Sensorimotor and Sex Influence on Spatial Orientation when Sitting and Standing

Area of Science:

• Neuroscience
• Human Physiology
• Psychophysics

Background:

• Vestibular disorders and central nervous system conditions can impair spatial orientation.
• Visual field dependence, a tendency to misalign objects due to surrounding visual cues, can exacerbate orientation issues.

Purpose of the Study:

• To investigate how sensorimotor factors and sex influence spatial orientation.
• To compare performance on the Rod-and-Frame test in sitting versus standing positions.
• To assess the test-retest reliability of the Rod-and-Frame test in healthy young adults.

Main Methods:

• Twenty-four healthy young adults (12 males, 12 females) participated.
• Participants completed the Rod-and-Frame test twice, one week apart, in a dark room.
• The test involved aligning a rod horizontally/vertically with and without a tilted frame, in both sitting and standing postures.

Main Results:

• Participants exhibited greater visual field dependence when sitting compared to standing, particularly with a clockwise frame tilt.
• Females showed significantly higher visual field dependence than males in sitting conditions (both clockwise and counterclockwise frame tilts).
• Test-retest reliability was good across all conditions, indicating the test's robustness.

Conclusions:

• Increased sensorimotor input (standing) reduces susceptibility to visual distortion.
• Females are more affected by visual distortion than males when sitting.
• The Rod-and-Frame test is a reliable tool for evaluating spatial orientation and visual field dependence.