Table 1.
Electrical resistivity (TEER) of brain surface microvessels. All TEER values are means ± SEM, except for the one marked by an asterisk (*), which is the mean ± SD.
| Species/Area | Vessel Type | Diameter (µm) |
TEER (Ω·cm2) |
Current (nA) |
Frequency (Hz) |
Reference |
|---|---|---|---|---|---|---|
| Frog (Rana temporaria)/ Pia mater |
small venules | N.D. | 1870 ± 639 * | 100–500 | 2.5 | [3] |
| small venules | 18–47 | ~2000 | 1000 | [35] | ||
| postcapillary venules |
26–74 | 2240 ± 90 | 100–1000 | 2 | [36] | |
| Rat (Rattus norvegicus)/ Pia mater |
arterial mv. | 10–60 | 1490 ± 170 | 50–100 | 2.5 | [37] |
| venous mv. | 918 ± 127 | |||||
| pial mv. | 25–50 | 1488 ± 213 | [38] | |||
| arterial mv. | 2050 ± 316 | |||||
| venous mv. | 798 ± 159 |