There are seventeen civil townships in Logan County. 1  Of these, none are urban townships, and no municipalities have been formed from former townships: 2  Bloomfield Township. 3  Bokes Creek Township. 4  Harrison Township. 5  Jefferson Township. 6  Lake Township.
Insufficient sleep is often cited as a trigger for acute migraine attacks. Excessive sleep is a frequently reported trigger as well. Jet lag and changes in your work schedule can also be linked to the onset of migraine. Insomnia is the most common sleep disorder associated with chronic migraine.
Researchers have identified possible causes, but they donât have a definitive explanation. Potential theories include: An underlying central nervous disorder may set off a migraine episode when triggered. Irregularities in the brainâs blood vessel system, or vascular system, may cause migraines. A genetic predisposition may cause migraines Abnormalities of brain chemicals and nerve pathways may cause migraine episodes.