Arash Babaei-Ghazani1, Peyman Roomizadeh2, Esmaeil Nouri1, Golnaz Raeisi1, Naseh Yousefi1, Mahdieh Asilian-Mahabadi1, Mohammad Moeini3. 1. Department of Physical Medicine and Rehabilitation, Neuromusculoskeletal Research Center, Firozgar Hospital, Iran University of Medical Sciences, Valieasr square, Tehran, Iran. 2. Department of Physical Medicine and Rehabilitation, Neuromusculoskeletal Research Center, Firozgar Hospital, Iran University of Medical Sciences, Valieasr square, Tehran, Iran. roomizadeh@gmail.com. 3. Department of Emergency Medicine, Iran University of Medical Sciences, Tehran, Iran.
Abstract
PURPOSE: The purpose of this study was to investigate the ultrasonographic reference values for diameters and cross-sectional area (CSA) of the median nerve between the two heads of the pronator teres muscle in healthy population as well as to correlate the findings with height, weight, sex and age. METHODS: Fifty-five healthy Caucasian volunteers (110 median nerves) were included in this study. The reference range (mean ± 2 standard deviations; 2.5th-97.5th quintiles) and the upper limit of side-to-side difference of the median nerve between the two heads of the pronator teres muscle were investigated using high-frequency ultrasound. The effects of age, sex, height, handedness, and body mass index (BMI) were examined. RESULTS: The mean age was 39.4 ± 10.6 years (range 18-75 years). The mean ± 2SD of the median CSA was 4.9-12.9 mm2. The upper limit of normal side-to-side difference was 3.0 mm2. The differences between genders and between the dominant and non-dominant hands were not significant. The mean antero-posterior and transverse diameters were 7.2 ± 1.5 and 10.7 ± 2.4 mm, respectively. Significant correlations were observed between the dominant-side CSA and BMI (r = 0.33; p = 0.01) and age (r = 0.31; p = 0.02). The correlation between the CSA and height (r = 0.19; p = 0.16) was not significant. CONCLUSIONS: The measurements obtained in this study are of importance for examining median nerve entrapments in the forearm using high-frequency ultrasound. Age and BMI showed to be correlated with median nerve CSA; while gender and height were not.
PURPOSE: The purpose of this study was to investigate the ultrasonographic reference values for diameters and cross-sectional area (CSA) of the median nerve between the two heads of the pronator teres muscle in healthy population as well as to correlate the findings with height, weight, sex and age. METHODS: Fifty-five healthy Caucasian volunteers (110 median nerves) were included in this study. The reference range (mean ± 2 standard deviations; 2.5th-97.5th quintiles) and the upper limit of side-to-side difference of the median nerve between the two heads of the pronator teres muscle were investigated using high-frequency ultrasound. The effects of age, sex, height, handedness, and body mass index (BMI) were examined. RESULTS: The mean age was 39.4 ± 10.6 years (range 18-75 years). The mean ± 2SD of the median CSA was 4.9-12.9 mm2. The upper limit of normal side-to-side difference was 3.0 mm2. The differences between genders and between the dominant and non-dominant hands were not significant. The mean antero-posterior and transverse diameters were 7.2 ± 1.5 and 10.7 ± 2.4 mm, respectively. Significant correlations were observed between the dominant-side CSA and BMI (r = 0.33; p = 0.01) and age (r = 0.31; p = 0.02). The correlation between the CSA and height (r = 0.19; p = 0.16) was not significant. CONCLUSIONS: The measurements obtained in this study are of importance for examining median nerve entrapments in the forearm using high-frequency ultrasound. Age and BMI showed to be correlated with median nerve CSA; while gender and height were not.
Entities:
Keywords:
Entrapment; Median nerve; Pronator teres; Reference values; Ultrasonography
Authors: Mohammad Qrimli; Hamid Ebadi; Ari Breiner; Hafsah Siddiqui; Majed Alabdali; Alon Abraham; Leif E Lovblom; Bruce A Perkins; Vera Bril Journal: Muscle Nerve Date: 2016-04 Impact factor: 3.217
Authors: Elena J Jelsing; James C Presley; Eugene Maida; Nicholas J Hangiandreou; Jay Smith Journal: Muscle Nerve Date: 2014-11-19 Impact factor: 3.217