There were significant positive correlations for activation at the right inferior parietal lobule and the angular gyrus
for happy faces, in the left fusiform gyrus and the right posterior insula for sad faces, and in the left parietal lobule for angry faces.
Next-door, the angular gyrus
(a gyrus is a "ridge" in the brain) helps to make sense of the words and letters we come across when reading.
The supramarginal gyrus (SM) is therefore, longer than it is tall and the angular gyrus
(ANG) is more posterior and inferior.
The brain pathway for normal reading has also been identified (from visual area to angular gyrus
to Wernicke's area to Broca's area), as have the sequences involved in memory storage.
In Geschwind's model the grammatical and lexical representations of language arise in the superior temporal gyrus (Wernicke's area) of the LH, and these representations are transformed via a band of association fibers that course around the sylvian lip through the angular gyrus
and into the frontal lobe, terminating in the third frontal convolution of the LH (Broca's Area).
The left angular gyrus
was therefore linked to memories of visual word forms that are required for both reading and writing.
They found that voice-face recognition activated specific "cross-modal" regions of the brain, located in areas known as the left angular gyrus
and the right hippocampus.
The right angular gyrus
showed no language-related activity in 11 individuals who had attained sign language proficiency as young adults, the researchers report.
1999) have identified the left angular gyrus
as the most probable site of a functional lesion in dyslexia and suggested that greater reliance on this region normally facilitates reading, but impairs reading in dyslexia.