We presented bilateral streams of peri-threshold sounds 1000-Hzz at 5 dB SL to the left ear, termed "left standards," and 500-Hz at 5 dB SL to the right ear, termed "right standards") in the presence of various levels of added broadband acoustic noise (no-noise, -5, 0, 5, 10 and 20 dB SL to the left ear only) while recording 64-channel EEG (see Figure 1 for stimulus timing).
The clusters comprised bilateral ventral-stream regions (inferior temporal gyrus and parahippocampal gyrus) including the bilateral PRCs (Table 1, see e.g. refs. 47,48).
Lastly, notice that recent models of speech processing (Friederici, 2011, Hickok and Poeppel, 2007) suggest that only the ventral language stream is bilateral, while the dorsal stream, which relies largely on the AF, is strongly left lateralised.
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The IPS then showed stronger connectivity with the bilateral ventral visual stream as well as with the seed on the bilateral posterior inferior frontal gyrus.
The IPL/SPL on the other hand showed stronger connectivity with the bilateral dorsal visual stream and the seed on the bilateral posterior superior frontal gyrus.
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Additionally, the bilateral integration of the ascending streams of the tectofugal system is selectively inhibited by GABAergic fibers from a cluster of nuclei, collectively called bed nuclei of the tecto-thalamic tract [22].
The neuroimaging data related the chess specific object recognition to the bilateral areas of the dorsal stream in the lateral temporal and parietal lobes.
The comparison revealed a strong repetition suppression effect in the bilateral ventral and dorsal ventral stream, including the left (MNI: −44,−86,−8, Z = 4.19) and the right (MNI: 42,−58,−20, Z = 3.70) midfusiform cortices, the bilateral inferior and superior occipital gyri, and the superior parietal lobule.
This resulted in a large area of overlap between brain regions showing adaptation and some form of recovery, including large bilateral extents in the dorsal and ventral visual streams, thalamus, and frontal areas (green mask in Fig. 3).
