Source analysis of the N170 to faces and objects

• Published in: Neuroreport Vol. 15; no. 8; p. 1261
• Main Authors: Itier, Roxane J, Taylor, Margot J
• Format: Journal Article
• Language: English
• Published: England 07.06.2004
• Subjects: Adult; Brain Mapping; Cerebral Cortex - anatomy & histology; Cerebral Cortex - physiology; Cues; Electroencephalography; Evoked Potentials - physiology; Face; Female; Functional Laterality - physiology; Humans; Male; Nerve Net - physiology; Pattern Recognition, Visual - physiology; Photic Stimulation; Reaction Time - physiology; Temporal Lobe - anatomy & histology; Temporal Lobe - physiology; Visual Cortex - anatomy & histology; Visual Cortex - physiology; Visual Pathways - anatomy & histology; Visual Pathways - physiology
• ISSN: 0959-4965
• DOI: 10.1097/01.wnr.0000127827.73576.d8

To clarify the neural sources for the face-sensitive N170, ERPs were recorded in 16 subjects viewing upright and inverted faces, and compared to seven object categories. Source analyses were performed for each category and each subject at the latency of the N170. Larger source intensities were found in the posterior superior temporal sulcus region (STS) for faces compared to objects. STS intensities were highly correlated to the N170 amplitude over both hemispheres only for faces. The results suggest that one of the major sources of the N170 is the STS region and that the larger N170 amplitude to inverted faces is due to increased activation of that source for inverted faces rather than a recruitment of additional areas.