Soyuhos, O., & Baldauf, D. (2022)
“Neuroimaging evidence suggests that the frontal eye field (FEF) and inferior frontal junction (IFJ) govern the encoding of spatial and non-spatial” (Soyuhos and Baldauf, 2022, p. 1)
“we hypothesized that FEF has predominant functional coupling with spatiotopically organized regions in the dorsal (‘where’) visual stream” (Soyuhos and Baldauf, 2022, p. 1)
“IFJ has predominant functional connectivity with the ventral (‘what’) visual stream” (Soyuhos and Baldauf, 2022, p. 1)
“FEF has a robust power correlation with the dorsal visual pathway in beta and gamma bands” (Soyuhos and Baldauf, 2022, p. 1)
“anterior IFJ (IFJa) has a strong power coupling with the ventral visual stream in delta, beta, and gamma oscillations” (Soyuhos and Baldauf, 2022, p. 1)
“FEF exerts top-down regulatory influences on the extrastriate visual cortex and increases the response gain to retinotopically corresponding targets directly or indirectly through its connections to the intraparietal sulcus (IPS)” (Soyuhos and Baldauf, 2022, p. 2)
“FEF’s key function in the top-down control of visuospatial attention” (Soyuhos and Baldauf, 2022, p. 2)
“we hypothesize that FEF has predominant functional connectivity with spatiotopically organized areas in the dorsal visual stream, whereas IFJ has predominant functional connectivity with feature- or object-encoding areas in the ventral visual pathway.” (Soyuhos and Baldauf, 2022, p. 2)
“In the next step of the MEG preprocessing pipeline, ICA was used this time to remove the artifacts related to eye movements, blinks, and heartbeats from the signal.” (Soyuhos and Baldauf, 2022, p. 4)
“frequencies of interest were the delta (1-4 Hz), theta (4-8 Hz), alpha (8-13 Hz), beta (13-30 Hz), and gamma (30-100 Hz) band” (Soyuhos and Baldauf, 2022, p. 5)
“directionality analyses between FEF, IFJa, IFJp, and all the ROIs” (Soyuhos and Baldauf, 2022, p. 5)
“We did not average the connectivity values of aIFJ and pIFJ before statistical analyses since we suspected them of having different functional connectivity fingerprints based on previous evidence (Baker et al., 2018; Bedini & Baldauf, 2021).” (Soyuhos and Baldauf, 2022, p. 5)
“FEF has robust functional connectivity with the regions in the dorsal visual stream, whereas IFJa has stronger functional connectivity with the areas in the ventral visual stream independently of lateralization and frequency band” (Soyuhos and Baldauf, 2022, p. 7)
“FEF has a robust power correlation with the dorsal visual stream in beta and gamma bands.” (Soyuhos and Baldauf, 2022, p. 7)
“IFJa has a strong power coupling with the ventral visual stream in delta, beta, and gamma oscillations.” (Soyuhos and Baldauf, 2022, p. 7)
“FEF is phase coupled with superior parietal lobule (SPL) and IPS in the beta band, while IFJa is phase-coupled with the inferior and middle temporal cortex by delta and gamma oscillations” (Soyuhos and Baldauf, 2022, p. 7)
“IFJp has weaker functional connectivity to the middle and ventromedial temporal cortex, particularly in the alpha and beta frequencies” (Soyuhos and Baldauf, 2022, p. 7)
“areas V7, V3B, MT, V8, PH, FFC, PIT, and VVC do not show predominant connectivity either with FEF, IFJa, or IFJp” (Soyuhos and Baldauf, 2022, p. 7)
“FFC is significantly power coupled with IFJa and IFJp, but not to FEF” (Soyuhos and Baldauf, 2022, p. 10)
“IFJa has a consistent robust power correlation with the ventral visual stream.” (Soyuhos and Baldauf, 2022, p. 10)
“In the alpha band, we instead observed that the seed regions, particularly IFJa and IFJp, predict the intrinsic neural activity in both visual streams except areas 7AL, 7PL, and VIP in the dorsal stream.” (Soyuhos and Baldauf, 2022, p. 10)
“While left IFJp feeds information to left FEF and left IFJa mainly in the theta band, the same direction of interaction in the right hemisphere is driven through both alpha and beta oscillations. Notably, the directed interaction from right IFJp to right FEF in the alpha band is highly significant” (Soyuhos and Baldauf, 2022, p. 10)
“spontaneous activity from FEF to IFJa and IFJa to FEF are subserved by delta and alpha oscillations” (Soyuhos and Baldauf, 2022, p. 10)
“IFJa has more substantial power and phase relation with the feature or object encoding regions in the ventral visual pathway” (Soyuhos and Baldauf, 2022, p. 11)
“The spatial versus non-spatial to-be-attended or to-be-remembered stimulus domain might respectively segregate plPFC into a functionally specific dorsal versus ventral visual pathways.” (Soyuhos and Baldauf, 2022, p. 11)
“Since functional coupling between distant regions requires a slower ‘clock’ (Jensen & Colgin, 2007), delta oscillations might subserve the intrinsic functional connectivity between IFJ and the areas in the ventral visual stream in the absence of attention to features or objects.” (Soyuhos and Baldauf, 2022, p. 13)
“Within the right hemisphere, alpha and beta oscillations govern these intrinsic directional influences from IFJp to the other seed regions” (Soyuhos and Baldauf, 2022, p. 14)
“IFJp feeds information to FEF and IFJa in the resting state” (Soyuhos and Baldauf, 2022, p. 14)
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Created: 2026-04-06 10:25
Source. Functional connectivity fingerprints of the frontal eye fields and inferior frontal junction in the dorsal vs. Ventral prefrontal cortex. Neuroscience. https://doi.org/10.1101/2022.06.04.494797