Are emotions capable of influencing our thinking? Where is their source? Those are the questions that are subject of a scientific research in the present paper, which has, as its aim, an interdisciplinary analysis of emotional states related to cognitive processes. The newest neuroscientific discoveries supply a lot of interesting information with regard to the human brain and central nervous system and their relationship with the higher mental functions like planning or knowledge. This research points out to a reciprocal influence between emotional states and cognitive processes, which is a step forward in the mind-body problem discussion.