Article Figures & Data
Figures
- Figure 1.
Attention shift task. The visual display contained a target stream of letters at fixation and four surrounding distractor streams. A binaural target stream of spoken letters was accompanied by a monaural distracting stream in each ear. Either vision or audition was attended at the beginning of a run. Participants pressed a button whenever a digit was detected. If the digit was 2, they were to maintain attention on the currently attended modality; if it was 4, they were to switch attention to the other modality.
- Figure 2.
Cortical activity in auditory and visual sensory regions during the attention shift task. a, Group activation pattern for regions more active during attention to audition than attention to vision (Heschl's gyrus). b, c, Mean event-related BOLD time course from activated voxels in the right (b) and left (c) auditory cortices, respectively, time locked to each of the four target types. d, Group activation pattern for regions more active during attention to vision than attention to audition (fusiform gyrus). e, f, Mean event-related BOLD time course from activated voxels in the right (e) and left (f) fusiform gyrus, time locked to each of the four target types.
- Figure 3.
a, Cortical activity in precuneus/superior parietal lobule during the attention shift task reveals greater activity when attention was shifted from one modality to another compared with when attention was maintained within a single modality. IPL, Inferior parietal lobe. b, Mean event-related BOLD time course from activated voxels within the precuneus/SPL, time locked to each of the four target types.
Tables
- Table 1.
Cortical regions exhibiting sensory attentional modulation and shift-related activity
Anatomical region BA (x, y, z) Number of voxels t(10) Shift and hold audition > shift and hold vision R STG 22 (53, −26, 5) 1398 4.87 L STG 21 (−60, −26, −7) 1799 4.86 R IFG/insula 13 (38, 20, 8) 456 4.00 L insula 13 (−37, 20, 2) 85 4.39 L MFG 9 (−46, 12, 26) 536 4.65 Shift and hold vision > shift and hold audition R Fus 37 (44, −56, −11) 562 −4.53 L Fus 21 (−43, −56, −11) 277 −4.56 R MTG 39 (45, −66, 24) 245 −4.79 L SFG 9 (−23, 46, 31) 214 −5.03 L SFG 8 (−23, 24, 48) 277 −4.50 Shift > hold R Precun/SPL 7 (2, −60, 45) 1040 4.43 L IPL 40 (−43, −47, 48) 476 4.52 R SFS/PreCeG 6 (29, −4, 56) 187 4.51 -
Coordinates (x, y, z) are reported in Talairach space (Talairach and Tournoux, 1988); t values are computed across all voxels within the activated cluster. BA, Brodmann area; L, left; R, right; STG, superior temporal gyrus; IFG, inferior frontal gyrus; MFG, medial frontal gyrus; Fus, fusiform gyrus; MTG, middle temporal gyrus; SFG, superior frontal gyrus; Precun, precuneus; SPL, superior parietal lobule; IPL, inferior parietal lobule.
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