JaLCDOI 10.18926/AMO/32290
FullText URL fulltext.pdf
Author Kawabata, Yasuto| Senda, Masuo| Oka, Takahiro| Yagata, Yukihisa| Takahara, Yasuhiro| Nagashima, Hiroaki| Inoue, Hajime|
Abstract <p>In order to examine fatigue of the knee flexor and extensor muscles and to investigate the characteristics of muscular fatigue in different sports, a Cybex machine was used to measure muscle fatigue and recovery during isokinetic knee flexion and extension. Eighteen baseball players, 12 soccer players and 13 marathon runners were studied. Each subject was tested in the sitting position and made to perform 50 consecutive right knee bends and stretches at maximum strength. This was done 3 times with an interval of 10 min between each series. The peak torque to body weight ratio and the fatigue rate were determined in each case. In all subjects, the peak torque to body weight ratio was higher for extensors than flexors. Over the 3 trials, the fatigue rate of extensors showed little change, while that of flexors had a tendency to increase. In each subject, knee extensors showed a high fatigue rate but a quick recovery, while knee flexors showed a low fatigue rate but a slow recovery. As the marathon runners had the smallest fatigue rates for both flexors and extensors, we concluded that marathon runners had more stamina than baseball players and soccer players.</p>
Keywords knee flexor and extensor muscle fatigue Cybex machine
Amo Type Article
Published Date 2000-04
Publication Title Acta Medica Okayama
Volume volume54
Issue issue2
Publisher Okayama University Medical School
Start Page 85
End Page 90
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 10806529
Web of Science KeyUT 000086735900005
JaLCDOI 10.18926/AMO/31644
FullText URL fulltext.pdf
Author Takahiro, Hirooka| Hashizume, Hiroyuki| Senda, Masuo| Nagoshi, Mitsuru| Inoue, Hajime| Nagashima, Hiroaki|
Abstract <p>Forty-one hands of 37 patients with idiopathic carpal tunnel syndrome treated by endoscopic carpal tunnel release (ECTR) were followed up for more than one year after surgery. Surgical results were evaluated using Kelly's criteria, the Semmes-Weinstein test, the static and moving 2-point discrimination tests, tip-pinch strength, and motor and sensory nerve conduction studies. Clinical results, according to Kelly's criteria three months after surgery, were excellent or good in 36 hands, and fair or poor in five hands. No recovery was evident at six months and 12 months after surgery in fair and poor hands. Based on these findings, we conclude that a neurolysis of the median nerve and release of constriction of the thenar muscle branch should be performed using the conventional open technique for patients with poor results three months after ECTR if the patients are dissatisfied with ECTR results</p>
Keywords carpal tunnel syndrome endoscopic carpal tunnel release idiopathic
Amo Type Article
Published Date 1999-02
Publication Title Acta Medica Okayama
Volume volume53
Issue issue1
Publisher Okayama University Medical School
Start Page 39
End Page 44
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
Web of Science KeyUT 000078897700007
JaLCDOI 10.18926/AMO/31617
FullText URL fulltext.pdf
Author Senda, Masuo| Takahara, Yasuhiro| Yagata, Yukihisa| Yamamoto, Kazushi| Nagashima, Hiroaki| Tukiyama, Hisashi| Inoue, Hajime|
Abstract <p>The aim of this study was to investigate the relationship between the strength of the foot muscles that control the toes and disorders such as shin splint. In order to this, we designed and built a toe dynamometer to compare the muscle power exerted through the toes in top female marathon runners and age-matched women not involved in sports. The subjects were 12 top-level female marathon runners (Group A) and 37 student nurses who were not involved in sports (Group B). We devised a dynamometer to measure the total power exerted by the flexor muscles of the 5 toes of a single foot (total flexor power) and the combined power of the abductors of the big (1st) and little (5th) toes (abductor power). In Group A, the total flexor power was 14.3 +/- 5.3 kg in the right foot and 15.4 +/- 4.7 kg in the left foot. The abductor power was 1.9 +/- 1.8 kg in the right foot and 2.2 +/- 1.9 kg in the left foot. In Group B, total flexor power was 18.3 +/- 6.7 kg in the right foot, while the abductor power was 1.9 +/- 1.7 kg. The subjects from Group A with an arch index &#60; 1.0 (n = 8) or &#62; 1.0 (n = 4) were respectively classified as Group I and Group II. In Group I, total flexor power was 14.9 +/- 5.3 kg (right) and 15.5 +/- 5.2 kg (left), while the abductor power was 2.6 +/- 1.9 kg (right), and 3.1 +/- 1.7 kg (left). In Group II, the total flexor power was 13.2 +/- 5.8 kg (right) and 15.1 +/- 4.2 kg (left), while the abductor power was 0.7 +/- 0.6 kg (right) and 0.3 +/- 0.2 kg (left). The abductor power of toes was significantly lower in Group II than in Group I. The incidence of posteromedial shin pain was higher in Group II (75.0%) than in Group I (12.5%).</p>
Keywords toe muscle power female marathon runner toe dynamometer
Amo Type Article
Published Date 1999-08
Publication Title Acta Medica Okayama
Volume volume53
Issue issue4
Publisher Okayama University Medical School
Start Page 189
End Page 191
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 10488406
Web of Science KeyUT 000082334300005
JaLCDOI 10.18926/AMO/30792
FullText URL fulltext.pdf
Author Shigeyama, Yukio| Inoue, Hajime| Hashizume, Hiroyuki| Nagashima, Hiroaki| Senda, Masuo|
Abstract <p>Accurate assessment of elbow function is important to determine the total ability of the arm. The purpose of this study was to clarify the relationship between isometric muscle strength of the elbows of patients with rheumatoid arthritis (RA) and Larsen's X-ray evaluation. Fifty-six elbows of 45 RA patients aged 47 to 77 years (mean age, 63 years) were tested. Muscle strength was measured with an isometric torque-cell dynamometer. Test-retest reliability of the dynamometer was proven by measuring 12 elbows of 6 healthy young men. In RA patients, elbow flexion and extension strength decreased in proportion to increases in the severity of Larsen's grades from Grade 1 to 4. However, Grade 5 elbows had greater muscle strength than those in Grade 4. Forearm pronation and supination strength also decreased in proportion to increases in the severity of Larsen's grades from Grade 1 to 5. This quantitative study made it clear that the muscle strength of RA patients' elbows almost completely correlates to X-ray finding according to the grade of Larsen's evaluation based on X-rays. With regard to muscle strength of postoperative elbows, both flexion strength and supination strength after total elbow replacement (TER) were about two times greater than before TER, and after synovectomy it was as great as those in non-operative RA patients of Grade 2.</p>
Keywords elbow rheumatoid arthritis muscle strength Larsen's X-ray evaluation
Amo Type Article
Published Date 1997-10
Publication Title Acta Medica Okayama
Volume volume51
Issue issue5
Publisher Okayama University Medical School
Start Page 267
End Page 274
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 9359924
Web of Science KeyUT A1997YD65300005
JaLCDOI 10.18926/AMO/30396
FullText URL fulltext.pdf
Author Yokota, Tadaaki| Hamada, Masanori| Nagashima, Hiroaki|
Abstract <p>Seventy-six patients with ulnar neuropathy at the elbow were divided into 3 classes (Grades I, II, and III) according to their clinical features and the maximal motor nerve conduction velocity (MCV), and the amplitude ratios at the across-elbow segment were retrospectively analyzed. To determine the criteria for abnormality, a control study was conducted on 150 healthy volunteers ranging in age from 20 to 89 years (6 age groups). The normal value for MCV could be set for two age groups: those under 60 and those over 60 years old. The 95% confidence limit was 54m/s for the former and 50m/s for the latter. There was no statistically significant difference in the amplitude ratio among the age groups. The confidence limit was set uniformly at 0.82 (above elbow/below elbow). An abnormality in either MCV or the amplitude ratio was found in 66.7% of Grade I (recent and mild symptoms), 89.7% of Grade II (persistent symptoms), and 100% of Grade III cases (marked intrinsic muscle atrophy). Evaluation using the combination of MCV and the amplitude ratio, considering the age-related normal value, appeared to be useful in establishing a differential diagnosis of ulnar neuropathy at the elbow.</p>
Keywords entrapment neuropathy ulnar nerve electrodiagnosis M-wave
Amo Type Article
Published Date 1995-10
Publication Title Acta Medica Okayama
Volume volume49
Issue issue5
Publisher Okayama University Medical School
Start Page 261
End Page 265
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 8585397
Web of Science KeyUT A1995TC51800006
JaLCDOI 10.18926/AMO/30374
FullText URL fulltext.pdf
Author Kawai, Akira| Hamada, Masanori| Sugihara, Shinsuke| Hashizume, Hiroyuki| Nagashima, Hiroaki| Inoue, Hajime|
Abstract <p>The results of rotationplasty for patients with osteosarcoma around the knee joint are presented. After an average observation period of 13.3 months, there has been no local recurrence or metastasis. The ankle joints (the new knee joints) of the patients were able to support their body weight with an average range of motion of 75 degrees. All patients could walk well without crutches and without risk of the giving way phenomenon. The average rate of the functional evaluation according to the re-modified system by Enneking was 84.5% (range, 80.0-86.7%). No patient had psychological trouble in accepting the shortened and rotated extremity. The results show that rotationplasty is a useful reconstructive method for the treatment of osteosarcoma around the knee joint.</p>
Keywords rotationplasty osteosacoma reconstructive new knee joint function
Amo Type Article
Published Date 1995-08
Publication Title Acta Medica Okayama
Volume volume49
Issue issue4
Publisher Okayama University Medical School
Start Page 221
End Page 226
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language 英語
File Version publisher
Refereed True
PubMed ID 7502683
Web of Science KeyUT A1995RR97800007