Outline 4.0 Results
- 4.1 Global Connectivity Patterns
- validation of seed regions (FEF, IFJa)
- 4.2 Testing the “Where” Stream (FEF Connectivity)
- Motion Areas reinnhemen MT/MST
- 4.3 Testing the “What” Stream (IFJa Connectivity)
- Strong connection to semantic system
- vergleichen mit IFJp
- vergleichen mit 44/45/47l
- 4.4 Resolving Ambiguities
- whether A5 aligns more with IFJ or FEF
- PSL alignment
- STV alignment
4.0 Results
4.1 Global Connectivity Patterns
4.1.1 FEF vs. IFJa connectivity
In the analysis we compared the two seed regions FEF and IFJa in both hemispheres. Looking at functional connectivity with full correlation we found high correlation of FEF to spatial auditory areas according to Rolls et al. (2023) - Cerebral Cortex where 7AL, 7Am, 7PC might play a role in spatial orientation within the auditory where-stream. This connectivity might be running via the SLF2 (Superior Longitudinal Fasculus), partly SLF3 (Bedini (n.d.)), which mediates spatial-motor and auditory communication.
First if we look at functional connectivity we see a clear pattern that connects the FEF to the Where-pathway and auditory areas.
Left vs right hemisphere, full connectivity
Als Null-Seed, der beweist, dass es wirklich um IFJa geht und im posterior part nichts passiert.
FEF vs IFJp:
Link zum Original
Transclude of 4.2-Testing-the-"Where"-Stream-(FEF-Connectivity)#42-testing-the-where-stream-fef-connectivity
Transclude of 4.3-Testing-the-"What"-Stream-(IFJa-Connectivity)#43-testing-the-what-stream-ifja-connectivity
4.4 Resolving Ambiguities
A4 and A5
anatomic locations of A4 and A5 are in the parabelt cortex and are in the posterior part of the superior temporal gyrus (STG). They form the transition from early auditory cortex to specialized streams. In luterature they are being reffered as to the starting point of the dorsal stream (Quelle benötigt). Nach Rolls ist es unsicher, ob A5 zu Where oder zum What pathway gehört, da A5 sowohl connectivity zu Area 44 und IFJa zeigt, als auch zu MT und MST, welche klar zum where-pathway des visuellen streams gehören.
A4
In Glasser et al. (2016) - Nature A4 is defined as functionally different from its neighbours:
- in contrast to STV, A4 shows a weaker connectivity to visial area PCV
- also weaker connectivity to 55b than PSL
PSL the division
PSL (perisylvian Language Area) is located at the intersection of temporal and parietal lobe in the sylvian region. In the cluster of Glasser et al. (2016) - Nature PSL is classified as a semantic group (Group 3), that process auditory information and integrates it into the language system.
According to Dureux (2024) PSL is unresponsive to all tested auditive stimuli.
- unresponsive to all tested auditive stimuli according to Dureux (2024) auch
in contrast to STV, we see
STV surprise
Link zum Original
