Precise temporal dynamics of ripple events support order memory in human hippocampal-cortical circuits

This dataset contains intra-cranial EEG (iEEG) recordings related to the paper: "Precise temporal dynamics of ripple events support order memory in human hippocampal-cortical circuits" by Seger et al.

The files in this dataset were saved as .MAT files. 

The dataset includes the following zip files:

1. “Hippo.zip" 

2. “OFC.zip" 

3. “PCC.zip" 

4. "MatlabCode.zip"

Zip file "MatlabCode.zip" contains the MATLAB code used to extract the ripple signal and detect ripple onset and offset times 

A descrition of each matlab script is given below:

1. "get_rippleSignal_norman.m": functon that extracts ripple band signal according to Norman et. al 2019
2. "get_rippleSignal_vaz.m": function that extract ripple band signal according to Vaz et. al 2019.
3. "rippleDetector_norman.m": function that detects ripple onset and offset time according to Norman et. al 2019 and extracts phase at ripple onset.
4. "rippleDetector_vaz.m": function that detects ripple onset and offset time according to Vaz et. al 2019 and extracts phase at ripple onset.

Zip files “Seger_et_al_2025_Hipp.zip", “Seger_et_al_2025_OFC.zip", and “Seger_et_al_2025_PCC.zip" contain the electrode data for the three brain regions that were evaluated in this paper hippocampus (Hipp), orbitofrontal cortex (OFC), and posterior cingulate cortex (PCC). Each zip file contains a collection of '.mat' files. Each '.mat' file has the data for a single electrode. The name of the file gives the subject ID number and the specific electrode number for the data in that file. 

The data structure for all '.mat' files contained in '.zip' files 1-3 is idendical and described below:

1. "EEG_SESSION" : contains the raw EEG over the extire experimental session (sampled at 1000 Hz).

2. "encoding_itemLevel": contains an event structure with item level information during encoding. A decription of the event structure subfields is as follows:

list: list number for the item
serial position: serial position of item at encoding
decode_serialpos: serial position of item at retrieval
condition: behavioral classification of item
start_offset: offset within EEG_SESSION where this item begins
end_off: offset within EEG_SESSION where this item ends

3. "encoding_listLevel": contains an event structure with list level information during encoding. A description of the event structure is as follows:
list:

list number for the list
condition: cell structure containing the behavioral classification for all items in the list
start_offset: offset within EEG_SESSION where this list begins
end_off: offset within EEG_SESSION where this list ends
numCorrect: the number of behavioral item classified as correct for the list.

4. "encoding_listLevel": contains an event structure with list level information during encoding. The fields of the event structure are identical to "encoding_listLevel".