Update 'README.md'

README.md

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 # RSC_HPC
 
-Calcium fluorescence signals of hundreds of simultaneously imaged neurons in mouse retrosplenial cortex during a virtual navigation task, from different experimental groups of animals: control mice, mice with unilateral hippocampus lesion, and mice with bilateral hippocampus lesions.
+Calcium fluorescence signals of hundreds of simultaneously imaged neurons in mouse retrosplenial cortex during a virtual navigation task (running on a linear treadmill track with head-fixed), from different experimental groups of animals: control mice, mice with unilateral hippocampus lesion (uni), and mice with bilateral hippocampus lesions (bi).
+
+data structure explained below:
+
+behavior.
+ts:	time stamp in second
+pos_norm: normalized position (0~1, circular) for each trial
+trial: trial number
+speed: movement speed, in cm/s
+speed_raw: raw running speed, extracted directly from encoder pulses
+pos_cum: cumulative position (cm) for the entire session
+pos_raw: raw position (cm) for each trial
+
+
+imaging:
+
+ratio: dF/F (%), nSamples x nCells
+deconv: deconvolved calcium signal (%), nSamples x nCells
+tt: time stamp in second
+
+avgstack: mean stack image