| Similarity | Rank | |
|---|---|---|
| serotonin | 0.840 | 59388 |
| dopamine | 0.838 | 48767 |
| glutamate | 0.781 | 85465 |
| nerve_cell | 0.756 | 44534 |
| synapse | 0.751 | 31235 |
| receptor | 0.749 | 11858 |
| ion_channel | 0.739 | 79248 |
| neuron | 0.734 | 8698 |
| the_central_nervous_system | 0.725 | 30904 |
| neuronal | 0.721 | 71428 |
| the_brain | 0.709 | 2459 |
| the_nervous_system | 0.699 | 19946 |
| brain_cell | 0.698 | 47809 |
| astrocyte | 0.693 | 63323 |
| hormone | 0.686 | 11559 |
| cortisol | 0.684 | 61115 |
| cell_membrane | 0.675 | 36083 |
| muscle_cell | 0.675 | 89172 |
| brain_function | 0.667 | 40259 |
| metabolism | 0.662 | 11719 |
| intracellular | 0.661 | 72459 |
| cytokine | 0.658 | 31988 |
| the_hippocampus | 0.655 | 66791 |
| central_nervous_system | 0.654 | 71207 |
| signal_transduction | 0.653 | 87882 |