There are multiple definitions:
first heart sound(English)
primary somatosensory cortex(English)
- migraine is a cyclic excitatory disorder and that the neural substrates involved include the somatosensory system, starting in the brainstem and spanning subsequently to the S1 before the migraine occurs
- EEG
- Headache, Brain (dys)function, Anatomy
- https://doi.org…194-022-01392-1
first sacral vertebra(English)