Why are certain images more likely to be experienced than others during dreams, according to the activation-synthesis hypothesis?

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The activation-synthesis hypothesis suggests that PGO (ponto-geniculo-occipital) activity, in combination with other neural activity, produces random and unpredictable dreams. This theory proposes that the brain attempts to create meaning from these random cortical activations, resulting in dream content. Certain images may be more likely to be experienced due to priming by other neural activity.

Why Are Certain Images More Likely to Be Experienced Than