TB6 B&B Lecture 1 MCQ; Object recognition

1. What happens to the size of the receptive fields of ventral stream neurons across the stream?

The receptive field size increases and responses shift towards more complex features
Each receptive field is differentially sensitive to specific stimuli
The receptive field size decreases and responses shift towards less complex features
There is no change in receptive field size across the stream

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Deficits at a perceptual level. Patients often are better at drawing from memory rather than copying an object's form directly and have preserved colour/brightness perception
Deficits at the attribution level, where the percept is given meaning by being linked to previous experience. There is accurate copying from vision, but poor drawing from memory

Intact objects elicited more of a response than scrambled objects in the LOC
Responses were contrasted to scrambled v.s intact object images. The LOC showed to adapt to the same shape with the same occluding contours
Responses were contrasted to scrambled v.s intact object images. The LOC showed to adapt to the same shape with different occluding contours
Scrambled objects elicited more of a response than intact objects in the LOC

Pps with right parietal lobe lesions performed poorly on spatial tasks (maze) and well on face/object recognition, whereas pps with right temporal lobe lesions performed opposite
Pps with right temporal lobe lesions performed poorly on spatial tasks (maze) and well on face/object recognition, whereas pps with right parietal lobe lesions performed opposite
Pps with right parietal lobe lesions could not perform either the spatial or object recognition tasks, whereas the pps with right temporal lobe lesions could
Neither groups of lesioned pps could perform at control level on both face/object recognition and spatial (maze) tasks

Damaged dorsal stream. (Apperceptive agnosia) Could say whether two shapes were the same or not. Could not adjust aperture of fingers correctly when reaching for objects.
Damaged ventral stream. (Apperceptive agnosia) Could not say whether two shapes were the same or not. Could adjust aperture of fingers correctly when reaching for objects.
Damaged dorsal stream. (Apperceptive agnosia) Could not say whether two shapes were the same or not. Could adjust aperture of fingers correctly when reaching for objects.
Damaged ventral stream. (Apperceptive agnosia) Could say whether two shapes were the same or not. Could not adjust aperture of fingers correctly when reaching for objects.