Facial expressions of (some) emotions are inborn?

Couple of staring points for reading (beyond Paul Ekman’s publications):

  • Peleg et al, 2006, Hereditary family signature of facial expression. PNAS, 103: 43. DOI: 10.1073/pnas.0607551103 
  • Matsumoto &  Willingham, 2009, Spontaneous facial expressions of emotion of congenitally and noncongenitally blind individuals. Journal of Personality and Social Psychology, 96: 1. DOIi: 10.1037/a0014037