Headaches can be divided into two major categories, known as primary and secondary headaches. Primary headaches are those that occur for no known cause, and are grouped as either migraine, tension, or cluster headaches. They are said to not be caused by an underlying medical condition, and constitute 90% of all headaches. Secondary headaches are because you have a tumor, bleed, infarction, infection, or other brain injury. Some 12% of all Americans suffer from headaches.
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NEUROSYPHILIS
progressive loss of mental and physical fx
Treponema pallidum, spirochete, invades CNS
four stages, if you will:
1) asymptomatic (painless chancre, condyloma lata, urethral discharge green)
2) meningovascular (perivascular inflam presents as stroke of MCA or basilar branch in young person, these vessels being in the base of the skull, may result in cranial nerve palsies)
3) paretic (20-30 years, progressive: spirochetes invade parenchymal tissue-->inflam kills brain cells-->chronic perivascular and meningeal inflammatory changes-->brain atrophy)
4) tabes dorsalis (present with loss of pain sensation, bladder incontinence, loss of peripheral reflexes, impairment of vibration sense and proprioception, progressive ataxia dt demyelination of posterior column, inflam and fibrosis of dorsal sensory nerve roots-->ataxia, loss of pain and proprioception-->demetia-->vegetative-->death)(Argyl-Robertson pupil does not react to direct light but is consensually reactive and accomodative)

What's MCA?
( part 2, Miller notes: neurosyphilis, JC virus, measles (rubeola), polio, rabies, HIV, slow viruses (prions), and Reye's syndrome for good measureCollapse )

Here's my (new) mnemonic for remembering the cranial nerves:
"On Old Olympic Towering Tops A Feisty Virgin Grows Vines And Hops"

Next week I will be presenting on the nerves and the basics for testing them. I am beginning from a place of total ignorance, so skip or bear with me as I develop my notes. Free free to contribute relevant information, even if you are on my shit list. =-]
( getting nervyCollapse )