In order to improve the life quality of amputees, providing approximate manipulation ability of a human hand to that of a prosthetic hand is considered by many researchers. In this study, a biomechanical model of the index finger of the human hand is developed based on the human anatomy. Since the activation of finger bones are carried out by tendons, a tendon configuration of the index finger ...

Although tactile representations of the two body sides are initially segregated into opposite hemispheres of the brain, behavioural interactions between body sides exist and can be revealed under conditions of tactile double simultaneous stimulation (DSS) at the hands. Here we examined to what extent vision can affect body side segregation in touch. To this aim, we changed hand-related visual i...

There is much documented information on abnormal fingernail shapes- acquired or congenital. There is a dearth of information on the shapes of the clinically healthy fingernail in medical textbooks and scientific journals. A study was carried out to determine the possible shapes of the healthy fingernails and the prevalence of each shape in the locality, i.e. in Ibadan, south-western Nigeria and...

PURPOSE The aim of this study is to analyse the grip force distribution for different prosthetic hand designs and the human hand fulfilling a functional task. METHOD A cylindrical object is held with a power grasp and the contact forces are measured at 20 defined positions. The distributions of contact forces in standard electric prostheses, in a experimental prosthesis with an adaptive grasp...

In this paper we introduce a newly developed high-speed multi-fingered robotic hand. The hand has 8joints and 3-fingers. A newly developed small harmonic drive gear and a high-power mini actuator are fitted in each finger link, and a strain gauge sensor is in each joint. The weight of the hand module is only 0.8kg, but high-speed motion and high-power grasping are possible. The hand can close i...

BACKGROUND Current examination methods to assess the anatomical variations of flexor digitorum superficialis (FDS) tendon in the little finger necessitate a strong external force applied by the examiner and cause false negatives. A new examination method was designed to detect the variations more accurately. METHODS We examined the little fingers of 220 adult hands (110 subjects) by 2 methods...

In this paper, we propose a logical and procedural way to recognize hand finger with relative positioning. This relative position of hand finger will help us to identify and recognize hundreds of unique gestures boosting the result of current state of the art approaches by the means of gesture count. The proposed method uses a color based segmentation to identify skin area from image frames and...

Abslrael-In this paper we introduce 8 newly developed high-speed multi-fingered robotic hand. The hand has 8joints and 3-fingen. A newly developed small harmonic drive gear and a high-power mini actuator are fitted in each finger link, and a strain gauge sensor is in each joint. The weight of the hand module is only 0.8kg, hut high-speed motion and high-power grasping are possible. The hand can...

Injection of muscimol (GABA agonist) in the finger region of area 2 of the alert monkey led to the striking yet reversible loss of finger coordination, thus disabling the monkey from picking up a small piece of food from a small hole or a funnel. Symptoms varied depending on sites of injection within the finger region. Neither weakness of hand or finger movements nor deficit in hand reach was o...