The autism was not prone to intention ‘violation’

The role of the OFA within this model is thought to
process invariant information before FFA and will focus on facial features. One
study shows that repeated TMS targeted at the OFA disrupted accurate
discrimination of face parts but had no effect on the discrimination of spacing
between these parts, suggesting that OFA processes face-part information at an
early stage in the face processing system and that it could be the entry point,
with information then perhaps being sent to a further region such as the FFA (Pitcher
et al., 2007). A further prediction of Haxby et al.’s (2000) model is that STS
is the part that responds to variable characteristics of faces such as eye
gaze, expression and lip movement. Individuals who suffer with autism have the
inability to use eye gaze to establish joint attention and comprehend the
mental states and intentions of other people, Pelphrey et al (2005) found that
STS in autism was not prone to intention ‘violation’ as in the control group. STS
was also more activated when selectively attending to eye gaze rather than face
identity, providing evidence for the distinctiveness between that and FFA. Additionally,
STS has been localised and disrupted using repeated TSM (Grossman, Battelli and
Pascual-Leone, 2005) when placed over the right STS the interruption weakened biological
motion perception, signifying STSs fundamental part in inferring dynamic
information and having instinctual meaning following face perception. It is
also thought that the activation of STS is from generic, and not face specific,
stimuli conveying intention. Golarai, Grill-Spector and Reiss (2006) support
this claim as activation when simple geometric shapes convey intention. Although
further research has shown that STS Is active in response to moving and
stanionary eyes and mouths, but not by moving checkerboards or contracting
circles (Puce et al, 1998). Although, Haxby et al.’s (2000) prediction is that
the STS is essential for responding to signals important to potential
behaviours after face perception, therefore the specificity of STS is
unimportant at this stage. The detachment of neural structures has been shown
by Hoffman and Haxby (2000) using fMRI and TMS, identity of individual was
primary associated with FFA/OFA and gaze STS. 


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