視覚誘発性自己回転感における男女差

抄録

Vestibular function gradually deteriorates with aging, however, its behavioral consequences are not easily recognized due to a substitution process by other sensory modalities such as visual or proprioceptive inputs. Not only age but also gender can make a significant difference in these functions. To reveal such hidden substitution processes by visual signals, the measurement of the static as well as the dynamic subjective visual vertical was performed in 65 healthy subjects of different age. The static subjective visual vertical was found to be stable among all subjects, whereas the shift of the dynamic subjective visual vertical during rotation of the background scene gradually increased with age. There was a significant difference between males and females in this trend. Females usually showed greater deviation with increased age. This finding indicates that the hormonal differences between genders make a difference in generation and recognition of roll vection.