Wikimedia Commons
Spasm of m. corrugator supercilii under very strong light (left); A relaxed face (photographed in full sunshine) (right)
Guillaume Duchenne de Boulogne (1806–1875)
photograph in the National Gallery of Art (NGA 169270)
- Date1854
- Techniquealbumen print
- Dimensions22.9 × 16.9 cm
- Exposée àNational Gallery of Art
Washington, États-Unis