Before revision: Standard artificial neural networks  model key cognitive aspects of brain function , such as learning and classification, but they do not model the affective (emotional) aspects ; however primary and secondary emotions play a key role in interactions with the physical, ecological, and social environment. These emotions are associated with memories when neuromodulators such as dopamine and noradrenaline affect entire patterns of synaptically activated neurons. Standard artificial neural networks (ANNs) do not model this non-local effect of neuromodulators, which are a significant feature in the brain (the associated `ascending systems' have been hard-wired into the brain by evolutionary processes).
After revision: Standard artificial neural networks model key cognitive aspects of brain function , such as learning and classification, but they do not model the affective (emotional) aspects of brain function. However these are a key feature of the brain (the associated `ascending systems' have been hard-wired into the brain by evolutionary processes).