This case report presents a case of Fanconi's Anemia with an unusual thumb polydactyly in a 2-year-old boy. The extra thumb had no nail, nail bed and distal phalanx. The extra thumb had no active motion. The duplication of the thumb occurred at the carpometacarpal joint but its morphology did not match with any classification described for thumb polydactyly. Although his thumb polydactyly was a...

The purpose of this study was to investigate altered finger-thumb coupling in individuals with chronic hemiparesis poststroke. First, an external device stretched finger flexor muscles by passively rotating the metacarpophalangeal (MCP) joints. Subjects then performed isometric finger or thumb force generation. Forces/torques and electromyographic signals were recorded for both the thumb and fi...

The purpose of this study was to compare the range of motion (ROM) and strength of the metacarpophalangeal (MP) and interphalangeal (IP) joints among massage practitioners with and without thumb pain and control subjects. Sixteen massage practitioners with thumb pain, 16 practitioners without thumb pain, and 16 control subjects participated in this study. ROM of flexion, extension, and abductio...

Robotic exoskeleton is getting important to human in many aspects such as power assist, muscle training, regain motor function and rehabilitation. The research and development towards these functions are expected to be combined and integrated with the human intelligent and machine power, eventually becoming another generation of robot which will enhance the machine intelligent and human power. ...

Rehabilitation of the upper extremities, especially the hands, is critical for the restoration of independence in activities of daily living for individuals suffering from hand disabilities. There are currently two major challenges in developing robotic devices for hand rehabilitation: (1) design of a device that is compatible with the complex geometry and nonlinear biomechanics of the human ha...

A number of robotic exoskeletons are being developed to provide rehabilitation interventions for those with movement disabilities. We present a systematic framework that allows for virtual prototyping (i.e., design, control, and experimentation (i.e. design, control, and experimentation) of robotic exoskeletons. The framework merges computational musculoskeletal analyses with simulation-based d...

INTRODUCTION One of the most important hand functions is thumb opposition, which results from flexion, abduction and axial rotation at the carpometacarpal, metacarpophalangeal and interphalangeal joints [1]. The thenar muscles, innervated by the median nerve, are critical for coordinated thumb movements. It is commonly observed that thumb opposition is impaired with median neuropathy [2]. The c...

Angular deformity of the thumb is most often caused by a delta phalanx or a longitudinally bracheted diaphysis in a triphalangeal thumb. In some angled thumb, however, triangular-shaped secondary ossification center can cause the deformity, which can be called “abnormal triangular epiphysis” of the thumb. A few clinicians have reported this entity, but they do that utilise this term instead cla...

Resently the authors had the opportunity of performing surgery of a trifurcated thumb, an extremely rare morphological polydactylous condition of the thumb. Trifurcated thumb had not been included under classification of polydactylous thumb heretofore. Comments were made on this entity from the standpoint of its morphology and consideration was given to its developmental mechanism. Also as surg...

Purpose. This study was conducted to identify the surface projection of the interosseous foramen and associated structures of the proximal leg using the average clinician's thumb width as a quick measurement to assist in differential diagnosis and treatment. Methods. Twelve cadavers (5 males and 7 females, age range = 51-91 years, and mean age = 76.9) were dissected for analysis. Location and s...