SciCombinator

Discover the most talked about and latest scientific content & concepts.

Concept: Flexor pollicis longus muscle

28

A previous ultrasound study showed inflammation around the extensor pollicis longus tendon and surrounding structures at 6 weeks after manipulation, with or without pin fixation, and immobilization for distal radius fracture. Ultrasound examination after plating of distal radius fracture followed by early active mobilization of the wrist showed a short-lived inflammatory response, evident at 2 weeks but not at 6 weeks, around the extensor pollicis longus tendon (26 wrists examined) and flexor pollicis longus tendon (18 wrists examined). Early active mobilization of the wrist appears to limit the duration of inflammation around these tendons.

Concepts: Flexor digitorum profundus muscle, Carpal tunnel, Flexor pollicis brevis muscle, Extensor pollicis longus muscle, Extensor pollicis brevis muscle, Flexor pollicis longus muscle, Distal radius fracture, Wrist

27

27

Strong evidence indicates that highly repetitive manual work is associated with the development of upper extremity musculoskeletal disorders (MSDs). One of the occupational activities that involves highly repetitive and forceful hand work is manual pipetting in chemical or biological laboratories. In the current study, we quantified tendon displacement as a parameter to assess the cumulative loading exposure of the musculoskeletal system in the thumb during pipetting. The maximal tendon displacement was found in the flexor pollicis longus (FPL) tendon. Assuming that subjects' pipetting rates were maintained constant during a period of 1h, the average accumulated tendon displacement in the FPL reached 29m, which is in the lower range of those observed in other occupational activities, such as typing and nail gun operations. Our results showed that tendon displacement data contain relatively small standard deviations, despite high variances in thumb kinematics, suggesting that the tendon displacements may be useful in evaluating the musculoskeletal loading profile.

Concepts: Variance, Standard deviation, Michigan, Musculoskeletal system, Extensor pollicis brevis muscle, Flexor pollicis longus muscle

2

We investigated the flexor pollicis longus (FPL) tendon and median nerve in smartphone users by ultrasonography to assess the effects of smartphone addiction on the clinical and functional status of the hands.

Concepts: Hand strength, Extensor pollicis brevis muscle, Ulnar nerve, Flexor pollicis longus muscle, Carpal tunnel

0

The aim of this study was to establish whether there is a relationship between conditions of accommodative visual dysfunctions and cervical complaints. Fifty-two participants were included. Variables were accommodative amplitude, positive and negative relative accommodation (NRA), accommodative response, and accommodative facility. Subjects were classified as accommodative insufficiency, accommodative excess, or normal. Neck complaints were measured with the Neck Disability Index, the Visual Analogue Scale, and by cervical range of motion, deep flexor muscle activation score, and performance index. We found the following significant relationships: between NRA and both performance index and left-side bending; accommodative amplitude right-eye with right-side bending and with left-side bending; accommodative amplitude left-eye with right-side bending; and accommodative facility left-eye with both performance index and left-side bending. In accommodative amplitude right-eye, aIl participants showed significant values and greater than those with accommodative excess. In both groups, performance index values were decreased. Greater pain and lower right-rotation were found in participants with accommodative excess than in those with accommodative insufficiency. We conclude that accommodative dysfunctions are related to low performance index, decreased range of motion, as well as greater neck pain.

Concepts: Flexor pollicis longus muscle, Flexor muscle, Relationship, Following, Positive relative accommodation, Negative relative accommodation, Amplitude of accommodation, Accommodation

0

The aim of the study was to investigate the anatomy and histology of Linburg-Comstock variation, or the anomalous connection between flexor pollicis longus and flexor digitorum profundus to the index finger, in Thai population.

Concepts: Finger, Carpal tunnel, Extensor pollicis brevis muscle, Index finger, Flexor pollicis longus muscle, Flexor digitorum profundus muscle

0

Impairment in the cervical proprioception and deep flexor muscle function and morphology have been regarded to be associated with chronic neck pain (CNP).

Concepts: Muscular system, Flexor pollicis longus muscle, Flexor muscle, Muscle

0

We report a case of carpal tunnel syndrome and trigger wrist caused by localized amyloidosis. A 37-year-old man, who worked as a manufacturer, presented with a 5-month history of tingling sensation in the three radial fingers of the left hand and a painful click at the volar aspect of the wrist during digital motion. We divided the transverse carpal ligament and detected diffuse tenosynovitis that was especially severe around the flexor digitorum profundus tendons. Histological findings led to a diagnosis of amyloidosis. Localized amyloidosis could thus be a cause of trigger wrist. Systemic amyloidosis may develop in patients with localized amyloidosis; therefore, patients with trigger wrist caused by flexor tenosynovitis should be investigated for the existence of localized amyloidosis, with biopsy of the flexor tenosynovium.

Concepts: Median nerve, Flexor pollicis longus muscle, Carpus, Paresthesia, Flexor digitorum profundus muscle, Wrist, Carpal tunnel syndrome, Carpal tunnel

0

Constructing a lateral key pinch (KP) is a universal aim of any functional upper limb surgery program for tetraplegia. Three stages are required: (1) activating the pinch mechanism by flexor pollicis longus tenodesis to the radius or by tendon transfer to the flexor pollicis longus, (2) simplifying the polyarticular chain, and (3) positioning the thumb column. We compared 2 techniques for accomplishing the latter stage, 1 utilizing arthrodesis of the carpometacarpal joint (CMC) and 1 that did not require arthrodesis of the CMC.

Concepts: Stage, Carpometacarpal joint, Wrist, Michigan, Adductor pollicis muscle, Extensor pollicis brevis muscle, Upper limb, Flexor pollicis longus muscle

0

Linburg-Comstock variation often connecting the flexor pollicis longus and flexor digitorum profundus of the index finger at a different level with significant discrepancy between clinical and cadaveric frequencies reported in the literature. Although this variation is quite prevalent, it is yet frequently unrecognized. The aim of this meta-analysis is to generate more accurate weighted frequency values of the Linburg-Comstock variation and to look for possible association with ethnicity, laterality, gender and side.

Concepts: Finger, Carpal tunnel, Extensor pollicis brevis muscle, Index finger, Flexor pollicis longus muscle, Flexor digitorum profundus muscle