Fig. 6

A Exemplary section of the self-navigation signal with the computed trigger points, measured in a representative wild-type mouse (1. flow-encoding measurement). The signal modulations due to cardiac and respiratory motions are clearly recognizable. B Mean values and variations of the cardiac periods for the 40 individual flow-encoding measurements (total measurement time: 32 min), obtained in the same mouse. Each data point represents an interval of 48 s. The mean variation of the cardiac periods found in this measurement was \( \overline{\sigma} \) = ±3.4 ms