Epilepsy Flashcards
Why are seizures caused in epilepsy?
Either a disrupted signal or too much signal So increased excitation Decreased inhibition Loss of homeostatic control Spread of neuronal hyperactivity
Define epilepsy
Disturbance in the electrical signalling of the brain
There are many different types
Its tendency to have seizures that start in the brain
What are fits that are associated with fever and in which population do they occur?
Febrile convulsions
Children
What are the two main types of epilepsy?
Idiopathic
Symptomatic
What are the two main types of seizure?
Generalised
Focal
Explain what a focal seizure is
Occurs in one part of the brain but it depends where in the brain they happen
Simple focal seizure the person is usually conscious, usually knows something is wrong, usually remember afterward
They can be warnings to develop into another type of seizure
What are the symptoms of parietal lobe focal seizures?
Burning sensation
Tingling
Thinking that a limb is bigger than it is
What are the symptoms of temporal lobe focal seizures?
Abnormal taste or smell
Déjà vu/ jamais vu
Fear and joy
Rising feeling in the stomach
What are the symptoms of occipital lobe focal seizures?
Hallucinations
Disturbed vision
Loss of vision
Flashing lights
What are the symptoms of frontal lobe focal seizures?
Wave
Abnormal movements
Twitching
What are complex focal seizures?
Affect a bigger part of one hemisphere Consciousness may be affected May be confused May involve wandering around or behave strangely May not understand you
What are the symptoms of temporal lobe complex seizures?
Pick up objects for no reason Chewing lip or smacking movements Words that don't make any sense Wander around confused Last for 2 to 3 minutes May take up to 10 minutes to recover
What are the symptoms of frontal lobe complex seizures?
Cry or scream
Strange postures
15 to 30 seconds duration
Recover quickly
Can a focal seizure turn into a generalised seizure and what happens?
Yes
Loss of consciousness
What is a generalised seizure?
Affects both sides of the brain
Can occur without warning
Unconscious
Do not remember what happened