Abstract
Introduction: Spatial orientation refers to the fact that the brain
integratively recognizes its own position, posture and motion in space
through several sensory systems. Vestibular, visual and somatosensory
inputs with various motion are constantly integrated in central nervous
system to determine the spatial orientation. Among the various
parameters of spatial orientation, there has been no study about tilt
perception and the memory of tilt perception. Methods: The following
subjects participated in these experiments; normal volunteers under 65
years of age (Control group) and bilateral no response to the Caloric
test (Bilateral group). Procedure was measurement of the short term
memory of tilt perception that were reproduction of 0°and reproduction
of right by 5°and left by 5°with improved electric goniometer. Results:
Control group: There were no significant differences in the time course,
or right and left direction of tilt for any of the age groups. Bilateral
group: There were no significant differences in any of the tasks in the
procedures between the control group and the bilateral group.
Conclusion: Although tilt perception is formed from the vestibular and
somatosensory input, it became clear that the vestibular are less
important than the somatosensory input, because the bilateral group
could also successfully remember tilt positions. It also is clear that
such information is remembered for at least a short period of time.