[Antidepressant effect of ethanol extracts from three species of sect. Hypericum medicinal plants in mice].

Objective: To explore the antidepressant actions of ethanol extracts from three species of sect. Hypericum medicinal plants.

Methods: The forced swimming test and mouse tail suspensions in mice were used.

In vivo load sharing among the quadriceps components.

Knee extension is always performed with coordinated contractions of multiple quadriceps muscle components; however, how the load is shared among them under normal and pathological conditions is unclear. We hypothesized that: the absolute moment generated by each quadriceps component increases with the total knee extension moment; the relative contribution and its dependence on the total knee extension moment are different for different quadriceps components; and the centrally located large vastus intermedius (VI) is favored by the central nervous system at low levels of activation. Electrical stimulation was used to activate each quadriceps component selectively in six human subjects.

[A gait analysis system based on digital video and digital image processing].

Objective: To provide a gait analysis system.

Method: The system is composed of general video devices and personal computer hardware. The techniques of digital video and digital image processing such as template matching, sub-pixel and motion estimate etc were employed to identify and trace the markers.