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The data, which can be visualized, were summarized in the publications listed just below: 

      1) Epelboim, J. et al.   (1995) Vision Research, 35, 3401-3422. 

      2) Epelboim, J. et al.   (1997)     "          "           37, 2597-2607. 

      3) Epelboim, Julie        (1998)     "          "           38, 3773-3784. 

      4) Malinov, I. V. et al. (2000)     "          "          40, 2083-2090. 

      5) Herst, A. N. et al.    (2001)     "          "          41, 3307-3319.

This research was made possible by use of a unique recording system, the Maryland Revolving Field Monitor, MRFM (see reference 1 for details). 

The MRFM uses a cube-surface field coil arrangement (2.14 m on a side) and a phase-detection method, which employs three frequency-coded, revolving magnetic fields (976, 1952 and 3904 Hz), to measure roll, pitch and yaw angles of the head with respect to spatial coordinates, as well as horizontal and vertical gaze, i.e., eye angles with respect to space. 

Human adults serve as subjects. They wear  SKALAR/Delft sensor coils on both eyes and an orthogonal pair of sensor coils on their heads. 

Angle data are collected at 976 Hz, averaged, and then stored at 488 Hz. Noise in the angle data  = 1 minarc. Linearity of the angle data = 0.01% within the 360 degree recording field. 

Translations (XYZ) of the head and the positions of objects within the work space are measured by acoustical propagation. Head translation measurements have an effective bandwidth of 31 Hz. 

The accuracy of measurements of the location of objects within this workspace is about 0.2 mm,. The accuracy of head translations, which depends on attaching a sparker to the subject's head, is about 1 mm. 

Download the Adobe PDF version of the Technical Report:

The Maryland Revolving-Field Monitor: Theory of the Instrument and Processing Its Data.


See subjects in the MRFM.

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