PubMed Health⌕ Search

Biomedical subjects

W Banzer

Publications and source records attributed to W Banzer.

At least 19 recordsLinked to original sources
PubMed2003

Walking patterns of hip arthroplasty patients: some observations on the medio-lateral excursions of the trunk.

PURPOSE: This study examined the angular gait kinematics of the trunk and the pelvis in the frontal plane and their amount of side-to-side asymmetry in patients after total hip replacement arthroplasty. METHOD: The angular gait kinematics of 12 male hip arthroplasty patients (53-70 years) were compared to ten age-matched and ten young (24-35 years) male control subjects. Average step times and medio-lateral oscillation amplitudes of the pelvic and thoracic recordings were calculated for each step. Between successive steps the asymmetry ratio was computed and the mean angle around which the side-to-side oscillations occurred was compared to the angle in a symmetrical standing trial. RESULTS: ANOVA indicated no significant side differences in relative step cycle durations. Patients and senior controls had significantly (p<0.01) less pelvis side-to-side displacements than the younger controls. No significant between-group differences could be detected for the average asymmetry ratio. However, during walking the patients showed a significantly (p<0.01) increased lateral thorax and pelvis deviation. CONCLUSIONS: Hip replacement patients' thoracic and pelvic position is characterized by a lateral shift throughout the gait cycle, while left and right symmetry of angular movements amplitudes remain at about the same value of unimpaired subjects.

Aged↗
PubMed2003

Neuromuscular control of walking with chronic low-back pain.

The reported association of low-back pain and musculoskeletal disorders contributed to the examination of the lumbar spine and hip extensor activation patterns in back pain sufferers during walking. Seventeen idiopathic low-back pain male subjects and 16 healthy volunteers participated in the study. Hip joint ROMs in the sagittal plane and neuromuscular activities of erector spinae [L3, T12], gluteus maximus and biceps femoris were recorded on one randomly selected body side in each group. Analysis using the Student's t-test revealed significant differences for hip joint range of motion, stride time and significantly earlier onsets of the lumbar spine and hip extensors of the back pain sufferers compared with the healthy controls. It is assumed, that low-back disorders are related to changes of the lumbar spine and hip extensor recruitment pattern.

Adult↗
PubMed2003

[EMG analysis of shoulder muscles during preventive and therapeutic exercise in the overhead athlete].

Strengthening of the rotator cuff muscles in functional positions is one of the important demands in the prevention and rehabilitation of overhead athletes. The purpose of this study was to evaluate the influence of a new shoulder bar (SBT 1000) on the myoelectric activity of the deltoid muscle. Subjects included 12 healthy overhead athletes (control group) and 9 overhead athletes with subacromial pain syndrome (test group). Both groups performed bilateral internal and external shoulder rotations against resistance from a pulley. The position of 90 degrees abduction and elbow flexion was passively supported with the SBT 1000 and had to be actively hold without the SBT 1000. The electromyographic activity of the three heads of the deltoid was determined using surface electrodes. Rectified mean EMG data were analysed by three factor repeated measures ANOVA (group x bodyside x condition). Significant differences (p < 0,05) occurred between the conditions with and without SBT 1000 in all three heads of the deltoid. The percentage of reduction of muscle activity with the SBT 1000 in the dominant arm was 33 %, 29 % and 17 % for the anterior, middle and posterior head. No significant differences could be shown between control and test group or between the dominant and nondominant arm. With the SBT 1000 rotational shoulder exercise can be performed in a functional position with reduced involvement of the deltoid, which could be beneficial in prevention and rehabilitation of overhead athletes.

Adult↗
PubMed2002

Comparison of angular lumbar spine and pelvis kinematics during treadmill and overground locomotion.

OBJECTIVE: To determine the differences between angular oscillation curves of the lumbar spine and pelvis during walkway and treadmill ambulation. DESIGN: An in vivo observation of walking in overground and treadmill conditions. BACKGROUND: Angular movements of the lumbar spine and pelvis have been obtained during overground and treadmill walking. No data are available to indicate whether lumbar spine treadmill findings may be compared or generalized to overground readings. METHODS: Nine male subjects walked at their natural cadence along an 8 m walkway positioned over a motorized treadmill. During each of 20 walking trials, kinematic data of one full gait cycle were collected in the middle segment of the walkway. Following the overground readings the walkway was removed and treadmill recordings were taken at the subjects' preferred walking speed and at an imposed speed of 1.25 m/s. Movement patterns and maximum oscillation angles were calculated in each plane. RESULTS: Cross-correlation values of pairwise comparisons demonstrated almost comparable movement patterns between walking conditions (r > or =0.891; p<0.001) except for the movement in the sagittal plane (r=0.642, p<0.01). ANOVA for repeated measures revealed significant (p<0.05) differences in the gait cycle duration as well as reductions in oscillation amplitudes of the upper lumbar region and the pelvis in both the frontal and transverse plane during treadmill walking compared to walkway locomotion. CONCLUSIONS: Statistically significant differences exist for some angular lumbar spine movement parameters between walkway and treadmill locomotion. RELEVANCE: The observed differences between overground and treadmill locomotion should be taken in account when treadmill-based lumbar spine and pelvis kinematics want to be extended or compared to overground recordings.

Adult↗
PubMed2001

Influences of nonspecific low back pain on three-dimensional lumbar spine kinematics in locomotion.

STUDY DESIGN: A three-dimensional kinematic analysis of lumbar spinal movements with an ultrasonic measuring system was used to distinguish patients with chronic low back pain from those without such pain. OBJECTIVES: To investigate the effects of chronic low back pain on the three-dimensional movements of the lumbar spine, and to identify variables that would allow discrimination among patients with chronic low back pain and control subjects. SUMMARY OF BACKGROUND DATA: To the authors' knowledge, no previous studies have described or identified altered spinal and pelvic gait kinematics caused by nonspecific chronic low back pain in all anatomic planes. METHODS: In this study, 34 participants with chronic low back pain and 22 subjects without such pain were monitored during treadmill gait. Data from the measuring system operating at 30 Hz were low-pass filtered and normalized to a percentage of the gait cycle. RESULTS: Cross-correlations showed almost identical patterns of pelvic (S1) and thoracic (T12) movement curves in all anatomic planes between groups. No statistical group differences were detected for either pelvic or thoracic oscillation amplitudes. However, Student's t test showed significantly higher coefficients of variation (P < 0.01) in all anatomic planes of patients with chronic low back pain than in healthy control patients. CONCLUSIONS: The phasic patterns and angular spinal displacements of patients with nonspecific low back pain were shown to be within normal limits. However, the patients demonstrated higher degrees of stride-to-stride variability, representing increased fluctuations in dynamic thoracic and pelvic oscillations. These findings, resulting in less than optimal gait patterns, must be considered in the rehabilitation of patients with chronic low back pain.

Adult↗
PubMed2001

[Inline skating in school--perspectives from the sports medicine viewpoint].

INTRODUCTION: Children are motivated by new activities in physical education. Inline Skating (ILS) is one of the trend activities of the last years. For the establishment of ILS in school injury risks and the possible preventive transfer in leisure time activities are of interest. The aim of this study was to compare the incidence of injuries in an ILS-program in school with traditional activities of exercise lessons. Furthermore inline skate specific injury incidence in leisure time was evaluated. METHOD: A sample of 47 schools was evaluated by a standardized questionnaire asking for: injury incidence in traditional sports and ILS and the incidence of ILS-injuries in leisure time. RESULTS: The relative injury risk of ILS (% per 100 teaching units) is 14.3%. Basketball e.g. has an injury risk of 16.1%, handball 14.6%, gymnastics 13.9% and other games 9.5%. After the end of the ILS-program 37.3% of the students reported the incidence of an injury due to ILS in leisure time. CONCLUSION: Compared to other activities in physical education ILS shows a moderate risk of injury and may improve the acceptance of active and passive prophylaxis.

Adolescent↗
PubMed2000

[Reproducibility of lumbar spine kinematics in clinical gait analysis].

The objective measurement of functional lumbopelvical movements enables the evaluation of the quantity and quality of movements referring to functional disorders in dynamic test-situations. The goal of the present study is the determination of the reproducibility of time-continuous movement analysis of the pelvic region during walking and the determination of possible errors. The movements of the thoracic (Th12), lumbar and sacrum-region (S1) of 17 healthy subjects (age: 32.1 +/- 2.3 years) during walking on a treadmill (4.5 km/h) were investigated twice in an interval of 24 hours by means of a 3D ultrasonic movement analysis system. The ensemble averages of the low-pass filtered and time-normalized angle-time sequences of all anatomical planes and regions showed high test-retest correlations (r > or = 0.92, p < 0.01) except fo the lumbar movement in the sagittal plane (r = 0.79, p < 0.01). A paired t-test showed no significant differences for the amplitudes of test and retest measurements except for the thoracolumbar movement in the sagittal plane (p < .05). The results show that the evaluation of lumbar movement patterns can be regarded as admissible and desirable for clinical movement analysis. The data can be used as a diagnostic tool for the planning and control of therapeutic interventions.

Adult↗
PubMed1999

Measurement of lumbar spine kinematics in incline treadmill walking.

A study was undertaken to analyse and compare the pelvic (S1) and the trunk (T12) oscillations during level and uphill walking and to provide kinematic baseline data of the lumbar region in incline walking for future comparisons with pathological gait patterns. An ultrasonic movement analysis device (Zebris(R) CMS 50) was used to obtain three-dimensional kinematic data for the pelvis and thorax. Data from treadmill walking at 0 and 10% incline of 22 adults were used for within subject analysis. Crosscorrelation values ranged from r=0.76 to 0.98 (P<0.001) demonstrating a strong degree of agreement between the temporal patterns of angular displacement of the trunk and pelvis in the sagittal, transverse and frontal plane in incline compared to level ambulation. However, Student's t-tests revealed significantly (P<0.01) higher amplitudes for thorax displacements in the frontal and transverse plane in uphill walking. No significant differences were detected for amplitude parameters of the pelvis. It could be stated that the phasic patterns in level walking are not different from that obtained for incline walking. It is concluded that incline ambulation exerts the major influences in the thoracic region by increasing amplitudes of axial rotations.

Adult↗
PubMed1999

[15 years insurance statistics of incidents and accident types of combat sports injuries of the Rhineland-Pfalz Federal Sports Club].

The primary intention of this study is the grouping of sports accidents, being described by the athletes in their own words in a classification system of specific accident classes with regard to specific motions and topography. The investigation is based on the data of the sports insurance Gerling-Konzern during a 15-year period in Rhineland Palatinate (1981-1995). The study is based on the insurance documents and clinical protocols if available. 137 accident protocols were related to this 15-year period including weight lifting (n = 1) and martial arts (n = 136). Listed in hierarchical order we received the following results: judo (n = 47), karate (n = 44), wrestling (n = 22), taekwondo (n = 9), boxing (n = 7), ju-jutsu (n = 5), fencing (n = 1) and aikido (n = 1). In accordance to accident types there were no sex related differences. As special preventive measures we suggest the use of protective mouthguards and solid glasses, proprioceptive training and physiological taping for knee, ankle and elbow joints.

Accidents↗
PubMed1999

Motor performance in different dynamic tests in knee rehabilitation.

Functional dynamic tests are increasingly used in rehabilitation after injuries of the lower extremities. In these tests quantitative measures (e.g. time, height, distance) are mainly used as parameters, whereas the quality of the neuromuscular performance is poorly evaluated. In the present study the neuromuscular performance of leg muscles in different motor tasks was investigated 10-16 months after ACL-reconstruction. In 39 subjects with arthroscopically assisted ACL-reconstruction and 20 controls, isometric knee extensor strength, thigh circumference, knee stability, subjective knee function and the neuromuscular performance (by kinematic data and EMG) during three dynamic tests (stair descending, one-legged drop jump, one-legged cyclic hops) were measured. During the strength measurements a superimposed twitch technique was used for the detection of neuromuscular inhibition. The results demonstrate a significantly reduced Lysholm-Score and a distinct strength deficit, but no neuromuscular inhibition and no differences in knee stability in the operated leg. Besides reduced motor abilities of the injured leg, significant differences of the neuromuscular performance could be detected. It was evident that different test conditions revealed different persisting changes of the neuromuscular performance, which could not be detected by kinematic parameters alone.

Adult↗
PubMed1999

Diurnal variation of ECG intervals and R or T amplitudes in healthy male subjects assessed by means of spectral and cosinor analysis.

Twelve lead standard ECGs 35 healthy male volunteers, recorded from 08.00 H up to 01.00 H, were analysed retrospectively in order to investigate primarily the diurnal changes in vital sign measurements, ECG interval durations (PQ, QRS, QTc) and R wave as well as T wave amplitudes. Data were analysed descriptively and by means of ANOVA, spectral analysis and cosinor models. ANOVA revealed significant variations for vital sign parameters and the QTc interval, although remarkable variation in all ECG parameters was observed. T wave amplitudes in particular showed marked alterations, with changes up to 40%. Transient maxima of median T wave amplitudes and QTc interval duration were found at 12.00 H and 14.00 H, respectively. R wave amplitudes and PQ duration revealed lower values in the afternoon. Although there was remarkable interindividual variability, ultradian rhythmic activity of ECG parameters was confirmed by spectral analysis and cosinor models based on population data.

Adult↗
PubMed1998

[Sudden sports deaths in the armed forces of Germany].

All Soldiers are obliged to participate in sports educational programs of the services, with the exception of severe restrictions due to individual health problems. During sports activities from 1/1989 to 12/1995 7 soldiers died, 3 (i.e. 43%) during soccer games. Based on a troops strength of 370,000 men, we found a yearly incidence of 0.27 sports deaths/100,000 soldiers. This result correlates with the incidence of sports deaths of club athletes in the greatest European sports death study.

Athletic Injuries↗
PubMed1998

[Ultrasound-controlled anthropometry--on the development of a new method in asymmetry diagnosis].

UNLABELLED: Recently computer-based methods allow the registration of asymmetries in skeleton-axis. In comparison to classical methods the Ultrasound-Guided-Anthropometry (UGA) has been tested in regard to its quality criteria for representing body specific marks in three dimensions. In a sample of healthy subjects objectivity (n = 13), retest-reliability and internal validity (n = 26) have been determined. For analysis of system-quality a standardized cuboid phantom (side length 400 mm) has been measured. RESULTS: objectivity r = 0.93-0.98 (p < .05), retest-reliability r = 0.97-0.99 (p < .05) and internal validity between both methods r = 0.92-0.97 (p < .05). The analysis of system-quality produced an error in measurement of 0.65% (0.58 +/- 1.29 mm). UGA as a screening method is not a substitute for case-history or classical anthropometry, but it offers useful parameters which facilitate decision making for further diagnostic procedures.

Adult↗
PubMed1998

Spectral analysis of electroencephalography changes after choking in judo (juji-jime).

PURPOSE: The present study was carried out to investigate possible electroencephalographic changes induced by choking in judo (shime-waza) by means of spectral analysis and brain mapping. METHODS: Power spectral changes in Electroencephalography (EEG) were recorded in six experienced judoka who underwent a choking trial with a "shime-waza choking" technique called juji-jime. RESULTS: A significant increase of global field power in the delta- and theta-range occurred, while physiological alpha-power decreased. These changes in the low-frequency range reached a statistically significant level within a time span up to 20 s after choking, which was performed at an average choking time of 8 s. In no case did choking provoke neuropsychological symptoms. Yet, spectral EEG-analysis revealed subclinical changes of brain function. CONCLUSIONS: Choking in judo may induce subclinical electroencephalographic perturbations. The extent and duration can be objectified by means of spectral analysis of EEG data, global field power computation, and brain-mapping representation.

Airway Obstruction↗
PubMed1997

Dynamic testing of the motor stereotype in prone hip extension from neutral position.

OBJECTIVE: The purpose of the study was to identify a sequential activation of lumbar and hip muscles in active prone hip extension from neutral position in subjects without a history of low back pain. DESIGN: Using surface electromyography, the myoelectric activity onsets of agonistic and antagonistic hip muscles were recorded. BACKGROUND: The development of low back pain is ascribed to changes of the muscle firing order in prone hip extension. There appeared to be no normative data on muscle firing order of the lumbar and hip musculature to provide a basis for recognizing variations. METHODS: Fifteen healthy subjects performed standardized right hip extensions. Time-normalized onset of EMG activity in each muscle was measured for each trial. RESULTS: A MANOVA revealed significant (P < 0.01) differences between the activity onsets of synergistic muscles in hip extension. CONCLUSIONS: On the results it was concluded that the consistent muscle firing order of ipsilateral lumbar erector spinae, semitendinosus, contralateral lumbar erector spinae, tensor fasciae latae, and gluteus maximus demonstrate the characteristic pattern in prone hip extension. In future studies it is essential to evaluate also the hip extension pattern in functional upright conditions during gait and their relationship to spinal mechanics.

Journal Article↗
PubMed1997

Kinematic and neuromuscular changes of the gait pattern after Achilles tendon rupture.

After long immobilization periods in equinovalgus with operated Achilles tendon rupture, long-lasting changes of motor patterns in functional movement can be expected. In the present study, possible alterations in gait pattern have been analyzed based on kinematic and neuromuscular parameters. Ten patients 1 year after surgery and a healthy control group performed 10 gait cycles in natural walking cadence. Ankle motion, pressure distribution, and electromyographic data were recorded and analyzed in defined phases. Kinematic and neuromuscular changes are still evident 1 year after surgery with a temporal phase shift and a neuromuscular deficit of the lateral gastrocnemius muscle. The objective of rehabilitation should be the facilitation of the temporal innervation pattern of the lateral gastrocnemius muscle in the functional movement.

Achilles Tendon↗