Many studies of right/left differences in motor performance related to handedness have employed tasks that use arm movements or combined arm and hand movements rather than movements of the fingers per se, the well-known exception being rhythmic finger tapping. We therefore explored four simple tasks performed on a small touchscreen with relatively isolated movements of the index finger. Each ta...

A novel category of humanoid robotic hands: COSA (Coupled and Self-Adaptive) hand is introduced in this paper. If a hand is called the COSA hand, which means that the fingers of the hand grasps objects with a special COSA grasping mode, which includes two processes, first is a coupled grasping process, then the second is a self-adaptive grasping process. The COSA grasping mode can take many adv...

Brief tactile presses stimulated the index and middle fingers of the right and left hands. The stimulation on each hand consisted of a triplet of presses. Each triplet was composed of a brief press to one finger (e.g., the middle finger), followed by a brief press to the other finger (e.g., the index finger), and by a final simultaneous press to both fingers of a given hand. With equal probabil...

Hand gesture recognition system can be used for human-computer interaction (HCI). Proper hand segmentation from the background and other body parts of the video is the primary requirement for the design of a hand-gesture based application. These video frames can be captured from a low cost webcam (camera) for use in a vision based gesture recognition technique. This paper discusses about the co...

In the daily work with finger and hand amputees, a hand and finger prosthet­ ist can clearly see which different needs can be present after a finger or partial hand amputation. The importance placed on functional and aesthetic aspects can differ not only from user to user, it also depends heavi­ ly on the clinical situation and the ex­ tent of functional and physical deficits. Especially in the...

This paper presents the mechanical design for a new five fingered, twenty degree-of-freedom dexterous hand patterned after human anatomy and actuated by Shape Memory Alloy artificial muscles. Two experimental prototypes of a finger, one fabricated by traditional means and another fabricated by rapid prototyping techniques, are described and used to evaluate the design. An important aspect of th...

Mirror movement (MM), or visible involuntary movements of a relaxed hand during voluntary fine finger movements of an activated opposite hand, can be observed in the hand that is on the unaffected side of patients with stroke. In the present study, we longitudinally examined the relationship between voluntary movement of the affected hand and MM in the unaffected hand in a single case. We repor...

Depth data acquired by current low-cost real-time depth cameras provide a more informative description of the hand pose that can be exploited for gesture recognition purposes. Following this rationale, this paper introduces a novel hand gesture recognition scheme based on depth information. The hand is firstly extracted from the acquired data and divided into palm and finger regions. Then four ...

BACKGROUND Aging is accompanied by a marked decline in muscle strength and ability to maintain steady submaximal force. Studies have shown that exercise programs can improve age-related regression of hand function in elderly individuals. The purpose of this study was to train elderly subjects to perform skilled finger movements and to evaluate the changes in hand function involving skillful use...

Figure 1. Radiographs of the left hand with an expansile lytic lesion within the midshaft of the ring finger proximal phalanx with endosteal scalloping and thinning of the surrounding cortex.