Muscle and tendon variations in hand and wrist are not rare; thus their type must be well known in practicing hand surgery. Abductor pollicis longus (APL) and extensor digitorum (ED) are known to exhibit different variations with respect to their attachments. Various studies have reported splitting of the APL and ED [1-8]. The ED has one origin and a common muscle belly that splits into three o...

BACKGROUND Neuromuscular blockade of the adductor pollicis muscle may be influenced by hand dominance resulting in conflicting results of several studies. The current study examined whether hand dominance could influence the measurements of neuromuscular blockade with acceleromyography at the adductor pollicis. METHODS The acceleromyographic responses from 0.6 mg/kg of rocuronium were monitor...

During the educational dissection of a 69-year-old Chinese male cadaver, an extensor digiti minimi (EDM) with five slips on the right hand was discovered. Except for the two slips of the little finger, the two radial slips were inserted into the dorsal aponeurosis of the middle finger and the ring finger, respectively. The middle slip was connected to the junctura tendinum in the fourth interme...

We report the case of a complete rupture of flexor pollicis longus tendon in a 30-year old-man 10 years after open reduction and internal fixation of a distal radius fracture with a volar buttress plate.

A 25-year-old woman with end-stage renal failure presented with subcutaneous calcinosis cutis that grew rapidly in both hands. Radiographs showed subcutaneous lobulated calcific deposits. Magnetic resonance imaging revealed a heterogeneous mass encasing segments of the abductor pollicis longus and extensor pollicis brevis tendons. Excision of the masses was performed. Histopathology revealed am...

The contractile properties of a large proximal muscle (quadriceps femoris) and a small distal muscle (adductor pollicis) have been measured in normal children and children with neuromuscular disorders. The method of stimulating the quadriceps femoris to contract, previously evaluated in adults, was found to be acceptable to children. In normal children a number of indices of muscle function wer...

In this work we present a biomechanical model of the normal and reconstructed human hand. The objective of this model is to predict muscle forces during the following three tasks: tip pinch, key pinch and grasp. The model takes into account all the available tendons in the fingers. Two common tendon transfers, to reconstruct the pathological hands, are then simulated. The brachioradialis BR tra...

1. The effect of intravenous aminophylline on the contractility of adductor pollicis has been studied in three subjects both in the fresh state and following the induction of muscle fatigue. 2. Aminophylline had no influence on the frequency-force relationship and relaxation rate of adductor pollicis in the fresh state. 3. Fatigue resulted in a selective depression of the force response to low ...

This study investigated the relationship between thumb muscle activity and thumb operating tasks on a smartphone touchscreen in elderly users (right hand posture). Three thumb muscles were targeted in the experiment, namely, abductor pollicis brevis, abductor pollicis longus (APL) and first dorsal interosseous (FDI). The results showed that the elderly participants developed fatigue rapidly and...