scholarly journals Analysis of the increase in cross-sectional area of the median nerve and its relation to age in neonates, infants and children using high-resolution ultrasound imaging

2020 ◽  
Author(s):  
Carole Jenny ◽  
Jürg Lütschg ◽  
Philip J. Broser
Keyword(s):  
High Resolution ◽  
Median Nerve ◽  
Cross Sectional Study ◽  
Cross Sectional Area ◽  
Infants And Children ◽  
Normative Values ◽  
Ultrasound Images ◽  
List Type ◽  
Sectional Area ◽  
Cross Sectional

ABSTRACTAIMTo analyze the increase in the cross-sectional area (CSA) of the median nerve during early childhood.METHODThis prospective, cross-sectional study used high-resolution ultrasound images of the median nerve from three locations (wrist, forearm and upper arm). A total of 43 participants (32 of whom were children younger than 2 years) were included in the study.RESULTSA strong and highly significant correlation was found between age and CSA (r = 0.8, p < 0.0001). The growth rate of CSA decreases with age. The increase in CSA follows a logarithmic growth curve (p < 0.0001). Based on the regression analysis, an age-synchronous increase in CSA for all three locations was found. The nerve reaches 70% of its final CSA by 2 years of age.INTERPRETATIONSimilar to the nerve conduction speed, the increase in CSA is greatest during the first 2 years of life. Then, the rate gradually and synchronously slows at the proximal and distal locations.What this paper adds-Normative values for increased cross-sectional area (CSA) of the median nerve.-Standardized locations and image procedures outlined for the clinical setting.-Growth dynamic of the CSA of the median nerve in children.-Normative data for development of the median nerve in children.-High resolution ultrasound images of the maturating median nerve in neonates, infants and children.

scholarly journals Role of High-Resolution Ultrasonography in Evaluation of Median Nerve and Thickness of Flexor Retinaculum in Patients with Hypothyroidism

2020 ◽  
Vol 2 ◽  
pp. 36-43
Author(s):  
Kunwar Pal Singh ◽  
Kamlesh Gupta ◽  
Iqbaljit Kaur ◽  
Vijinder Arora
Keyword(s):  
High Resolution ◽  
Healthy Volunteers ◽  
Median Nerve ◽  
Cross Sectional Area ◽  
Width Ratio ◽  
Sectional Area ◽  
Cross Sectional ◽  
Flexor Retinaculum ◽  
Nerve Fascicle ◽  
High Resolution Ultrasonography

Objectives: To determine the role of high resolution ultrasonography in evaluation of cross sectional area, maximum nerve fascicle thickness and thickness/width ratio of the median nerve and flexor retinaculum thickness in patients with hypothyroidism and to correlate it with the healthy volunteers. Material and Methods: A prospective study was conducted from February 2018 to October 2019 on 62 patients which included 32 clinically proven cases of hypothyroidism and 30 healthy volunteers. High resolution ultrasonography was performed using high frequency linear probes. Results: The most affected parameter was cross sectional area of median nerve at three levels, inlet/outlet ratio of CSA of the median nerve and thickness of flexor retinaculum in hypothyroidism patients in correlation with healthy volunteers. These parameters showed statistically significant p values. Maximum nerve fascicle thickness and thickness/width ratio of the median nerve showed no statistical significance in hypothyroid patients in correlation with healthy volunteers. Conclusion: High-resolution ultrasonography plays an important role in evaluating the changes occuring in cross sectional area of the median nerve, its inlet/outlet CSA ratio and flexor retinaculum thickness in hypothyroidism patients as correlated with the healthy volunteers.

Musicians Have Thicker Median Nerve Cross Sectional Area and More Symptoms of Carpal Tunnel Than Non-Musicians

2020 ◽  
Vol 35 (3) ◽  
pp. 138-144
Author(s):  
Emily Pratt ◽  
Henning Vauth ◽  
Gary McIlvain ◽  
Mark K Timmons
Keyword(s):  
Median Nerve ◽  
Carpal Tunnel ◽  
Hand Function ◽  
Cross Sectional Area ◽  
Mean Difference ◽  
Control Group ◽  
Ultrasound Images ◽  
Sectional Area ◽  
Cross Sectional ◽  
Patient Reported

AIMS: Musicians spend numerous hours perfecting their skills and art, often leading to overuse injuries of the hand; of specific concern to musicians is carpal tunnel syndrome (CTS). This study evaluated the median nerve cross-sectional area and hand function of musicians and made comparisons to non-musicians. METHODS: Seventy-six participants took part in the study, 38 music students and professors in the musician group and 38 participants in the control group. Participants completed patient-reported questionnaires to assess the level of pain and hand function. Ultrasound images were collected at the carpal tunnel inlet and outlet. The median nerve cross-sectional area and the depth of the carpal tunnel were measured on ultrasound images using software imbedded in the ultrasound unit. RESULTS: Musicians showed higher levels of hand dysfunction and CTS symptoms than the non-musicians. The median nerve cross-sectional area was greater in musicians than in the non-musician group on both the right (mean difference 1.5 mm2, p=0.002) and left sides (mean difference 0.9 mm2, p=0.036). The depth of the carpal tunnel at the carpal tunnel inlet and outlet did not differ between the groups (p>0.05). CONCLUSION: The current research identified between-group differences in median nerve cross-sectional area and the level of hand dysfunction. Understanding the interaction between the anatomy of the wrist and wrist and hand dysfunction will benefit clinicians when evaluating and treating musicians.

scholarly journals High-resolution ultrasonography of cross-sectional area of median nerve compared with electro-diagnostic study in carpal-tunnel syndrome

2017 ◽  
Vol 2 (4) ◽  
pp. 127-131 ◽  
Author(s):  
Maryam Sahebari ◽  
Masoud Pezeshki Rad ◽  
Mohammad Ali Nahayati ◽  
Morteza Saeidi ◽  
Reza Boostani ◽  
...  
Keyword(s):  
High Resolution ◽  
Carpal Tunnel Syndrome ◽  
Median Nerve ◽  
Carpal Tunnel ◽  
Cross Sectional Area ◽  
Diagnostic Study ◽  
Sectional Area ◽  
Cross Sectional ◽  
Tunnel Syndrome ◽  
High Resolution Ultrasonography
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