Influence of Smartphone Overuse on Grip Strength, Pinch Strength, and Cross-Sectional Area of Flexor Pollicis Longus Tendon and Median Nerve

2021 ◽  
Author(s):  
Paul Silvian Samuel ◽  
Khalid A Alahmari ◽  
Mohamed Adam ◽  
Ravi Shankar Reddy ◽  
Irshad Ahmad ◽  
...  
Keyword(s):  
Grip Strength ◽  
Median Nerve ◽  
Cross Sectional Area ◽  
Pinch Strength ◽  
User Group ◽  
Sectional Area ◽  
Flexor Pollicis Longus ◽  
Cross Sectional ◽  
Longus Tendon ◽  
Flexor Pollicis Longus Tendon

Abstract Background and Aim The adverse effects of smartphone size and weight on the hand and hand function have not been studied extensively. This study aimed to investigate the changes to the flexor pollicis longus tendon and median nerve using diagnostic ultrasound for high and low addiction smartphone users. Methodology In this cross-sectional study, 54 healthy male university students were divided into two groups according to the Smartphone Addiction Scale: high and low users. Demographic data, hand grip strength (kg), pinch strength (kg), and smartphone weight, length and width were measured and recorded. Diagnostic ultrasound examination determined the cross-sectional area of the median nerve (mm2) and flexor pollicis longus tendon (mm2) of the dominant and non-dominant hand. Result The cross-sectional area of the median nerve was significantly higher in the high-user group (7.4±1.3 mm2) than the low-user group (6.7±1.0 mm2). The correlation of phone weight, length and width with median nerve area was respectively positive, higher and significant (0.718, 0.747, and 0.733; p<0.05). The flexor pollicis longus tendon in the mid-thenar region was moderately positively correlated with phone length (0.430; p<0.02) for high addiction smartphone users. Conclusion The findings of the current study demonstrates that change to the median nerve and flexor pollicis longus tendon, could be linked to the width, weight and length of the smartphone and high addiction.

scholarly journals Ultrasound Assessment of the Median Nerve Does Not Adequately Discriminate the Carpal Tunnel Syndrome among Patients Diagnosed with Diabetes

Diabetology ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 226-231
Author(s):  
Carlos Antonio Guillen-Astete ◽  
Monica Luque-Alarcon ◽  
Nuria Garcia-Montes
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Cross Sectional Area ◽  
Diabetic Patients ◽  
Sectional Area ◽  
Cross Sectional ◽  
Patients With Diabetes ◽  
Ultrasound Assessment ◽  
Tunnel Syndrome

Background: Carpal tunnel syndrome is the most prevalent peripheral nerve entrapment condition of the upper limb. Among metabolic risk factors, diabetes is considered the most relevant. Although wrist ultrasound assessment of the median nerve has demonstrated a good correlation with the gold standard for the diagnosis of this syndrome, neurophysiological study, its usefulness in patients with diabetes is questionable because the compressive phenomenon is not the predominant one. Method: We conducted a retrospective study to compare the clinical and median nerve ultrasound features of patients with carpal tunnel syndrome previously diagnosed or not diagnosed with diabetes. Additionally, a linear multivariate regression analysis was performed to determine to what extent the cross-sectional area of the median nerve was dependent on the condition of diabetes by fixing other variables such as sex, age, or time of evolution. Results: We included 303 records of patients (mean age 44.3 ± 11.7 years old, 57.89% female, mean of time of evolution 13.6 ± 8.3 months) from 2012 to 2020. The cross-sectional area of the median nerve was 10.46 ± 1.44 mm2 in non-diabetic patients and 8.92 ± 0.9 mm2 in diabetic patients (p < 0.001). Additionally, diabetic patients had a shorter time of evolution (7.91 ± 8.28 months vs. 14.36 ± 0.526 months, p < 0.001). In the multivariate analysis, the resultant model (fixed R-square = 0.659, p = 0.003) included a constant of the following four variables: the evolution time (Beta coeff. = 0.108, p < 0.001 95% CI 0.091 to 0.126, standardized coeff. = 0.611), the condition of diabetes (Beta coeff. = −0.623, p < 0.001 95% CI −0.907 to −0.339, standardized coeff. = −0.152), the severity (Beta coeff. = 0.359, p = 0.001 95% CI 0.147 to 0.571, standardized coeff. = 0.169), and the masculine sex (Beta coeff. = 0.309, p = 0.003, 95% CI 0.109 to 0.509, standardized coeff. = 0.103). Conclusions: Ultrasound assessment of the median nerve in patients with diabetes is not a useful tool to confirm whether carpal tunnel syndrome should be diagnosed or not diagnosed.

scholarly journals Bifid Median Nerve in Carpal Tunnel Syndrome: Assessment with US Cross-sectional Area Measurement

Radiology ◽  
2011 ◽  
Vol 259 (3) ◽  
pp. 808-815 ◽  
Author(s):  
Andrea S. Klauser ◽  
Ethan J. Halpern ◽  
Ralph Faschingbauer ◽  
Florian Guerra ◽  
Carlo Martinoli ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Cross Sectional Area ◽  
Area Measurement ◽  
Sectional Area ◽  
Cross Sectional ◽  
Tunnel Syndrome

scholarly journals Value of cross-sectional area of median nerve by MRI in carpal tunnel syndrome

2020 ◽  
Vol 43 (6) ◽  
pp. 654-659
Author(s):  
Jin Sung Park ◽  
Hee-Chan Won ◽  
Jin-Young Oh ◽  
Dong-Hee Kim ◽  
Sun-Chul Hwang ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Cross Sectional ◽  
Tunnel Syndrome

scholarly journals Relationship between sonographically measured median nerve cross-sectional area and presence of peripheral neuropathy in diabetic subjects

2019 ◽  
Vol 10 (1) ◽  
pp. 47-56 ◽  
Author(s):  
Fredrick Andrew Attah ◽  
Christianah Mopelola Asaleye ◽  
Adeleye Dorcas Omisore ◽  
Babatope Ayodeji Kolawole ◽  
Adeniyi Sunday Aderibigbe ◽  
...  
Keyword(s):  
Peripheral Neuropathy ◽  
Median Nerve ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Cross Sectional

scholarly journals Sonographic Measurement of Cross-sectional Area of the Median Nerve in Academic Dentists Without Symptoms or Signs of Carpal Tunnel Syndrome

2018 ◽  
Vol 35 (2) ◽  
pp. 105-111
Author(s):  
Akram Asbeutah ◽  
Mohsen Dashti ◽  
Abdullah AlMajran ◽  
Aref Ghayyath
Keyword(s):  
Median Nerve ◽  
Statistical Significance ◽  
Working Hours ◽  
Cross Sectional Area ◽  
Dominant Hand ◽  
Sectional Area ◽  
Cross Sectional ◽  
Increased Risk ◽  
Bone Level ◽  
The Right

The objective was to evaluate the distribution of the cross-sectional area (CSA) and flattening ratio (FR) of the median nerve (MN) in asymptomatic academic dentists using ultrasonography (US). Fifty academic dentists underwent US of the MN in transverse section at the pisiform bone level and the CSA (mm2) and FR were measured bilaterally. A CSA of <10 mm2 was considered normal. Paired t-test showed no statistical significance between either hand for CSA and FR ( P> .05). Two independent t-tests showed significant statistical differences ( P= .023) between males and females in the right dominant hand for CSA. Linear correlation analysis showed no significant correlation between CSA and FR for number of years of experience or number of working hours per day in either hand ( P>.05). The CSA was abnormal in the right dominant hand in 20 (40%) of the subjects. These male academic dentists were at increased risk of having an enlarged MN without symptoms.

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