Fig. 3

Representative curves of dynamic changes of cerebral blood flow velocity (CBFV) values in the non-recovery (a and b) and recovery (c and d) groups. In the recovery group before treatment, the CBFV changes from the supine to upright position were significantly higher than the healthy group (c); however, this impairment can be restored to normal after the disappearance of anxiety (d). In the non-recovery group, the CBFV changes were significantly higher than the healthy group regardless of treatment (a and b)