Fig. 3. Measured areas in the interscalene, supraclavicular, midinfraclavicular, and subcoracoid regions of all shoulders (L = left; R = right). (  A ) Absolute values (mm²) of neural and nonneural (connective) tissue inside the epineurium (median ± SD). (  B ) Relative values (percentage) of neural  versus nonneural tissue inside the epineurium (median ± SD). (  C ) Absolute values (mm²) of adipose/connective tissue compartment surrounding the brachial plexus depicted per shoulder, from the most proximal (location − 10 interscalene) to the most distal area (location + 10 subcoracoid).