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I need an introduction (including hypotheses) for this report. This study involv
I need an introduction (including hypotheses) for this report. This study involved 2 MRI studies (event related and block) and 1 MEG study.
The MEG study was based on Perry & Singh. All studies involved 3 conditions: scenes, faces, and scrambled faces.
All the information included for background research:
•In the practical classes we will be analyzing data from two fMRI and one MEG experiment each using the same stimuli to identify face-selective responses in the brain
•Learning:
•learn about standard methods and analyses
•see how they are applied in different imaging techniques
•Scientifically:
•Relatively simple visual stimuli (images) are easily presented in neuroimaging
•Potentially engage cognitive processes:
•memory
•social
•emotional
•Prosopagnosia
•Damage to the ventral occipito-temporal cortex can cause a form of agnosia where patients are impaired in recognizing familiar faces
•selective: recognition of faces is impaired while other objects relatively unimpaired
•Individual neurons in monkeys
•STS (e.g., Perrett, cited in Perrett et al., 1992; Tsao et al., 2006)
•selective: cells fire to faces much more than other objects
•We expect regions specialized for face processing to be active in response to images of faces
•To establish selectivity must show that such responses are specific to faces – i.e., showing lower responses to non-face stimuli
•E.g., early visual cortex responds to face images, but also to a flashing checkerboard or any patterned/changing visual stimulus
•Some regions may respond to real images rather than patterns, but no more strongly to faces than other stimulus categories
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