Characteristic position of fingers caused by severe forearm weakness (arrow).
s-IBM patient who has typical prominent weakness and atrophy of quadriceps and finger flexors.
(Engel, W. K., & Askanas, NEUROLOGY 2006;66(Suppl 1):S20-S29)
Wasting of the thigh muscle (calf not yet affected).
https://neuromuscular.wustl.edu/musdist/quad.html
Severe muscle wasting of the forearms.
(Amato-Barohn, 2009)
Weakness of finger flexion in patients attempting hand grip (make a fist)
with partial involvement (above) and end-stage (below).
(Greenberg, 2019)
