Some differences were also found, with post-cues leading to higher activity in right middle frontal gyrus. These neuroimaging data suggest that some common neural mechanisms underlie selective spatial attention and readout from iconic memory. Their results demonstrate that the duration of iconic memory is not inversely related to stimulus duration or stimulus intensity. We also found common bilateral activation of a fronto-parietal network for post-cue and pre-cue trials. Pre- and post-cues led to similar activity modulations in lateral occipital cortex, contralateral to the cued side, indicating that readout from iconic memory can have similar neural effects to spatial attention. Human memory involves the ability to both preserve and recover information. There are three major processes involved in memory: encoding, storage, and retrieval. The relevant hemifield for partial report was indicated by an auditory cue, administered either before the visual array (pre-cues, spatial attention) or shortly after (post-cues, iconic memory). Memory refers to the psychological processes of acquiring, storing, retaining, and later retrieving information. Participants judged three visual stimuli in one hemifield of a bilateral array comprising six stimuli. Echoic (sound) memory lasts for about 3 to 4 seconds and is important in speech and communication. Here we provide fMRI evidence for some common underlying neural effects. The impression of light along the sparkler’s path remains in our iconic memory creating the illusion of a trail of light behind the sparkler. Iconic memory and spatial attention are often considered as distinct topics, but may have functional similarities.
0 Comments
Leave a Reply. |