PSYCH 120A Chapter Notes - Chapter 11.2: Transcranial Magnetic Stimulation, Occipital Lobe, Stimulus Modality
Document Summary
Many of the structures required for vision are crucial for imagery. High activity in the occipital cortex when visualizing a stimulus and when actually viewing an object. V1 and v2 are involved in early stages of visual perception responding to specific low level features of input. Same areas are active when participants are maintaining highly detailed images. Activation increases as participants imagine larger and larger objects. Researchers developed techniques to decode patterns of brain activation in people holding visual images can decode brain activity into images. Transcranial magnetic stimulation (tms) creates strong magnetic impulses at a specific location on the scalp causing temporary disruption in brain region. Causes problem in vision and in visual imagery when v1 disrupted. Some brain damage disrupted ability to perceive color and imagine scenes with color. Blind individuals produce response times proportional to the distance traveled and rotation needed in the image. Have some other way of thinking about spatial layout and relationships.
