Bidisha Bhattacharjee, Debashina Das, Anwesha Chakrabarti
Sarojini Naidu College for Women. Kolkata
Rupam Banerjee
West Bengal State University, Kolkata
Pages: 69-79
Vision activates specialized brain networks that react differently according to the stimulus
type. Two of the most significant categories are human faces and natural scenery,
each processed by different brain systems. This research was conducted to find and
contrast the brain areas taking part in the perception of face and landscape pictures in
healthy young adult women with the aid of electroencephalogram (EEG). Twenty healthy
right-handed female participants between the ages of 18 and 25 with normal or correctedto-
normal vision watched 40 neutral human face pictures and 40 landscape pictures
using a passive view paradigm. EEG was recorded from 19 scalp electrodes as
participants viewed the alternating stimulus presentation. Preprocessing and statistical
analysis were carried out using MATLAB and Brainstorm, with spatial and temporal
dynamics of neural activation in mind. At 152 ms, face stimuli were associated with
significant activation at the C4 electrode (right central scalp), indicating early facespecific
processing elicited by the N170 component. Concurrently, landscape pictures
elicited activation of the T5 electrode (left posterior temporal area), presumably due to
parahippocampal place area (PPA) involvement responsible for spatial layout coding.
At 250 ms facial stimuli produced central activation at C4, CZ, and C3, and represents
recognition-related processing and binding of perception. At 400 ms face stimuli elicited
posterior activation of T5, P3, PZ, P4, T6, O1, and O2, while landscape stimuli, by
contrast, elicited frontal and prefrontal electrodes such as F7, FZ, FP1, and FP2 reflecting
top-down elaborative processes, mental imagery, and perhaps autobiographical memory