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# Table 2 Quantities used to describe morphological behaviors.

From: Automated characterization of cell shape changes during amoeboid motility by skeletonization

Classification | Name | Description |
---|---|---|

Individual pseudopods
| ||

General | Lifetime | The length of time period when the pseudopod has protrusion or retraction activity |

Number of detected activities | The total number of detected activities during the lifetime | |

Net speed | The net displacement of local membrane during the lifetime divided by the time length | |

State dynamics | Protrusion/retraction ratio | Ratio of protrusion/retraction activities out of all detected activities |

Protrusion/retraction speed | Total length of protruded/retracted displacement divided by the total length of protrusion/retraction time | |

Protrusion/retraction persistence | The longest running time of consistent protrusions/retractions divided by the lifetime | |

State persistence | The longest running time of consistent state (either protrusion or retraction) divided by the lifetime | |

Angle dynamics | Starting angle | The angle at which the first activity of the pseudopod is detected |

Mean angle | The angle averaged over all activities in the pseudopod | |

Linear angle changing rate | The slope of the line that fits best to the activity angle changes | |

De-trended angle variance | The variance of activity angles after removal of the linear changing rate | |

Splitting behavior | Origin | The pseudopod is generated newly or by splitting from existing ones |

Number of splits | How many splits are generated from the pseudopod during its lifetime | |

Cell Level
| ||

Group behavior | Average number of pseudopods | The average number of active pseudopods coexisting on the cell membrane at any given time point |

Ratio of pseudopods from splitting | Number of pseudopods generated from splitting divided by the total number of pseudopods | |

Average splitting rate | Total number of splits occurred divided by the time length of the period of movement | |

Averaged behavior | Average protrusion/retraction persistence | Computed by averaging the corresponding quantities for individual pseudopods over all pseudopods in the cell. |

Average state persistence | ||

Average protrusion/retraction speed | ||

Average net speed |