Seizures and Epilepsy Flashcards
Seizure
Abnormal synchronous firing of neurons which can manifest clinically or on EEG
How does seizure move
From epileptiogenic zones to symptomatogenic zones
What is epilepsy
Disoder characterized by an enduring predisposition to generate epileptic seizures
2 unprovoked seizures >24 hours apart
Ictus period
Postictal period
interictal period
During
After
Between
Prodrome vs aura
Prodrome typically comes much longer before the seizure
Aura is more defined to a specific sense
Status epilepticus
Prolonged sezirue lasting longer than 10 minutes (first aid says 30 minutes)
EEG…how it works?
Generated by cortical cell inhiitory and excitatory postsynaptic potentials
Postsynaptic potentials summate in cortex and extend to surface
Simple partial seizrues
Consciousness intact (b/c simple)
Particular part of the brain (because partial)
Complex partial seizures
Impaired consciousness
Partial seziures
Also focal
Most commonly in medial temporal lobe
Often preceded by aura and can secondarily generalize
Absence seizure
Petit mal
Sudden onset
Stare into space
No aura or postictal state
3Hz spike and wave pattern
JME
Juvenile myoclonic epilepsy
Around puberty
Precipitated by sleep deprivation
Photosensitive
2 types of non epileptic
Psychogenic and physilogic
Myoclonic
Tonic-clonic
Tonic
Atonic seizures
Quick, repetitive
(Grand mal) - alternating stiffening and movement
Stiffening
Drop seizures (mistaken for fainting)
Olfactory auras involve
mEsial temporal structures and amygdala
