| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| membrane that protects the brain | 1.76 | 0.7 | 5552 | 69 |
| membrane that protects spinal cord and brain | 1.92 | 1 | 2777 | 74 |
| what membrane protects the brain | 0.83 | 0.3 | 6809 | 97 |
| a membrane that surrounds the brain | 0.35 | 0.6 | 6244 | 89 |
| membrane covering the brain | 1.06 | 0.3 | 1848 | 60 |
| what is the membrane around the brain | 1.92 | 0.6 | 1157 | 66 |
| innermost membrane that covers brain | 1.75 | 0.4 | 3495 | 11 |
| protective membrane layers of the brain | 0.67 | 0.8 | 9017 | 69 |
| membranes that protect brain and spinal cord | 1.73 | 0.3 | 8161 | 84 |
| membrane surrounding the brain | 1.25 | 0.3 | 4934 | 57 |
| membrane that covers brain and spinal cord | 1.03 | 1 | 8461 | 89 |
| innermost membrane covering the brain | 1.66 | 0.4 | 2005 | 26 |
| middle membrane covering the brain | 1.42 | 0.6 | 8354 | 36 |
| brain is covered by which membrane | 1.98 | 0.3 | 2122 | 50 |
