Subregional distribution of mesohabenular TH neuronsa
| Rostral linear | Interfascicular | Paranigral | Parabrachial pigmented | Parainterfascicular | Rostral VTA | |
|---|---|---|---|---|---|---|
| Rat 1 | 16.13% | 29.03% | 37.1% | 9.68% | 8.06% | 0% |
| (n = 10) | (n = 18)+ | (n = 23) | (n = 6)++ | (n = 5) | (n = 0) | |
| Rat 2 | 30.65% | 45.16% | 11.29% | 12.9% | 0% | 0% |
| (n = 19) | (n = 28)++ | (n = 7) | (n = 8) | (n = 0) | (n = 0) | |
| Rat 3 | 11.94% | 20.9% | 31.34% | 29.85% | 4.48% | 1.49% |
| (n = 8) | (n = 14) | (n = 21)+ | (n = 20) | (n = 3) | (n = 1) | |
| Rat 4 | 7.14% | 55.95% | 30.95% | 3.57% | 2.38% | 0% |
| (n = 6) | (n = 47)++ | (n = 26)+ | (n = 3)+ | (n = 2)+ | (n = 0) |
↵aPercent of retrogradely labeled neurons expressing TH protein within distinct VTA subnuclei. +, 1 VMAT2-expressing mesohabenular TH neuron; ++, 2 VMAT2-expressing mesohabenular TH neurons.