The ratio of index finger length to ring finger length (2D:4D) is considered to be a putative biomarker of prenatal androgen exposure (PAE), with previous research suggesting that 2D:4D is associated with human behaviors, especially sex-typical behaviors. This study empirically examines the relationship between 2D:4D and individual competitiveness, a behavioral trait that is found to be sexuall...

Cleft hand is an anomaly in which the primary feature is oligodactyly, and it is considered an important congenital malformation. The authors have analyzed the cases they have handled and developed an independent classification based on the number of defective digits. It has been ascertained that the clinical symptoms correlate with the number of defective digits, and a regular pattern was obse...

Anecdotal evidence suggests that a thumb and index finger grip might facilitate recovery from the manifestation of spatial disorientation known as the giant hand phenomenon. Sixteen pilots volunteered as subjects in an experiment that compared the effectiveness of the thumb and index finger versus the whole hand technique to overcome a visually-induced analogue of the giant hand phenomenon. Thu...

Hand pose and gesture recognition methods have been based on many properties of hand images, but using finger recognition is unique. Here we describe hand pose from finger recognition, its limitations and its advantages. The implementation is being used for some real applications, including interfaces and computer games, and has a success rate of over 98%

In this study, first, human hand anatomy is investigated dynamically. The tendon configuration of the fingers are also introduced and then modeled to imitate a real human hand index finger in the study because the actuating elements of the fingers are tendons on the phalanges. The prosthetic hand finger model is aimed to replace a real index finger of an amputated human. Therefore, artificial t...

OBJECTIVE Five styles of commercial static wrist extensor orthoses were compared to determine whether any style, or styles, afforded better power grip strength or finger dexterity. Because wrist extensor orthoses are intended for use during functional tasks, their influence on hand function is of great importance. METHOD Twenty-three right-hand-dominant women without upper extremity dysfuncti...

The finger print patterns (F.P.Ps.) were studied in 1120 healthy individuals of Bundelkhand region. It was found that the type of F.P.Ps. in one particular hand, is dependent upon the finger on which the pattern is manifested, and the specific print patter on the corresponding finger of the other hand. It is discussed that the phynotypical expression of F.P.P. is due to the interaction between ...

This letter presents the design, prototype and kinematic model of a new adaptive underactuated finger with an articulated skin/surface that is able to bend and, at same time, provides active rolling motion along its central axis while keeping configuration (see Fig. 1). The design based on planar chain overlapping spherical phalanxes are tendon-driven. has surface made external hollow universal...