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A yawn is a reflex in vertebrate animals characterized by a long inspiratory phase with gradual mouth gaping, followed by a brief climax (or acme) with muscle stretching, and a rapid expiratory phase with muscle relaxation, which typically lasts a few seconds.
Yawning often feels involuntary—it’s triggered by the same part of the brain as sneezing, Sullivan says. But the difference is, a yawn can be controlled from “the top down” if you think ...
Constitutional theories in psychology (e.g., Sheldon, Kretschmer) emphasize the relationship between body structure and temperament. These theories have been around since Hippocrates thought that body structure goes hand in hand with the temperament and susceptibility to certain diseases.
Several comfort behaviours are associated with the beginning of a rest period (e.g. grooming), whereas others are associated with the end of a rest period (e.g. stretching), possibly to prepare the body for escape or
Merely thinking about or seeing someone yawning can make you yawn. But why?
In a new study, researchers from the University of Nottingham looked at the brain to determine what makes yawning contagious. The BBC reports it happens in the part of the brain that controls ...
Cognitive flexibility [note 1] is an intrinsic property of a cognitive system often associated with the mental ability to adjust its activity and content, switch between different task rules and corresponding behavioral responses, maintain multiple concepts simultaneously and shift internal attention between them. [1]
Biologists led by a professor from SUNY Oneonta are saying that there may be a connection between intelligence and the length of yawning.