manifestation of synchronisation and excessive firing from a population of cortical neurons
1 of 26
Epileptogenesis
sequence of events that converts a normal neuronal network into a hyperexcitable circuit which triggers spontaneous seizures
2 of 26
Status Epilepticus
medical emergencies characterised by 5 or more minutes of either continuous seizure activity or repetitive seizures with no recovery of consciousness/ can be generalised convulsive and non-convulsive
3 of 26
convulsion
major motor manifestation of a seizure (rhythmic jerking of limbs)
4 of 26
Aura
subjective and may be sensory or experiential that represents the start of certain seizures- a "warning"
5 of 26
focal aware seizures- temporal lobe
unusual smell or taste / sudden intense feeling of fear or joy
6 of 26
focal aware seizures - occipital lobe
visual disturbances (coloured or flashing lights ? hallucinations
arising within and rapidly engaging bilaterally distributed networks
11 of 26
Generalised- Atonic
falling limply to the ground
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Generalised- Tonic
going stiff and falling without convulsion
13 of 26
Generalised- Tonic-clonic
Convulsion, going stiff and falling
14 of 26
Generalised- myoclonic
short jerking movements of parts of the body
15 of 26
Generalised- Absence
staring and blinking
16 of 26
Focal seizures
originating within network / limited to one hemisphere- characterized according to one or more features: Aura, Motor, Autonomic: Awareness/responsiveness= altered or retained- may involved bilateral convulsive seizure
17 of 26
Unknown seizure
insufficient evidence to characterse as focal, generalised or both- eg epileptic spasms
18 of 26
EEG- electroencephalogram
captures voltage differences at scale (micro volts), ms resolution
19 of 26
Beta bands
14-20 HZ- cortical
20 of 26
Alpha bands
8-13 Hz- walking-quiet
21 of 26
Theta bands
4-7 Hz- sleep states
22 of 26
Delta bands
1-3 Hz- deep sleep
23 of 26
Applications
diagnostic tool, monitoring tool, research tool
24 of 26
Clinical use
1. detection of epileptic activity, sleep disorders, brain dysfunction
25 of 26
MEG
measure changes in magnetic fields that accompany electrical activity
26 of 26
Other cards in this set
Card 2
Front
sequence of events that converts a normal neuronal network into a hyperexcitable circuit which triggers spontaneous seizures
Back
Epileptogenesis
Card 3
Front
medical emergencies characterised by 5 or more minutes of either continuous seizure activity or repetitive seizures with no recovery of consciousness/ can be generalised convulsive and non-convulsive
Back
Card 4
Front
major motor manifestation of a seizure (rhythmic jerking of limbs)
Back
Card 5
Front
subjective and may be sensory or experiential that represents the start of certain seizures- a "warning"
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