In an fMRI experiment conducted by Murray et al. (2006) where the researchers studied the brain's response to ponzo illusion, it was found that:
A) the objects and surfaces near the point toward which a person heads move outward slowly in the retinal image.
B) when the object is perpendicular to the line of sight, the retinal image has the same trapezoidal shape as the object.
C) there is a larger area of activity in V1 when the participants were fixating at the center of the "large" sphere than when they were fixating at the center of the "small" one.
D) the depth cues of linear perspective and texture gradients lead to the perception of two same-sized spheres.

Question

Quizplus · Accepted Answer

The study by Murray et al. (2006) on the ponzo illusion using fMRI showed increased activity in the primary visual cortex (V1) when participants viewed what appeared to be a larger sphere compared to a smaller one, despite the spheres being the same size. This demonstrates how the brain's perception of size can be influenced by visual context, leading to increased neural activity even when the physical size of the stimuli does not change.

In an FMRI Experiment Conducted by Murray Et Al