yoshiteru Akezaki, Eiji Nakata, Masato Kikuuchi, Shinsuke Sugihara, Yoshimi Katayama, Haruki Katayama, Masanori Hamada, Toshifumi Ozaki

Healthcare (Basel, Switzerland) 9 ( 11 ) 2021.11

Language：English Publishing type：Research paper (scientific journal)

This study examined changes in the quality of life (QOL), as well as the factors affecting QOL, among patients with painful spinal bone metastases without paralysis for 1 month after radiotherapy. METHODS: This study included 79 participants (40 male and 39 female; median age, 65 (42-88) years) who had undergone radiotherapy for painful spinal bone metastases without paralysis. Patients' age, sex, activities of daily living (Barthel index), pain, spinal instability (spinal instability neoplastic score [SINS]), and QOL (EORTC QLQ-C30) were investigated. RESULTS: Having an unstable SINS score was a positive factor for global health status (p < 0.05). The improvement in activities of daily living and response to pain were positive factors for physical function (p < 0.05). A positive effect on emotional function was confirmed among female patients (p < 0.05). CONCLUSION: Engaging in rehabilitation along with radiotherapy leads to improvements in QOL for patients with spinal bone metastases.

DOI： 10.3390/healthcare9111499

Relationship between clinical outcomes and nerve conduction studies before and after surgery in patients with carpal tunnel syndrome. Reviewed International journal

Masato Ise, Taichi Saito, Yoshimi Katayama, Ryuichi Nakahara, Yasunori Shimamura, Masanori Hamada, Masuo Senda, Toshifumi Ozaki

BMC musculoskeletal disorders 22 ( 1 ) 882 - 882 2021.10

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: Nerve conduction study (NCS) is the only useful test for objective assessment of carpal tunnel syndrome (CTS). However, the relationship between pre- and postoperative NCS and clinical outcomes was unclear. This study aimed to determine whether pre- and postoperative (6 months) NCS could predict patient-oriented and motor outcomes (6 and 12 months postoperatively) in patients with CTS. METHOD: Of the 85 patients with CTS, 107 hands were analyzed from March 2011 to March 2020. All patients underwent open carpal tunnel release and were examined using the disabilities of the arm, shoulder and hand (DASH) questionnaire and grip strength (GS) preoperatively and 6 and 12 months postoperatively. Moreover, NCS was examined preoperatively and 6 months postoperatively. Distal motor latency (DML) and sensory conduction velocity (SCV) were the parameters used for NCS. The correlation coefficient between NCS and DASH or GS was calculated. A receiver operating characteristic curve was utilized to determine the NCS threshold value to predict DASH and GS improvement. RESULTS: The average scores of GS preoperatively and 6 and 12 months postoperatively were 21.3, 22.3, and 22.8, respectively. On the other hand, the average scores of DASH preoperatively and 6 and 12 months postoperatively were 28.8, 18.3, and 12.2, respectively. The average NCS scores (DML and SCV) preoperatively/6 months postoperatively were 7.3/5.4 and 27.8/36.7, respectively. Preoperative NCS did not correlate with DASH and GS. Postoperative SCV correlated with the change in grip strength (6-12 months, r = 0.67; 0-12 months, r = 0.60) and DASH (0-12 months, r = 0.77). Moreover, postoperative DML correlated with the change in DASH (6-12 months, r = - 0.33; 0-12 months, r = - 0.59). The prediction for the improvement of GS/DASH achieved a sensitivity of 50.0%/66.7% and a specificity of 100%/100%, at an SCV cutoff score of 38.5/45.0 or above. The prediction for improvement of GS/DASH achieved a sensitivity of 83.3%/66.7% and a specificity of 100%/66.7% at a DML cutoff score of 4.4/4.4 or below. CONCLUSION: NCS at 6 months postoperatively can be used to predict the improvement of clinical outcome after 6 months postoperatively in patients with CTS.

DOI： 10.1186/s12891-021-04771-y

Prevalence of Psychological Distress and Its Risk Factors in Patients with Primary Bone and Soft Tissue Tumors. Reviewed International journal

Masato Ise, Eiji Nakata, Yoshimi Katayama, Masanori Hamada, Toshiyuki Kunisada, Tomohiro Fujiwara, Ryuichi Nakahara, Shouta Takihira, Kohei Sato, Yoshiteru Akezaki, Masuo Senda, Toshifumi Ozaki

Healthcare (Basel, Switzerland) 9 ( 5 ) 2021.5

Language：English Publishing type：Research paper (scientific journal)

Psychological distress is common in patients with soft tissue and bone tumors. We first investigated its frequency and the associated risk factors in patients with pre-operative bone and soft tissue tumors. Participants included 298 patients with bone and soft tissue tumors who underwent surgery in our institution between 2015 and 2020. Psychological distress was evaluated by the Distress and Impact Thermometer (DIT) that consists of two types of questions (questions about the severity of the patient's distress (DIT-D) and its impact (DIT-I)). We used a cut-off point of 4 on the DIT-D and 3 on the DIT-I for screening patients with psychological distress. We therefore investigated: (1) the prevalence of psychological distress as assessed with DIT or distress thermometer (DT), which can be decided by DIT-D ≥ 4, (2) what are the risk factors for the prevalence of psychological distress, and (3) what is the number of patients who consulted a psychiatrist for psychological distress in patients with pre-operative bone and soft tissue tumors. With DIT and DT, we identified 64 patients (21%) and 95 patients (32%), respectively, with psychological distress. Multivariate logistic regression revealed that older age, sex (female), malignancy (malignant or intermediate tumor), a lower Barthel Index, and higher numeric rating scale were risk factors for psychological distress. Two patients (3%) consulted a psychiatrist after surgery. In conclusion, careful attention to psychological distress is needed, especially for female patients, older patients, and those with malignant soft or bone tissue tumors who have more than moderate pain.

DOI： 10.3390/healthcare9050566

Difference between the Right and Left Phrenic Nerve Conduction Times, Latency, and Amplitude. Reviewed

Yoshimi Katayama, Masuo Senda, Daisuke Kaneda, Toshifumi Ozaki

Acta medica Okayama 72 ( 6 ) 563 - 566 2018.12

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

We studied phrenic nerve conduction times in 90 phrenic nerves of 45 normal subjects. The phrenic nerve was stimulated at the posterior border of the sternomastoid muscle in the supraclavicular fossa, just above the clavicle, with bipolar surface electrodes. For recording, positive and negative electrodes were placed on the xiphoid process and at the eighth intercostal bone-cartilage transition, respectively. We studied both the right and left sides to determine whether there was any difference between the two sides. The mean onset latency (± SD) of the right compound muscle action potentials (CMAPs) (5.99±0.39 msec) was significantly shorter than that of the left CMAPs (6.45±0.50 msec). The mean peak latency was significantly shorter in the right CMAPs (10.22±1.33 msec) than the left CMAPs (12.48±2.02 msec). The mean (± SD) amplitude was significantly lower in the left CMAPs (0.42±0.11 mV) than the right CMAPs (0.49±0.10 mV). The difference between the length of the nerve on the right and left sides might have affected the difference in latency between the two sides.

DOI： 10.18926/AMO/56373

骨折治療の最前線多発骨折・多発外傷における近年の治療戦略と変化リハビリテーション治療と関連して Reviewed

山川泰明, 野田知之, 大塚貴久, 堅山佳美, 尾崎敏文, 千田益生

Journal of Clinical Rehabilitation 27 ( 2 ) 162 - 167 2018.2

【大腿骨近位部骨折のリハビリテーション】大腿骨近位部骨折のリハビリテーションを安全に行うための工夫 Reviewed

岡佳純, 福田智美, 松山宜之, 小川加苗, 堅山佳美, 千田益生

作業療法ジャーナル 50 ( 3 ) 243 - 244 2016.3

Muscle Strength During Active Straight Leg Raising Correlates with Walking Capacity in Patients with Lumbar Spinal Canal Stenosis with Neurogenic Intermittent Claudication Reviewed

Kentaro Sasaki, Masuo Senda, Yoshimi Katayama, Haruyuki Ota

JOURNAL OF PHYSICAL THERAPY SCIENCE 23 ( 4 ) 625 - 627 2011.8

Language：English Publishing type：Research paper (scientific journal) Publisher：SOC PHYSICAL THERAPY SCIENCE

[Purpose] The purpose of this study was to investigate the factors related to walking capacity (WC) reflecting neurogenic intermittent claudication (IC). [Subjects and Methods] We selected 56 female patients (69.6 +/- 8.0 years) with Lumber Spinal Canal Stenosis (LCS) with IC. We measured WC on a flat floor, and demonstrated that 3 factors predict the relationship with IC as follows: trunk forward bending in the standing position (finger-floor distance), muscle strength during active straight leg raising (ASLR) on the symptomatic side, and the degree of subjective pain soon after standing upright for 30 s. [Results] WC and muscle strength in ASLR were not affected by age. WC was correlated with ASLR strength. [Conclusion] These results suggest that the motion of ASLR leads to canal or foraminal stenosis, and that this test will be useful for patients with LCS.

DOI： 10.1589/jpts.23.625

The effect of service dogs on the improvement of health-related quality of life. Reviewed

Mai Shintani, Masuo Senda, Tomoko Takayanagi, Yoshimi Katayama, Kazunari Furusawa, Tamami Okutani, Masaki Kataoka, Toshifumi Ozaki

Acta medica Okayama 64 ( 2 ) 109 - 13 2010.4

Language：English Publishing type：Research paper (scientific journal)

To assess the effects of service dogs on health-related quality of life (HRQOL), we conducted a survey of 10 service dog owners using SF-36v2 (Medical Outcomes Study 36 Item Short-Form Health Survey Version 2.0) and compared it with a matched control group of people with physical disabilities who did not have service dogs but were eligible for one. The scores for mental health and role emotional of service dog owners were relatively high, and their mental component summary was higher than the general population norm. These results indicate that service dogs affect the mentality of their owners. The comparison with the control group indicated that service dogs alleviate the mental burden of daily activities, and subjectively improved the physical functioning of their owners. This study showed that service dogs have positive functional and mental effects on their disabled owners.

The Change of 3 Isometric Strengths and Creatine Kinase in Serum in Patients with Stable Polymyositis

SASAKI KENTARO, SENDA MASUO, OTA HARUYUKI, KATAYAMA YOSHIMI

Journal of exercise physiology 24 ( 3 ) 439 - 443 2009.6

Language：Japanese Publisher：The Society of Physical Therapy Science

[Purpose] The aim of this study was to examine the usefulness of 3 isometric strengths (sum) in patients with polymyositis (PM) not only in the acute phase but also in the stable stage. [Subjects] Our subjects were five females (average age 36.2) with PM. [Methods] We traced the change in three isometric strengths (head up, HU; shoulder abduction; straight leg raising) measured by a hand-held dynamometer, creatine kinase level in serum (CK) and prednisone (PSL) dosage for more than 30 weeks. [Results] The change of the sum of 3 isometric strengths was correlated to CK in four patients, however, the correlation coefficient value was low. The individual strength of HU was also correlated to CK in four patients. Furthermore, HU was negatively correlated to PSL dosage in four patients though the sum strength was correlated in only three of five patients. [Conclusion] These results suggest that sequential measurement of the sum of isometric strengths would be effective for predicting the disease progress in the stable stage, though, not as much as in the acute phase. Sequential measurement of HU might be more effective for identifying the CK level or drug effect in stable stage.<br>

DOI： 10.1589/rika.24.439

Other Link： https://jlc.jst.go.jp/DN/JALC/00334289119?from=CiNii

Effect of vision on postural sway in anterior cruciate ligament injured knees. Reviewed

Kazuhiro Okuda, Nobuhiro Abe, Yoshimi Katayama, Masuo Senda, Takayuki Kuroda, Hajime Inoue

Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association 10 ( 3 ) 277 - 83 2005.5

Language：English Publishing type：Research paper (scientific journal)

Recent clinical studies have investigated postural sway characteristics in anterior cruciate ligament (ACL)-deficient knees, but the relative contributions of vision and ACL remain unclear. In the current study, we measured and compared postural sway during one-leg standing with eyes open and closed to assess the difference between legs with and without ACL injury, and we discuss the contribution of the ligament relative to vision and to postural sway in patients. We examined 32 patients (17 males, 15 females) with ACL injury before surgery from March 2001 through January 2004. None presented obvious dysfunction in the lower limbs or central nervous system. Using a gravicorder, we measured locus length per time (LG) and environmental area (AR) as the factors of postural sway during two-leg and one-leg standing with eyes open or closed. In the ACL-injured knee, the amount of postural sway increased significantly during injured leg standing with eyes closed (LG, P < 0.0001; AR, P < 0.0001), but it did not increase significantly with eyes open. There were no significant differences with respect to sex or general joint laxity. There was no correlation between postural sway and the anterior translation of the tibia measured by arthrometer KT2000 or between the muscle strength around the knee. We concluded that the amount of postural sway in the ACL-injured knee increased significantly on injured leg standing with eyes closed, and that vision appears to be dominant in compensating for the decreased contribution of the injured ACL.

特発性手根管症候群における鏡視下手根管開放術後の電気生理学的経過

濱田全紀, 堅山佳美, 千田益生, 橋詰博行, 井上一

日本手の外科学会雑誌 21 ( 3 ) 177 - 179 2004.10

Language：Japanese Publisher：(一社)日本手外科学会

手根管症候群(CTS)56例62手に鏡視下手根管開放術(ECTR)を施行し,術後電気生理学的経過について評価した.短母指外転筋M波遠位潜時(DML)及び中指-手関節間の知覚神経伝導速度(SCV)が術後12ヵ月で正常範囲であったのは,各々41.9%,46.8%であった.DMLは術後,経時的に改善していく傾向があり,術後1ヵ月,3ヵ月,6ヵ月,12ヵ月の全てで有意差があった.SCVも術後,経時的に改善していく傾向があり,術後1ヵ月,3ヵ月,6ヵ月,12ヵ月の全てで有意差が認められた

Relationship between postural balance and knee and toe muscle power in young women. Reviewed

Yoshimi Katayama, Masuo Senda, Masanori Hamada, Masaki Kataoka, Mai Shintani, Hajime Inoue

Acta medica Okayama 58 ( 4 ) 189 - 95 2004.8

Language：English Publishing type：Research paper (scientific journal)

Muscle power in the lower extremities and body sway were measured in 57 healthy young women volunteers in their 20's. Body sway was measured with a stabilimeter for 30 sec during two-leg standing, and for 10 sec during one-leg standing with the eyes open or closed, alternating between right and left legs (5 times each). The measured parameters of body sway were locus length per time unit, locus length per environmental area, environmental area, rectangle area, root mean square area, and the ratio of sway with eyes closed to sway with eyes open. Knee flexor and extensor power and toe flexor and abductor power were the measures representing lower extremity muscle power. The increase in sway with the eyes closed was more marked during one-leg standing than two-leg standing, as expected. We found that 36 of 57 subjects (62%) were unable to maintain one-leg standing with their eyes closed, and this failure correlated with marked body sway (P = 0.0086). Many subjects had one leg that was classified as stable and the other leg classified as unstable. Clearly, testing of both legs alternately with eyes closed is necessary to measure the full range of sway in subjects. Lower extremity muscle power did not appear to be the dominant factor in maintaining balance in these young subjects.

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