B7-053 CBCL Seizures Flashcards
involuntary synchronous stiffening of the limbs
tonic convulsion
involuntary synchronous semi-rhythmic movements of the limbs
clonic convulsion
[…] is often associated with a brief convulsion
syncope
syncope due to convulsion is usually caused by
transient hypotension
[seizure or convulsive syncope]
prolonged standing
convulsive syncope
[seizure or convulsive syncope]
valsalva
convulsive syncope
(straining for bowel movement/urination)
[seizure or convulsive syncope]
in response to pain, blood
convulsive syncope
[seizure or convulsive syncope]
tunnel vision, distant hearing
convulsive syncope
[seizure or convulsive syncope]
focal onset
seizure
[seizure or convulsive syncope]
tongue biting on side
seizure
[seizure or convulsive syncope]
prolonged unconsciousness
seizure
[seizure or convulsive syncope]
postictal confusion
seizure
[seizure or convulsive syncope]
incontinence
seizure
types of focal onset seizures [3]
focal onset with retained awareness
focal onset with impaired awareness
focal onset to bilateral tonic-clonic
broad classifications of seizures based on manifestations [3]
simple motor seizure
complex movement or behavior seizure
auras
types of generalized onset seizures [2]
motor: tonic-clonic (grand mal), myoclonic
nonmotor: absences (petite mal)
[…] seizures do not have auras
generalized
(focal might, but generalized does not)
types of unknown onset seizures [3]
motor
nonmotor
unclassified
intrinsic tendency of the brain to have seizures
epilepsy
[…] or more unprovoked seizures constitutes a diagnosis of epilepsy
two
seizures typically onset […] after ischemic stroke
1 year
about 20% of patients will develop […] following ischemic stroke
epilepsy
focal onset seizures
localized EEG abnormalities
usually acquired
focal epilepsies
if they find the scar causing focal epilepsy it is called
non-cryptogenic
(if they don’t find it, it is called cryptogenic)
the typical cause of focal epilepsies in middle age patients is
tumor
the typical cause of focal epilepsies in elderly patients is
old stroke
temporal lobe focal epilepsy that starts in the hippocampus is called
mesial temporal sclerosis
frontal lobe focal epilepsy that starts in the motor cortex is called
supplementary motor
types of focal epilepsies [4]
temporal lobe
frontal lobe
parietal lobe
occipital lobe
(temporal and frontal are more common)
common visible causes of focal epilepsies [3]
post traumatic scarring
tumor
old stroke
generalized onset seizures
bilateral symmetric EEG abnormalities
often genetic
generalized epilepsy
genetic generalized epilepsies [3]
childhood absence
juvenile absence
juvenile myoclonic epilepsy
causes of generalized epilepsy due to severe brain damage at a young age [2]
infantile spasms
Lennox-Gaustaut syndrome
treatments for patients refractive to epileptic drugs [2]
epilepsy surgery
electrical stimulation of nervous system
drugs that only prevent either focal onset or generalized onset seizures are called
narrow spectrum
drugs that only prevent both focal onset and generalized onset seizures are called
broad spectrum
only narrow spectrum drug for generalized epilepsy
ethosuximide
(other narrow spectrums are for focal)
modifies synaptic release of GABA by binding to SV2A
levtriracetam
inhibit T-type Ca+ channels [2]
ethosuximide
valproic acid
drugs that tend to be efficacious for absence seizures [2]
ethosuximide
valproic acid
(inhibit T-type Ca+ channels)
decrease excitatory neurotransmission by binding to voltage gate Ca++ channels [1]
gabapentin
what type of seizure is associated with abnormal T-type calcium channel activity?
absence
increases the affinity of GABA receptors for GABA, which increases the likelihood of channel opening
benzos
DOC for status epilepticus
benzos
effective for 2-3 weeks due to tolerance to anticonvulsant effects
limited to short term treatment
benzos
bind to binding site on GABA to increase channel open time
barbituates
DOC of tonic-clonic seizures [2]
barbiturates
valproic acid
abrupt withdrawal can precipitate status epilepticus
phenobarbital