| PISCES | percutaneously inserted spinal cord electrical stimulation |
|---|---|
| PSMA | proximal spinal muscular atrophy |
| PSP | pancreatic spasmolytic peptide; paralytic shellfish poisoning; parathyroid secretory protein; period... |
| SAPF | simultaneous anterior and posterior [spinal] fusion |
| SBMA | spinal bulbar muscular atrophy |
| SSR | spinal stretch reflex |
|---|---|
| STN | spinal trigeminal nucleus |
| SBS | spino-bulbo-spinal |