The mechatronic design of robotic hands is a very complex task, which involves different aspects of mechanics, actuation, and control. In most of cases inspiration is taken by the human hand, which is able to grasp and manipulate objects with different sizes and shapes, but its functionality and versatility are very difficult to mimic. Human hand strength and dexterity involve a complex geometr...

Vitamin B12 deficiency results in hematological, neurological, and rarely dermatological complications. Subacute combined degeneration of the cord is one of the neurological complications, and usually the presenting symptom is paresthesia. Herein, we report a case of a 46-year-old man with subacute combined degeneration presenting with knuckle hyperpigmentation.

Pitch perception is an important component of hearing, allowing us to appreciate melodies and harmonies as well as recognize prosodic cues in speech. Multiple studies over the last decade have suggested that pitch is represented by a pitch-processing center in auditory cortex. However, recent data (Barker D, Plack CJ, Hall DA. Cereb Cortex. In press; Hall DA, Plack CJ. Cereb Cortex 19: 576-585,...

Bone is capable of adapting during life in response to stress. Therefore, variation in locomotor and manipulative behaviours across extant hominoids may be reflected in differences in trabecular bone structure. The hand is a promising region for trabecular analysis, as it is the direct contact between the individual and the environment and joint positions at peak loading vary amongst extant hom...

The main aim of the present paper is to assess fatigue lifetime ductile cast iron knuckles as one critical components an automotive steering system. To this end, a real driving path, including various maneuvers, such acceleration, braking, cornering, and moving on types road roughness, was considered. Different load histories, which are applied joints component (i.e., lower control arm, linkage...

We report on a 22-year-old male patient and his father, both presenting with congenital sensorineural deafness, diffuse palmoplantar keratoderma and knuckle pads. These findings are similar to those previously described in the Bart-Pumphrey syndrome, a rare autosomal dominant disorder. Several conditions including keratoderma and deafness are briefly reviewed.

Fusion between the os centrale and the scaphoid has played a central role in many functional and phylogenetic interpretations of hominoid evolution. In particular, scaphoid-centrale fusion shared among African apes and humans has been interpreted as an adaptation in knuckle-walkers, an exaptation in hominins, and has been offered as evidence for a knuckle-walking origin of bipedalism. However, ...