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Hypothesis:
Stimulation of the SPG at high frequencies (50-200Hz) is believed to cause a physiological parasympathetic block which decreases VMCA oxyHb concentration and cephalic vessel diameter.
Stimulation of the SPG at low frequencies (1-60 Hz)is believed to cause a physiological parasympathetic upregulation which increases VMCA, oxyHb concentration and cephalic vessel diameter.
Efferent
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Inclusion Criteria:
•Subject is currently enrolled in Pathway CH-1 (CIP-001)
Exclusion Criteria:
•Subject is NOT currently enrolled in Pathway CH-1(CIP-001)
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Community Sample
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| ID | Term |
|---|---|
| D003027 | Cluster Headache |
| ID | Term |
|---|---|
| D051303 | Trigeminal Autonomic Cephalalgias |
| D051270 | Headache Disorders, Primary |
| D020773 | Headache Disorders |
| D001927 | Brain Diseases |
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| D002493 | Central Nervous System Diseases |
| D009422 | Nervous System Diseases |