Skip to main content
placeholder image

Shock-like haemodynamic responses induced in the primary visual cortex by moving visual stimuli

Journal Article


Abstract


  • It is shown that recently discovered haemodynamic waves can form shock-like fronts when driven by stimuli that excite the cortex in a patch that moves faster than the haemodynamic wave velocity. If stimuli are chosen in order to induce shock-like behaviour, the resulting blood oxygen level-dependent (BOLD) response is enhanced, thereby improving the signal to noise ratio of measurements made with functional magnetic resonance imaging. A spatio-temporal haemodynamic model is extended to calculate the BOLD response and determine the main properties of waves induced by moving stimuli. From this, the optimal conditions for stimulating shock-like responses are determined, and ways of inducing these responses in experiments are demonstrated in a pilot study.

UOW Authors


  •   Lacy, T C. (external author)
  •   Aquino, K M. (external author)
  •   Robinson, Peter (external author)
  •   Schira, Mark

Publication Date


  • 2016

Citation


  • Lacy, T. C., Aquino, K. M., Robinson, P. & Schira, M. M. (2016). Shock-like haemodynamic responses induced in the primary visual cortex by moving visual stimuli. Journal of the Royal Society Interface, 13 (125),

Scopus Eid


  • 2-s2.0-85011585825

Volume


  • 13

Issue


  • 125

Abstract


  • It is shown that recently discovered haemodynamic waves can form shock-like fronts when driven by stimuli that excite the cortex in a patch that moves faster than the haemodynamic wave velocity. If stimuli are chosen in order to induce shock-like behaviour, the resulting blood oxygen level-dependent (BOLD) response is enhanced, thereby improving the signal to noise ratio of measurements made with functional magnetic resonance imaging. A spatio-temporal haemodynamic model is extended to calculate the BOLD response and determine the main properties of waves induced by moving stimuli. From this, the optimal conditions for stimulating shock-like responses are determined, and ways of inducing these responses in experiments are demonstrated in a pilot study.

UOW Authors


  •   Lacy, T C. (external author)
  •   Aquino, K M. (external author)
  •   Robinson, Peter (external author)
  •   Schira, Mark

Publication Date


  • 2016

Citation


  • Lacy, T. C., Aquino, K. M., Robinson, P. & Schira, M. M. (2016). Shock-like haemodynamic responses induced in the primary visual cortex by moving visual stimuli. Journal of the Royal Society Interface, 13 (125),

Scopus Eid


  • 2-s2.0-85011585825

Volume


  • 13

Issue


  • 125