There is no doubt that observing a person's mouth while speaking helps us to understand it. The brain area where both information – sound and movement – are combined is called the superior temporal sulcus. And that is where the illusory McGurk effect also appears: when someone moves their lips, but the acoustic signals they emit are different, we perceive something unreal. In other words, if what we see does not match what we hear, our mind misrecodes the message.
The fleshy gateway to the mouth is one of the most delicate and sensual parts of our anatomy. Their high sensitivity makes full lips a fantastic element for lovers, but they are not only used for kissing or eating … Did you know that the gesture of sniffing is not exclusive to humans? Do you know the function of smiles? Is lip color important? How do the forensic police study lip prints?
