Effects of electronic device overuse by university students in relation to clinical status and anatomical variations of the median nerve and transverse carpal ligament

Woo, Eugenia Hoi Chi; White, Peter; Lai, Christopher

doi:10.1002/mus.25697

Cited by 21 publications

(25 citation statements)

References 45 publications

(99 reference statements)

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“…This may be the result of modern smartphone designs, which require repeated finger motions such as clicking, scrolling, swiping, tapping, and pressing buttons. These requirements may affect fingertip forces, tendon excursion, and muscular effort 43) . Furthermore, many studies have shown that longer durations of smartphone use may decrease blood flow, prevent oxygen and nutrients from being supplied to muscles, and lead to small amounts of pain and fatigue [44][45][46][47] .…”

Section: Discussionmentioning

confidence: 99%

Evaluating hand performance and strength in children with high rates of smartphone usage: an observational study

2020

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This study investigated the interaction effects between the levels of smartphone use and hand dominance on handgrip, pinch strengths, and functional hand performance in children. [Participants and Methods] A total of 60 children aged between 9 and 15 were assigned into two groups: Group A (high-frequency smartphone users) and Group B (low-frequency smartphone users). Use levels were determined according to the smartphone addiction scale-short version. A hand dynamometer and pinch gauge were used to measure handgrip and pinch strength respectively. Functions of the upper extremity and hand were scored using the Quick Disabilities of the Arm, Shoulder, and Hand questionnaire. [Results] Group A participants had reduced measurements in hand grip and pinch strength, especially in the dominant hand. However, Quick Disabilities of the Arm, Shoulder, and Hand scores indicated that hand function was decreased in the dominant hand whether the child was a high-or low-frequency smartphone user. [Conclusion] Results indicated that high levels of smartphone use diminished hand and pinch-grip strengths as well as and hand function. That is, hand and pinch-grip strengths were reduced in the dominant hands of high-frequency smartphone users. However, hand functions were affected in the dominant hands among both high and low-level smartphone users.

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Section: Discussionmentioning

confidence: 99%

Evaluating hand performance and strength in children with high rates of smartphone usage: an observational study

2020

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“…2 B,C) 5 . When measuring the transverse carpal ligament (TCL), the ultrasound transducer was placed transversely at the carpal tunnel outlet of the wrist 15 .…”

Section: Methodsmentioning

confidence: 99%

“…There are conflicting hypotheses regarding the initial pathogenesis of CTS 4 – 8 . One hypothesis has characterized the syndrome as inflammation of the median nerve caused by compression, while another has characterized it as non-inflammatory fibrosis of the subsynovial connective tissue (SSCT) 12 – 15 . Several previous studies have suggested that reduced mobility of the median nerve in patients with CTS shares similar etiology 5 , 6 .…”

Section: Introductionmentioning

confidence: 99%

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Change to movement and morphology of the median nerve resulting from steroid injection in patients with mild carpal tunnel syndrome

Moon

Lee

Park

2020

Sci Rep

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There are conflicting hypotheses regarding the initial pathogenesis of carpal tunnel syndrome (CTS). One hypothesis characterizes it as inflammation of the median nerve caused by compression, while another hypothesis characterizes CTS as non-inflammatory fibrosis of the subsynovial connective tissue (SSCT). This study aimed to investigate the differences in the ultrasonography parameters before and after a steroid injection, which is effective for CTS, to elucidate the initial pathogenesis of CTS and the mechanisms of action of the injected steroid. Fourteen hands from 14 healthy participants and 24 hands from 24 participants with mild CTS were examined. Dynamic movement and morphology of the median nerve before and after steroid injection were measured. There was no significant difference in the normalized maximal distance of the median nerve, which reflects the degree of fibrosis in the SSCT indirectly, during finger and wrist movements before and after the injection among patients with CTS (p > 0.05). Among the parameters that indirectly reflects the degree of median nerve compression, such as normalized maximal change in the aspect ratio of the minimum-enclosing rectangle (MER), maximal change in the median nerve perimeter, and maximal value of the median nerve cross-sectional area (CSA), statistically significant differences were not observed between values of the normalized maximal change in the aspect ratio of the MER and maximal change in the median nerve perimeter, during finger and wrist movements recorded before and after the injection in patients with CTS (p > 0.05). However, multivariate logistic regression analysis revealed that the change in the normalized maximal value of the median nerve CSA, according to finger and wrist movement was correlated with the administration of the steroid injection (p < 0.05). In conclusion, compared to that noted before steroid injection, the median nerve CSA noted during finger and wrist movements changed significantly after injection in patients with mild CTS. Given the improvement in median nerve swelling after steroid injection, but no improvement in the movement of the median nerve during finger and wrist movements, median nerve swelling due to compression (rather than fibrosis of the SSCT may be the initial pathogenesis of early-stage (mild) CTS, and the fibrous changes around the median nerves (SSCT) may be indicative of secondary pathology after median nerve compression. Further studies are required to validate the findings of our study and confirm the pathogenesis of CTS.

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“…Dies alles ist lange bekannt und würde hier nicht so ausführlich geschildert werden, wenn nicht nach den vorliegenden neuen medizinischen Erkenntnissen das Karpaltunnelsyndrom auch bei intensivem Smartphone-Gebrauch auftreten würde. In Hongkong wurde im Jahr 2017 bei Studenten gefunden, dass diejenigen mit mehr als 5 Stunden Smartphone-Gebrauch täglich signifikant mehr Schmerzen im Bereich der dominanten Hand hatten als Studenten mit weniger als 5 Stunden Smartphone-Nutzung [15]. Auch waren die beiden Tests (Hoffmann-Tinel-Zeichen und Phalen-Zeichen) bei signifikant mehr Studenten der Gruppe der Vielnutzer positiv im Vergleich zur Gruppe der Wenignutzer.…”

unclassified

Karpaltunnelsyndrom bei intensiver Smartphone-Nutzung

Spitzer¹

2019

Nervenheilkunde

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Effects of electronic device overuse by university students in relation to clinical status and anatomical variations of the median nerve and transverse carpal ligament

Abstract: Overuse of electronic devices may adversely affect the median nerve within the carpal tunnel and the transverse carpal ligament, resulting in numbness, tingling, and pain in the hand. Caution may be warranted when using handheld electronic devices. Muscle Nerve 56: 873-880, 2017.

Cited by 21 publications

References 45 publications

Evaluating hand performance and strength in children with high rates of smartphone usage: an observational study

Evaluating hand performance and strength in children with high rates of smartphone usage: an observational study

Change to movement and morphology of the median nerve resulting from steroid injection in patients with mild carpal tunnel syndrome

Karpaltunnelsyndrom bei intensiver Smartphone-Nutzung

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