"We identified in the autistic model a key system in the temporal lobe visual cortex with reduced cortical functional connectivity. This region is involved with the face expression processing involved in social behaviour. This key system has reduced functional connectivity with the ventromedial prefrontal cortex, which is implicated in emotion and social communication".
The researchers also identified in autism a second key system relating to reduced cortical functional connectivity, a part of the parietal lobe implicated in spatial functions.
They propose that these two types of functionality, face expression-related, and of one's self and the environment, are important components of the computations involved in theory of mind, whether of oneself or of others, and that reduced connectivity within and between these regions may make a major contribution to the symptoms of autism.If one has difficulty interpreting face expressions, one has difficulty properly interacting with people. One is even likely to engage in socially inappropriate behaviors and conversations.
The article mentions those areas with weak connections, but one wishes they also mentioned those areas with stronger connections. I am certain those areas provide as much information about the symptoms of autism as do the weak ones.