Muscle-ultrasound evaluation in healthy pediatric subjects: Age-related normative data.INTRODUCTION
 The muscle ultrasound examination (MUS) is a noninvasive and inexpensive technique for evaluating neuromyopathies.  Standardized MUS normative data are incomplete in pediatric subjects.


 We performed a MUS study with 120 healthy children (59 males; mean age, 10.44 years; age range, 2-16 years).  We measured the width and the echogenicity bilaterally in the following muscles: biceps brachii and brachialis, brachioradialis, forearm-flexors, rectus femoris and vastus intermedius, tibialis anterior, extensor hallucis longus, lateral and medial gastrocnemius.


 The muscle thickness increased with age for all muscles.  Confidence limits were set for each age group muscle width.  Echogenicity increased with age only in some muscles.


 Our MUS study provides new data on physiological muscle structural changes in healthy children to address the limited available references in this age group.  Muscle Nerve 58: 245-250, 2018.
MUS
Muscle-ultrasound evaluation in healthy pediatric subjects: Age-related normative data.INTRODUCTION
 The muscle ultrasound examination (MUS) is a noninvasive and inexpensive technique for evaluating neuromyopathies.  Standardized MUS normative data are incomplete in pediatric subjects.


 We performed a MUS study with 120 healthy children (59 males; mean age, 10.44 years; age range, 2-16 years).  We measured the width and the echogenicity bilaterally in the following muscles: biceps brachii and brachialis, brachioradialis, forearm-flexors, rectus femoris and vastus intermedius, tibialis anterior, extensor hallucis longus, lateral and medial gastrocnemius.


 The muscle thickness increased with age for all muscles.  Confidence limits were set for each age group muscle width.  Echogenicity increased with age only in some muscles.


 Our MUS study provides new data on physiological muscle structural changes in healthy children to address the limited available references in this age group.  Muscle Nerve 58: 245-250, 2018.
MUS
Muscle-ultrasound evaluation in healthy pediatric subjects: Age-related normative data.INTRODUCTION
 The muscle ultrasound examination (MUS) is a noninvasive and inexpensive technique for evaluating neuromyopathies.  Standardized MUS normative data are incomplete in pediatric subjects.


 We performed a MUS study with 120 healthy children (59 males; mean age, 10.44 years; age range, 2-16 years).  We measured the width and the echogenicity bilaterally in the following muscles: biceps brachii and brachialis, brachioradialis, forearm-flexors, rectus femoris and vastus intermedius, tibialis anterior, extensor hallucis longus, lateral and medial gastrocnemius.


 The muscle thickness increased with age for all muscles.  Confidence limits were set for each age group muscle width.  Echogenicity increased with age only in some muscles.


 Our MUS study provides new data on physiological muscle structural changes in healthy children to address the limited available references in this age group.  Muscle Nerve 58: 245-250, 2018.
MUS
Muscle-ultrasound evaluation in healthy pediatric subjects: Age-related normative data.INTRODUCTION
 The muscle ultrasound examination (MUS) is a noninvasive and inexpensive technique for evaluating neuromyopathies.  Standardized MUS normative data are incomplete in pediatric subjects.


 We performed a MUS study with 120 healthy children (59 males; mean age, 10.44 years; age range, 2-16 years).  We measured the width and the echogenicity bilaterally in the following muscles: biceps brachii and brachialis, brachioradialis, forearm-flexors, rectus femoris and vastus intermedius, tibialis anterior, extensor hallucis longus, lateral and medial gastrocnemius.


 The muscle thickness increased with age for all muscles.  Confidence limits were set for each age group muscle width.  Echogenicity increased with age only in some muscles.


 Our MUS study provides new data on physiological muscle structural changes in healthy children to address the limited available references in this age group.  Muscle Nerve 58: 245-250, 2018.
MUS
Muscle-ultrasound evaluation in healthy pediatric subjects: Age-related normative data.INTRODUCTION
 The muscle ultrasound examination (MUS) is a noninvasive and inexpensive technique for evaluating neuromyopathies.  Standardized MUS normative data are incomplete in pediatric subjects.


 We performed a MUS study with 120 healthy children (59 males; mean age, 10.44 years; age range, 2-16 years).  We measured the width and the echogenicity bilaterally in the following muscles: biceps brachii and brachialis, brachioradialis, forearm-flexors, rectus femoris and vastus intermedius, tibialis anterior, extensor hallucis longus, lateral and medial gastrocnemius.


 The muscle thickness increased with age for all muscles.  Confidence limits were set for each age group muscle width.  Echogenicity increased with age only in some muscles.


 Our MUS study provides new data on physiological muscle structural changes in healthy children to address the limited available references in this age group.  Muscle Nerve 58: 245-250, 2018.
MUS
Muscle-ultrasound evaluation in healthy pediatric subjects: Age-related normative data.INTRODUCTION
 The muscle ultrasound examination (MUS) is a noninvasive and inexpensive technique for evaluating neuromyopathies.  Standardized MUS normative data are incomplete in pediatric subjects.


 We performed a MUS study with 120 healthy children (59 males; mean age, 10.44 years; age range, 2-16 years).  We measured the width and the echogenicity bilaterally in the following muscles: biceps brachii and brachialis, brachioradialis, forearm-flexors, rectus femoris and vastus intermedius, tibialis anterior, extensor hallucis longus, lateral and medial gastrocnemius.


 The muscle thickness increased with age for all muscles.  Confidence limits were set for each age group muscle width.  Echogenicity increased with age only in some muscles.


 Our MUS study provides new data on physiological muscle structural changes in healthy children to address the limited available references in this age group.  Muscle Nerve 58: 245-250, 2018.
MUS