Hand and Foot Detail for Biomechanical Analysis

Intricate movements of the hand and foot can now be analyzed with The MotionMonitorä  's detail hand and foot functionality.  Multiple sensors are assigned to specific bones in the foot or hand.  Anatomical landmarks are then digitized to define the dimension of each bone in the segment.  The user can specify the images and data to be displayed during real-time playback of the captured activity.  Digitizing of markers and other post processing steps are not required with The MotionMonitorä.

In the playback screen above, the right foot and shank are displayed in the Animation window of the upper left corner.  It includes the larger axes of the global coordinate system.  Three sensors attached to the Halux, Navicular, and Calcaneous are depicted  with smaller color coded axes.  In the Detail Window at the bottom, the detail image of the foot shows "tracked" bones in grey and non-tracked bones in blue.  The Data window displays a graph of the Euler rotation about the Y axes of  the Halux.  It is being displayed in the reference frame of the Navicular bone and represents flexion of the Halux relative to the mid-foot.

A similar display is depicted below for the hand.  Here the third proximal phalange is being tracked relative to the third metacarpal with flexion being in the negative direction.

The following is a list of detailed segments of the hand and foot which can be digitized.

Foot: Talus, Calcaneous, Navicular, Cuneiforms (3), Cuboid, Metatarsals and the Proximal, Middle and Distal Phalanges

Hand: Scaphoid, Lunate, Triquetal, Pisiform, Trapezium, Trapezoid, Capitate, Hamate, Metacarpals and the Proximal, Middle, and Distal Phalanges.