Perceiving age and gender in unfamiliar faces: an fMRI study on face categorization

Area of Science:

• Neuroscience
• Cognitive Psychology
• Human Perception

Background:

• Efficient processing of unfamiliar faces often involves categorization by age or gender.
• Age and gender categorization may present distinct perceptual demands.
• Understanding these demands is crucial for mapping face processing networks.

Purpose of the Study:

• To compare brain activity during age versus gender categorization of unfamiliar faces using fMRI.
• To investigate how task demands influence activation within core face processing regions.
• To identify specific brain areas showing differential activation based on categorization task.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
• Participants performed age and gender categorization tasks on unfamiliar faces.
• Stimuli included faces varying in age (old/young) and gender (male/female).

Main Results:

• Both age and gender categorization activated bilateral fusiform gyri (FFA) and inferior occipital gyri (OFA).
• Gender categorization elicited significantly enhanced activation compared to age categorization.
• This enhancement was observed in the right FFA and left OFA.
• Increased activation may be linked to greater configural processing demands during gender tasks.

Conclusions:

• Core components of the face processing network show task-dependent activation.
• Gender categorization of faces may require more complex configural processing than age categorization.
• Findings contribute to understanding the neural basis of face perception and categorization.