Diptych self-portrait that illustrate the duality in my life: artistic and scientific work, internal portrait (my own MRI image) external portrait, Southern hemisphere-Northern hemisphere (I am originally from South-America), French and English language (the title is a word game where I use the concept of the inside-inside Russian doll "Matryoshka" and replace the MA by MY and MOI). This work is 24'' x 24'' each piece done with acrylic on recycled wood panels.