Improvements to the sensitivity of gravitational clustering for multiple neuron recordings

We outline two improvements to the technique of gravitational clustering fo r detection of neuronal synchrony, which are capable of improving the metho d's detection of weak synchrony with limited data. The advantages of the en hancements are illustrated using data with known levels of synchrony and di fferent interspike interval distributions. The novel simulation method desc ribed can easily generate such test data. An important dependence of the se nsitivity of gravitational clustering to the interspike interval distributi on of the analysed spike trains is described.