Fig. 2.

Condensations of desmin and vimentin in 12-week human fetus. (A, C, E, G) Desmin immunohistochemistry. (B, D, F) Vimentin expression. (A, B) In the tongue, condensations (spots) of desmin or vimentin expression are evident near the sagittal septum (asterisk). (C, D) In the biceps brachii muscle, the spots are arranged in line along the distal tendon. (E–G) In the trapezius muscle, the spots are located along the insertion into the clavicle (E, F). (G) The trapezius muscle fibers exhibit desmin spots in spite of their diffuse desmin expression at 15 weeks.