The 6Hz fundamental stimulation frequency rate for individual face discrimination in the right occipito-temporal cortex

Steady-state visual-evoked response to upright and inverted geometrical faces: A magnetoencephalography study

“…1) function, consistent with in previous SSVEP studies [12,13,17]. In addition, a recent study demonstrated that a frequency rate of 6 Hz gave the largest SSVEP response to faces [17].…”

“…The projector refresh rate (60 Hz) was also considered because the stimulus was presented as a sinusoidal (rather than abrupt, as in a square wave function; see Fig. 1) function, consistent with in previous SSVEP studies [12,13,17]. In addition, a recent study demonstrated that a frequency rate of 6 Hz gave the largest SSVEP response to faces [17].…”

Functional selectivity for face processing in the temporal voice area of early deaf individuals

“…The hypothesis that the auditory cortex participates in early sensory/perceptual processing after early auditory deprivation, in contrast with previous assumptions that such recruitment manifests only for late and higher level cognitive process (41,42), also finds support in our MEG finding that a face-selective response occurs at about 196 ms in the right dTFA. The finding that at least 150 ms of information accumulation is necessary for highlevel individuation of faces in the cortex (22) suggests that the faceselective response in the right dTFA occurs immediately after the initial perceptual encoding of face identity. Similar to our findings, auditory-driven activity in reorganized visual cortex in congenitally blind individuals was also better explained by direct connections with the primary auditory cortex (43) whereas it depended more on feedback inputs from high-level parietal regions in late-onset blindness (43).…”

“…To further evaluate whether reorganized dTFA is also able to differentiate between individual faces, we implemented a second experiment using fMRI adaptation (16). Recent studies in hearing individuals have found that a rapid presentation rate, with a peak at about six face stimuli by second (6 Hz), leads to the largest fMRI-adaptation effect in ventral occipitotemporal faceselective regions, including the FFA, indicating optimal individualization of faces at these frequency rates (21,22). Participants were presented with blocks of identical or different faces at five frequency rates of presentation between 4 and 8.5 Hz.…”

The face evoked steady-state visual potentials are sensitive to the orientation, viewpoint, expression and configuration of the stimuli

“…While the reason for this discrepancy is unclear and calls for further investigation, this result raises the possibility that methodological factors might play a role in determining the temporal dynamics of the ADA effect. In particular, the less robust design relative to Rossion et al (2012), including less face identities (7 instead of 18) and less repetitions (1 instead of 2/condition) might have contributed to the delay of the ADA effect (although a recent study found no effect of the number of face identities used in the DIFF condition, see Alonso-Prieto et al, 2013). It is also possible that the face identities in the present study were more homogeneous than those used in the previous ones which lead to less robust identity adaptation effects.…”