To examine how neural representations evolved throughout movement planning, execution, and suppression, we performed time-resolved multivariate pattern analysis (MVPA).
Fast-spiking interneurons contribute to action execution and suppression of unwanted movements (Gage et al., 2010), and have been implicated in dystonic-like postures (Gittis et al., 2011).
"Even with all the executions and suppression, the regime has not been able to get rid of us," she said.
We found that facilitation neurons were only half as active for action observation as for action execution, and that suppression neurons reversed their activity pattern and were actually facilitated during execution.
Many of these studies have investigated the shared neural activation during action execution and observation by measuring alpha suppression over the sensorimotor areas using electroencephalography (EEG) (Marshall et al., 2011, Southgate et al., 2009, Southgate et al., 2010, van Elk et al., 2008, Virji-Babul et al., 2012).
We selected the two main subgroups of PTNs: facilitation mirror neurons that were also facilitated during execution (n = 20 F-F type PTNs, red traces in Figure 3C) and suppression mirror neurons, which reversed their firing pattern and were also facilitated during execution (n = 7 S-F PTNs, blue traces).
As mentioned above, if direct and indirect pathways converge at the GPi, this would predict that the execution process is driven by an active competition between facilitation and suppression signals, which is naturally implemented in diffusion models with the drift rate parameter which captures a moment-by-moment competition between a hypothesis and its alternative.
See Appendix B for topographical plots depicting the scalp distribution of sensorimotor alpha suppression during the execution and observation of arm and leg movements for the infant participants.
Therefore, the present study aimed to compare the scalp distribution of sensorimotor alpha suppression during the execution and observation of arm and leg movements in 12-month-old infants and a control group of adults.
The present study extends this work by investigating the somatotopic organisation of sensorimotor cortex, as measured by sensorimotor alpha suppression, during both action execution and observation in 12-month-old infants.
There are three modes for the explosion suppression experiments: complete suppression mode, partial suppression mode and suppression failure mode.
