Passive and active recognition of one's own face

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Brain Imaging

Background:

• Previous facial recognition studies focused on social figures and explicit discrimination.
• Understanding the neural basis of recognizing one's own face is crucial for self-perception research.

Purpose of the Study:

• To investigate the neural mechanisms underlying facial identity recognition, specifically using one's own face as a stimulus.
• To differentiate brain activation related to the visual representation of one's own face from sustained attention to this representation.

Main Methods:

• Positron Emission Tomography (PET) activation study with normal volunteers.
• Three tasks: control-face recognition (C), passive own-face recognition (P), and active own-face recognition (A).
• Measured brain activation and skin conductance responses.

Main Results:

• Own-face recognition (Tasks P and A) elicited increased skin conductance responses.
• Common activation for Tasks P and A (vs. C) observed in the left fusiform gyrus and right supramarginal gyrus, linked to own-face representation.
• Task A (vs. C and P) showed specific activation in prefrontal cortices, right anterior cingulate, right presupplementary motor area, and left insula, associated with sustained attention.

Conclusions:

• The left fusiform gyrus and right supramarginal gyrus are key regions for representing one's own face.
• The right supramarginal gyrus activation may relate to the self-representation within one's own body schema.
• Prefrontal and other associated regions are involved in maintaining sustained attention to one's own facial representation.