Origin of torsional eye movements

  • riMLF burst neurons cause the contraction of eye muscles which not only rotate the eye vertically but also torsionally.
  • The two sides are not equal.
  • riMLF neurons on the right side act on muscles with a clockwise (CW) action (as seen in the figure).
  • Those on left act on muscles with counterclockwise (CCW) action.
  • Neurons in the INC tonic produce a tonic component which keeps the eye position deviated from center both vertically and torsionally

Copywrite 1996 Tutis Vilis and Douglas Tweed
Department of Physiology
University of Western Ontario
London Ontario Canada
Updated October 01, 1996

Comments welcome. Email to tvilis@physiology.uwo.ca