Dorsal Periaqueductal gray ensembles represent approach and avoidance states

Each numbered folder corresponds to a mouse. Within each folder: 'neural_data.mat' is a struct containing 'C_raw', the raw CNMF-E output neural data. ______________________________________________________________________________________________ 'BehaviorMS.mat' contains a series of vectors or matrices. Pertinent to this study are: Rat sessions- -approachFrameMS and approachIndicesMS -stretchFrameMS and stretchIndicesMS -escapeFrameMS and escapeIndicesMS -freezeFrameMS and freezeIndicesMS EPM sessions- -openArmFrameMS and openArmIndicesMS -closedArmFrameMS and closedArmIndicesMS Additionally, the separate file 'headDip.mat' gives the headDipFrameMS and headDipIndicesMS for all head dips over the edge of the open arms of the EPM. All '*FrameMS' files give in/out points, aligned to the neural data, for each behavior. 'In' is column 1 and 'Out' is column 2. All '*IndicesMS' files give logical '0' or '1' values for whether a behavior is happening during a frame of neural data. _______________________________________________________________________________________________ 'Tracking.mat' is a struct containing the pertinent fields: FOR EPM, RAT, and TOY RAT, for each frame of neural data: 'mouse_positionMS', which provides the xy coordinates of the point between the mouse ears. 'mouseAngleMS' provides the angle in radians of mouse head direction. 'mouseVelMS' provides the frame-by-frame velocity of the mouse, in pixels per frame. FOR RAT and TOY RAT only, for each frame of neural data: 'rat_positionMS' provides the xy coordinates of the point between the rat ears. 'angleDiffMouseHeadDirRatMS' provides the difference in radians between the head direction of the mouse and the rat position. 'ratVelMS' provides the frame-by-frame velocity of the rat, in pixels per frame. 'distanceMouseRatMS' or 'distanceMouseToyRatMS' provides the distance in pixels between the mouse and rat.

每个带编号的文件夹对应一只实验小鼠。各文件夹内包含如下内容：
`neural_data.mat`：为结构体文件，其中存储有经CNMF-E输出的原始神经数据`C_raw`。
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`BehaviorMS.mat`包含多组向量或矩阵，本研究关注的字段如下：
- 大鼠任务相关字段：
- `approachFrameMS`与`approachIndicesMS`
- `stretchFrameMS`与`stretchIndicesMS`
- `escapeFrameMS`与`escapeIndicesMS`
- `freezeFrameMS`与`freezeIndicesMS`
- 高架十字迷宫（Elevated Plus Maze, EPM）任务相关字段：
- `openArmFrameMS`与`openArmIndicesMS`
- `closedArmFrameMS`与`closedArmIndicesMS`

此外，独立文件`headDip.mat`提供了所有小鼠在EPM开放臂边缘探出头行为的相关数据：`headDipFrameMS`与`headDipIndicesMS`。

所有带`*FrameMS`后缀的文件均存储各行为事件的起始与终止时间点（已与神经数据对齐）：第一列为起始点（In），第二列为终止点（Out）。所有带`*IndicesMS`后缀的文件则存储逻辑值0或1，用于标记神经数据的每一帧是否正处于对应行为发生时段。
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`Tracking.mat`为结构体文件，包含以下核心字段：
针对所有神经数据帧，分别适用于EPM、大鼠（RAT）与玩具大鼠（TOY RAT）场景：
`mouse_positionMS`：记录小鼠双耳连线中点的xy平面坐标；
`mouseAngleMS`：以弧度为单位，记录小鼠头部朝向角度；
`mouseVelMS`：以像素/帧为单位，记录小鼠逐帧的运动速度。

仅针对大鼠与玩具大鼠场景，在各神经数据帧下：
`rat_positionMS`：记录大鼠双耳连线中点的xy平面坐标；
`angleDiffMouseHeadDirRatMS`：以弧度为单位，记录小鼠头部朝向与大鼠位置之间的角度差；
`ratVelMS`：以像素/帧为单位，记录大鼠逐帧的运动速度；
`distanceMouseRatMS`或`distanceMouseToyRatMS`：分别记录小鼠与大鼠、小鼠与玩具大鼠之间的像素距离。