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Eidetic Imagery

Eidetic imagery is the ability to retain an accurate visual image of a complex scene or pattern shortly after looking at it. The scene can then be described in detail for a short time. Eidetic imagery is a trait possessed by about 5% of children. The ability to form eidetic images is very rare past adolescence.

To produce an eidetic image, a person must study a scene for some time and must actively concentrate on this scene to retain it in memory. These images fade quickly when the attention is diverted to something else. Naming or identifying parts of the scene tend to interrupt the ability to form an eidetic image. Thus it is very difficult to form an eidetic memory of text.

Sometimes eidetic imagery is called photographic memory. This term is not exactly accurate because this type of memory is not formed like a photograph; eidetic images can be fragmentary and are not necessarily more accurate than normal memories. Additionally, photographic memory is a learned skill rather than a trait you are born with. For example, some people demonstrate impressive memory abilities, with feats like

memorizing the number pi out to thousands of digits. Sometimes these people are described as having photographic memories. In reality, photographic memory is simply the successful application of effective memory techniques. In that respect, photographic memory is a learned skill that you can eventually acquire. Email to a Friend

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ADAPTING TO THE ENVIRONMENT: CHANGING INSTINCTIVE BEHAVIOUR

A key feature which distinguishes mammals from the reptiles from which they evolved would seem to be that the mammalian brain contains organs for the experience-based recognition of danger and for responding to this according to past experience. And for some conscious feelings about events.

Millions of neural pathways connect the organs which generate experience-based memories, and also those which generate conscious feelings with associated behavioural response patterns, to the reptilian parts of the mammalian brain.

It seems that feelings such as attachment, anger and fear have emerged with associated behavioural response patterns, and that behaviour is less rigidly controlled by instincts.

So it seems that instinctive behaviour can be modified by feelings of care and affection and also by experience, particularly when repeated frequently.

Neural pathways are created and strengthened by being used, others weakened by not being used. We react accordingly and it seems as if memories are being created which modify instinctive behavioural responses.

It also seems that instinctive behaviour has to be controlled, and modified according to the environment in which we find ourselves, in every generation, and that the mammalian and human parts of the brain play a major part in this.

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