update

README.md

@@ -27,6 +27,11 @@
   covered distance, which should be ignored during analysis. These jumps are not due to 
   the behavior of the animals. See also Figure 1–Figure supplement 1.
   
+  In some trials technical problems occurred, e.g., the treadmill stuck. These were left 
+  out of in the arrays comprising trial information like time points. The *spike times* 
+  and *distance covered* still include these parts, since these are continuous signals 
+  that extend throughout the whole session. 
+  
   Data is saved in [nix](https://github.com/G-Node/nix/wiki) format, which uses 
   [HDF5](https://www.hdfgroup.org/solutions/hdf5/) as a backend. See
   > Stoewer A, Kellner CJ, Benda J, Wachtler T and Grewe J (2014).