No abstract available.
Reflex Sympathetic Dystrophy* ; Reflex*

PURPOSE: Recently, analytical studies of the various parameters of rectoanal inhibitory reflex were reported and revealed that many of the parameters showed significant differences according to the anal continence function. The standardization of these studies is, however, not yet sufficient enough to apply to use those parameters in reflex test for clinical practice. The aim of this study was to check how the parameters react differently to various degrees of rectal distention and to determine the efficacy of each parameter in clinical applications of rectoanal inhibitory reflex. METHODS: Thirty-two subjects underwent repeated manometries for rectoanal inhibitory reflex with different volumes (40, 60, 80 cc) of rectal ballooning. Latencies, amplitudes, slopes, durations, and areas under the reflex curves of the reflexes were measured, and the differences among them according to the ballooning volume in each subject were analyzed statistically. RESULTS: The area under reflex curve, the amplitude, the duration, and the slope did not differ statistically with the ballooning volume (P values were 0.3959, 0.2142, 0.2080, 0.1453, respectively, by repeated measures two way ANOVA). However, the latencies did differ significantly (P=0.0131). CONCLUSIONS: Most of the parameters except latency were stable against different volumes of rectal ballooning. Among the stable parameters, the area under the reflex curve seemed to be the most useful in clinical applications of rectoanal inhibitory reflex.
Manometry ; Reflex*

No abstract available.
Reflex* ; Urination*

Measurements of ocular deviation were obtained from 45 exotropes and 31 esotropes, using Hirschberg corneal reflex test, and prism and alternate cover test respectively. The mean angle of devation in exotropes was 27.42 +/- 8.60 delta by Hirschberg test, 27.80 +/- 8.11 delta by prism and alternate cover test. There was no significant difference between these two groups (p>0.05). The mean angle of deviation in esotropes was 28.55 +/- 12.92 delta by Hirschberg test, 31.58 +/- 13.08 delta by prism and alternate cover test. The difference between these two groups was significant (p<0.05). In patients whose angle kappa was zero and exotropes whose angle kappa was positive, there was no significant diHerence between the two tests. In esotropes whose angle kappa was positive, the mean angle of deviation was 29.74 +/- 15.59 delta by Hirschberg test, and 33.47 +/- 15.91 delta by prism and alternate cover test. The difference between the two groups was significant (p Humans ; Reflex

No abstract available.
Neurons* ; Reflex*

No abstract available.
H-Reflex*

No abstract available.
H-Reflex*

No abstract available.
Angiography* ; Reflex Sympathetic Dystrophy* ; Reflex*

The vibratory inhibition index(V.I.I.) of H-reflex, H/M(mean H-reflex amplitude / mean M wave amplitude) and F/M(mean F wave amplitude / mean M wave amplitude) ratios were measured in patients of hyperreflexia with or without spasticity. These data were compared with age-matched control subjects. In comparison to normals, V.I.I. And F/M ratios were increased at statistically significant levels(versus normal : V.I.I. P<0.001, F/M p<0.005) in patient group. And V.I.I.'s were inclined to be correlated with F/M ratios without statistical significance(r=0.27, p=0.21). H /M ratios showed no significant difference between patient and control groups. In these patients, the normal significant correlation between mean F wave amplitude and M wave amplitudes was maintained(p<0.01). F/M ratios were negatively correlated with rnotor nerve conductoion velocity(r= -0.72, p<0.01).These results indicate that V.I.I. And F/M ratios increase in patients with hyperreflexia and/or spasticity. Although mechanisms differ, the data are consistent with a similar physiological responses of H-reflex and F wave to spasticity.
H-Reflex* ; Humans ; Muscle Spasticity* ; Reflex, Abnormal

OBJECTIVE: We designed this study to evaluate muscle tone by using a biomechanical method and to provide data for the future studies about muscle tone. METHOD: We evaluated 29 subjects without known neuromuscalar diseases using the biomechanical method. Both plantar flexors of each subject were passively stretched by isokinetic dynamometer from 30degrees plantar flexion position to 10degrees dorsiflexion position. Peak eccentric torque (PET) and torque threshold angle (TTA) were calculated at angular velocity of 10degrees/sec, 90degrees/sec and 300degrees/sec. Regression lines from torque/position curve at 10degrees/sec and 300degrees/sec were considered an intrinsic stiffness index (ISI) and total stiffness index (TSI). Stretch reflex threshold speed (SRTS) was defined as the minimum speed of plantar flexion movement in which EMG reflex activity in plantar flexor muscles is induced. RESULTS: The mean of TTA was higher in 10o/sec than in 300degrees/sec. The means of ISI and TSI were 0.11+/-0.08, and 0.18+/-0.04. The mean of SRTS was 125.2+/-48.3degrees. No statistical difference in each parameter was found according to the side or gender. CONCLUSION: ISI, TSI, PET, TTA and SRTS using a biomechanical method are thought to be useful parameters for the quantitative assessment of muscle tone change of ankle plantar flexors.
Ankle* ; Muscles ; Reflex ; Reflex, Stretch ; Torque