急性末梢前庭障害と脊髄小脳変性症における歩行運動の比較検討 Analysis of Gait in Patients with Acute Peripheral Vestibular Lesion and Spino-cerebellar Degeneration
Detailed gait analysis was performed in patients with acute peripheral vestibular lesion (N=18) and spinocerebellar degeneration (N=13), using foot switches and electromyography. Parameters used in the present study are the interval from heelstrike to forefoot strike (HA-I), interval from heel lift to forefoot lift (HA-II), stance, swing, double supporting duration (DS), and location of maximal contraction of the gastrocnemius during stance (Gc-max). Coefficient of variation (CV) was calculated from the data obtained during fifteen steps on each foot to assess the steadiness of gait. Also average time of appearance of the first and second peak of the tibialis anterior's activity which could be found between early swing and early stance, were calculated. Normal variation was set at the 2sd level obtained from 14 healthy adults. Incidence of abnormalities was highest (83%) in HA-I, which corresponds to body weight acceptance, in the peripheral lesion group, while swing showed the highest (100%) incidence of abnormality in the SCD group. In addition, the number of abnormal parameters in each case was greater in the SCD group than in the peripheral group. HA-II, which corresponds to body weight thrust, showed the lowest incidence of abnormality in both groups. Somewhat earlier appearance of the first peak of the tibialis anterior was shown in the SCD group.<BR>These differences between the two groups might reflect pathophysiological differences in the cause of gait abnormality.
- Equilibrium research
Equilibrium research 57(1), 86-89, 1998-02-01
Japan Society for Equilibrium Research