Prevalence of bifid median nerves and persistent median arteries and their association with carpal tunnel syndrome in a sample of latino poultry processors and other manual workers
Published Date:Aug 27 2013
Source:Muscle Nerve. 2013; 48(4):539-544.
Carpal Tunnel Syndrome
Peripheral Arterial Disease
Pubmed Central ID:PMC3836559
Funding:1K23NS062892/NS/NINDS NIH HHS/United States
K23 NS062892/NS/NINDS NIH HHS/United States
R01 OH9251/OH/NIOSH CDC HHS/United States
The prevalence of bifid median nerves and persistent median arteries, their co-occurrence, and their relationship to carpal tunnel syndrome (CTS) are only understood partially.
We screened 1026 wrists of 513 Latino manual laborers in North Carolina for bifid median nerves and persistent median arteries using electrodiagnosis and ultrasound.
A total of 8.6% of wrists had a bifid median nerve, and 3.7% of wrists had a persistent median artery independent of subgroup ethnicity, age, gender, or type of work. An association with definite carpal tunnel syndrome was not found. The presence of either anatomic variant was associated with a high likelihood of co-occurrence of another variant in the same or the contralateral wrist.
The occurrence of median anatomic variants can be determined in field studies using ultrasound. Persistent median arteries and bifid median nerves tend to co-occur but do not put manual laborers at additional risk of developing CTS.
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