Table 2 Relevant physical values for BBB stimulation

Trans-endothelial electrical resistance (TEER)

1500–8000 Ω cm²

[59]

Density, brain tissue

1.03 g/cm³

[60]

Conductivity, brain tissue

0.258 S/m

[61]

Volume specific surface area, BBB

150–200 cm²/g tissue

[59]

Total surface area, BBB (in adults)

12–18 m²

[59]

Acoustic attenuation, brain tissue

0.8 dB/cm*MHz

[62]

Safe electric current density, brain tissue

0.06 mA/m²

[63]

Safe electric charge injection capacity

0.054  C/m²

[63]

Thermal conductivity, brain tissue

0.527W/mC

[64]

Thermal attenuation coefficient, brain tissue

35.2/cm

[64]

Diffusivity

1.3 10^–7 m²/s

[64]