Constante tempo membrana τ

The membrane time constant (τ) calculator determines how long a cell membrane takes to reach ~63% of its electrical response to a stimulus. The formula τ = R_m × C_m combines membrane resistance (R_m) and membrane capacitance (C_m). This is essential for studying neuronal action potentials, cardiac electrophysiology, and cellular signal dynamics.

This constant governs how quickly a membrane charges or discharges. In biomedical applications, τ guides electrical stimulation protocols for nerve therapies and neural interfaces. In biomedical engineering, it informs electrode and sensor design. R_m typically ranges from 10^7 to 10^8 ohms, while C_m varies between 1, 20 µF/cm² depending on cell type.

For accurate results, measure R_m and C_m experimentally. Consider biological variables like ion channel activity or temperature fluctuations, which can alter real-world parameters. τ also serves as a diagnostic tool in toxin/drug research to detect membrane integrity changes.

τ is dynamic in excitable cells like neurons. Variations in τ may signal ionic channel dysfunction or pathological conditions. Always contextualize results within the specific biological or experimental framework to ensure meaningful interpretation.