19 - Headache + Migrane Flashcards
Difference between a primary and secondary headache
Primary - Diagnosis without physical signs
Secondary - Diagnosis with physical signs
Percentage of headaches that are tension-type
80%
What do tension type headaches feel like
Band like, bilateral, tightness, pressure, dull ache
Radiate to neck and shoulders - mild to moderate
How do you treat a tension type headache
Analgesics
Percentage headaches that are cluster headaches
0.2 - 0.3%
Features of a cluster headache
Severe pain on one side of the head
Triggered by sleep
More common in men
Treatment of cluster headache
High flow oxygen - vasoconstriction
Highly caffinated drinks
Percent that are migraines
15%
Features of migraine
need 2/3
Light bothers you, headache limits ability to work, feel nauseated/sick
What do you inherit in genetics of migraine
Inherit over responsive brain
Heightened senses to smell, light, sounds and touch
Migraine triggers
Hormones
Lack of food
Lack of sleep
Dehydration
% migraines without aura
70-80%
% migraines with aura
20-30%
When does the migraine start
Usually 48hours before the headache starts
What happens to 5HT levels during a migraine
They increase
What happens if you deplete serotonin
It can trigger a migraine
Serotonin infusions - can relieve a migraine
Acute drug class for migraine
Triptans
Prophylactic drug for migraine
Methysergide
5 stages of Migraine
Premonitory Aura Headache Resolution Recovery
Premonitory Symptoms
Food craving
Neck pain
Fluid retention
What is an aura
Visual and/or sensory and/or speech and language problems
How long does and aura last
20/30 mins - 1hour
What causes an aura
Cortical Spreading Depression
Features of headache phase
Poor concentration
malaise
lethargy
heightened sense of smell
What pathway does headache go through
Trigeminovascular pathways
What happens in headache pathway
Inflammatory neuropeptides such as CGRP are released
These activate the nerve pathway
Pain signals are sent to the trigeminal ganglion
Trigeminal nerve transmits pain impulses to trigeminal nucleus caudalis
Pain impulses to thalamus –> Cerebral Cortex
What mediates throbbing pain
Peripheral sensitisation
Role of CGRP
Vasodilator
Levels RISE in migraines
MoA of triptans
5HT1D/B agonists
Examples of triptans
Zolmatriptan
Naratriptan
Eletriptan
CGRP monoclonal antibodies
Used for prevention
Fremanezumab