Visual perceptions of head-fixed and trunk-fixed anterior/posterior axes

Experimental Brain Research
W G DarlingT E Williams

Abstract

The purpose of the present experiment was to determine the preferred visual "straight ahead" or anterior/posterior (a/p) axis at the perceptual level. The ability of 12 neurologically normal, young adult subjects to position a rod parallel to the head and trunk a/p axes while viewing eccentrically located visual targets were studied under six conditions: 1. fixed-subjects stood erect with the head aligned to the trunk and viewed a central target while visually aligning a hand-held rod to the head and trunk a/p axis. 2. eyes-subjects moved only their eyes to view eccentric targets and aligned the rod to the head and trunk a/p axis. 3. head-trunk-subjects viewed the eccentric targets by rotating the head about a vertical axis and aligned the rod to the trunk a/p axis. 4. head-head-subjects viewed the targets as in 3 and positioned the rod parallel to the head a/p axis. 5. trunk-head-subjects viewed the targets by rotating the trunk and head as a unit about the vertical axis and aligned the rod parallel to the head a/p axis (note that the head and trunk a/p axes were misaligned by the experimenter prior to target viewing). 6. trunk-trunk-subjects viewed targets as in 5 and positioned the rod parallel to the trunk a/p axis. Subject...Continue Reading

Citations

Dec 22, 2005·Experimental Brain Research·Michel GuerrazJean Blouin
Dec 16, 2006·Experimental Brain Research·W G DarlingA J Butler
May 4, 2001·Behavioural Brain Research·R D SeidlerG E Stelmach
Feb 18, 2004·Journal of Neurology, Neurosurgery, and Psychiatry·W G DarlingM Rizzo
Oct 28, 2006·Computers in Biology and Medicine·K Han KimBernard J Martin
Mar 31, 2000·Brain and Cognition·W G Darling, M Pizzimenti
Jun 12, 2003·Vision Research·Warren G DarlingMatthew Rizzo
Feb 20, 2003·Experimental Brain Research·Warren G Darling, Robert Bartelt

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