Fig. 1

Ultrasound assessments of the muscular thickness of the flexor digitorum muscles (superficial and profound, assessed as one unit together). Abbreviations: FCR = flexor carpi radialis; FCU = flexor carpi ulnaris; FPL = flexor pollicis longus; PL = palmaris longus; T-FD-1 = first thickness assessment of the FD; T-FD-2 = second thickness assessment of the FD – 2nd measurement. The template of the current figure was received and modified with permission from Sklerov and Pullman [21] and the original source [22], Charles C Thomas Publisher, Ltd., Springfield, IL, USA