[Key Words]

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Imagine someone walking an empty quiet sunny street. The sounds of the city are hushed while he thinks of yesterday. Another person walking barefood nearly caught up to the first person and that person, ergrossed in thought as well, accedinetially kicks some waste on the street, a plastic lid of a cup of coffee lying on poros asphalt. First it jams, then shoots ahead but only to slow down as sudden, as it started moving and stopping a meter behind and half a meter left of the person ahead.

What might go on with that person? Naivly we know the unfamliar and context-unfamliar scratchy sound gets conscious like an unexpected flash. Kind of coincidentally a surprised and puzzeld cognition process takes place reflecting a space-time continuum and an object-analysis of the auditive stimulus and the context by that person. Also kind of coincidentally and somehow ingeniously calculated and coordinated, the person, slightly faster, than he is used to move, he turns his head leftward down and focuses his visual attention to a spot on the street where he could had spotted an object that would have lurched him. Meanwhile he does not change his walking behaviours, the head remaines hardly perceivable at posture and returns while the person might think “huh?…plastic!…oh, someone is walking behind me… …I want a coffee… ”

[Key Words] 

working memory, stimulus selection, prefrontal cortex, parietal cortex, superior colliculus, vision 

screens: Fundamental Components of Attention. Knudsen, Eric. 2007

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