README.txt

Title: Processed datasets for lateral pinch force simulations

This folder contains the processed datasets used to generate the figures and tables reported in the associated manuscript:

Sancho-Bru, J.L. et al. Influence of interaction formulation on lateral pinch force estimation using a musculoskeletal hand model. Biomechanics, under review.

---

OVERVIEW

The files in this folder contain processed results derived from the simulation outputs. They are intended to allow direct reproduction of the figures and tables presented in the manuscript without requiring reprocessing of raw simulation data.

In addition to aggregated datasets, this folder also includes interpolated time-series data used for temporal analyses.

Each Excel file corresponds to a specific analysis or result.

---

FILES DESCRIPTION

* F_and_activations_50_runs.xlsx
  Muscle activation patterns obtained from the 50 constrained simulations, together with the corresponding pinch force values. Includes identification of top-performing solutions and best solutions within groups of ten simulations.
  (Figures 1–2)

* contact_loss_summary.xlsx
  Summary of contact loss events in the contact-based simulations, including time of contact loss and validity indicators at different time instants.
  (Results Section 3.2)

* stabilization_summary.xlsx
  Stabilization times of the normal force component, including per-simulation values and aggregated statistics (median, IQR, percentiles) for different models and time windows.
  (Figures 3–4 and Table 1)

* posture_change_summary.xlsx
  Changes in joint angles from simulation start to stabilization, including global and joint-level metrics.
  (Table 2)

* similarity_summary_mu_0p29.xlsx

* similarity_summary_mu_1p0.xlsx
  Differences in force and joint angles between constrained and contact-based simulations for different comparison instants, reported per simulation and as aggregated statistics.
  (Figures 5–7)

* computational_cost_summary.xlsx
  Execution times for optimization and forward-dynamics simulations, including per-simulation values and aggregated statistics.
  (Table 3)

* force_time_series_interpolated.xlsx
  Interpolated time series of the normal force component (Y direction) for constrained and contact-based simulations. Data are resampled onto a common time grid and include contact simulations at t = 0.50 s for both friction conditions (μ = 0.29 and μ = 1.0).
  These data support the temporal analyses of force evolution and stabilization.

* joint_angles_time_series_interpolated.xlsx
  Interpolated time series of joint-angle trajectories for constrained and contact-based simulations. Data are resampled onto a common time grid and include contact simulations at t = 0.50 s for both friction conditions (μ = 0.29 and μ = 1.0).
  These data support the analysis of postural evolution and similarity metrics.

---

DATA FORMAT AND CONVENTIONS

* Each file may contain multiple sheets, typically including:

  * per_simulation: values for individual simulations
  * aggregated: summary statistics (median, IQR, percentiles)

* Time-series files contain:

  * time in the first column
  * subsequent columns corresponding to individual simulations or variables

* SimulationID refers to the index of each simulation (1–50).

* All quantities are expressed in SI units unless otherwise specified:

  * Forces are reported in Newtons (N)
  * Time in seconds (s)
  * Joint angles in degrees (deg)

* Variable names follow the notation used in the manuscript.

---

NOTES

* These datasets correspond to processed results used directly in the manuscript.
* The time-series files correspond to post-processed and interpolated simulation outputs resampled onto a common time grid and do not represent raw OpenSim output files.
* Raw simulation outputs are not included in this folder but are available upon reasonable request.
* Additional details on data processing and analysis can be found in the Methods section of the manuscript.

---
