Term
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Definition
| the siultaenaous electrcal acitvity of a population ofn eurons. Their indiidual APs are summative, if they arei nhbiitory they wil lsubractfrom the eeg. |
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Term
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Definition
| when a nueron depolarizes negativity pores out of the cell, and ther is negativeity outside in relation to another part of the nerve, setting up a current. Each cell has affernets coming on at differnet points making the current go in different directions as well. |
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Term
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Definition
| because each axon is doing its own thing woudl expess its summation to be a bunch of noisy,fast litle waves. If sees lwo , smal lwaves ,need to bec oncerned about pathology |
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Term
| thigns to look for in EEg |
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Definition
| shoudl be desynchronzied. unless alseep which wil glive rise to slow rhytmic activity. wold espcet a typical eeg to be symemtric across left and right, assymetry could be sign of pathology. Lookign for abnormal spikes, spikes and waves ,ro epileptic discharges |
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Definition
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Term
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Definition
| 8-13 waves/sec relaxed but alert |
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Definition
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Definition
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Term
| devleopmetn of brain and comparison to eeg |
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Definition
| when first born, you see delta waves int e hbeginning, eventually devleop alpha and then by 12 you loko lie kan adult. Frotn of the brain tends tom ature more rapidlyt han the back |
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Term
| SLDIE 14: sezire lecture : patholgoical E |
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Definition
| slow delta waves- large, occurs all oer, icnredible synchrony in all parts o the brain. THi si apathology |
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Term
| slide 15: EEG interpretation |
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Definition
| patient with theta waves. pathetic buth as consioucness. WOul be expected to zone out at several points. Left and right are firing together . Front and middle synchrony. |
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Term
| slide 16 eeg interpreataiton |
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Definition
| completley normal .TYPical alpha activity, without parallael waeorm rto elft or front to back |
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Term
| slide 19 picturs :the differnet ytpes of aves |
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Definition
| spike (<70 m sec. ) sharp wave (150-200 msec). Spike and wave-pattern with 3/sec. can have irregular pattern of spikes and wves as well |
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Term
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Definition
| CLINICAL manfiestations of abnormal brian ctivity. doesnt count if can se eit electrically, but not physically manifested. We treate seizures not eegs. Electrical disturbance occurs over and oer buto nl ysmal lpart of iti s manifestedas the seizure |
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Term
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Definition
| name of the disroder characterized y chronic seizures. seizures hemselvs can be epileptic or consequent to otehr causes. |
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Term
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Definition
| seizure that stays there. |
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Term
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Definition
| reproducible activities relax and then rigid repeatedly |
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Term
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Definition
| grnmal seizure. start iwth tonic then convert to clonic. start in the hand and can spread ot the reast of brain to get generalized seizure. |
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Term
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Definition
| can be localized to sensory or mtoor strip of the cortex- seizure in one palce, one modality and patient is cosncious and ablet o tell you about it later. |
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Term
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Definition
| a simple seizure can spread , and we lose cosnciousnes when seizure spreadst o both sidesof hte brain or deep central nuceil. |
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Term
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Definition
| starsti n one place (epileptic focus), one focus one lcoation. Many falvors: simple motor (contralateral deficits), simple sensory in postetnral gyrus, temporal lobe giving psychic symtpoms. Even get autonomic symtposm (sweating shivering dilation of hte pupils and rapid heart rate. Consciousnes is usually nto impaired |
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Term
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Definition
| simple parital onset evolvoing to loss of consioucness (may even be s emiconscious, look awake) . can alaso have imparimetn of consiousness at osnet. |
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Term
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Definition
| whoel body is involved and cosniousness is lost. |
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Term
| simple partial ictal phase |
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Definition
clincial signs depend on affected area. if motor- clonic jerkign of oen extremity . sensoy: bad tase/odor, pastehsias. Psychic- bnormal perception
EEG- lcoalzied changes with multi spike discharge |
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Term
| simple partial postictal phase |
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Definition
| preserved responsiveness, EEG- no residual abnormalities |
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Term
| frontal lobe:dosrsalateral convesity seizure |
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Definition
contralateral tonic/clonic activity (primary motor cortex)- of the hadn/limb or whoel body can be activated because the whoel motor s trip.
SMA- can get weird postures i.e. fencing posture. |
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Term
| orbitofrotnal and cingulate seizure |
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Definition
| elaborate motor atuomatims- odd behaviors(may be misdiagnosed as psychogenic episodes). |
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Term
| general clnical manifestaitons of partial sezirues |
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Definition
| brief, may ocrusm ultipel times a day with no postical deficits. Nocturnal exacerbation common. Elaborate motor automastisms without lsos of consicousnes si comon |
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Term
| spimple partial with secondary generaliation |
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Definition
| local osnet with spread to oth hemispheres. - eventually leads to genralized clonic movemetns of both sides. |
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Term
| parietal lobe symptoms partial seizure |
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Definition
| different s ensatiosn (numbness tinglign ,burning). If in dominant hemisphere can get aphasia. if in nondmoniatn hemipshere can get hemineglect. Evye deviation and head movement. |
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Term
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Definition
| primary visual cortex- abnormalities in vision (sparkels ,flashes etc.). ecodnary visual cortex- formed visual hallucinations. Cana bep rescipiated by changes in lighting, associated with migraines often. |
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Term
| medial temproal lboe partial seizure |
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Definition
| autonomic experiences. : reisign epigastirum = nausea deja vu, panic , atuoomic phenoma (tachy, lpupillary dilation, etc.). Automatisms, and orofacial mvoements. |
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Term
| lateral temproal seizures |
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Definition
| auditory hallucinationss and hearign problems. or trobuel with langauge. |
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Term
| temporal loe sezireus general s tatements |
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Definition
| priamry symptoms as wel las alterign consiocuness. primary compelx sures start here. |
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Term
| waht tyep fo seizrues are associated withs clerosis |
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Definition
| hippocampal medial temproa lloe sizure. |
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Term
| complexs parital ictal phase location and clinical signs |
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Definition
| local disharge is in hippocampsu/temporal lboe loss of consoiucnes is preceded by aura (a simple partial seizure) or arning sign. Lots of automatisms, behavrioal arrests |
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Term
| partial complex postictal phase |
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Definition
| confusino adn gradual recovery, amnesia. No residual bnormaliteis |
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Term
| absence seizures: type of seizures and clincial signs |
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Definition
generalized seizure Breif loss of consioucsness, no aura!
motor manfiestations: eye blinking. slow headm ovements withotu automatisms.
EEG: 3 spike-wave sec
postictal phase: clinically normal. EEg noresidualabnormaliteis |
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Term
| difference between absence seizure and copmlex partia lseizures |
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Definition
absence: schoo lage children NO aura, NO automastisms EEG: 3/sec spike/wave. NO postictal symtpoms.
Complx partial :aura , autoamtisms, EEG: Normal.
Postictally have amensia |
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Term
| grand mal seizure clinical signs |
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Definition
tonic-clonic seizure . LOC without aura, tonic phase (10-30 secdons) then clonci phase.
Tonic phase- flexion then follwoed by extension. Eyes , roleldu pwards, eyelids open, arms abducted. Body is arhced- first neck then back.
clonic phase - contracitons and relaxaions. Tongeu often bitten, loss of urine (sphincteric relaxxaton). |
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Term
| granmal seizure eeg sldie 47 |
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Definition
| spking like cray all together in ictal phase. postictally- neurosn are tired so we get synchronous dleta wvaes. |
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Term
| grand mal seizure clincially psot ictal |
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Definition
| patietn rmains uncosnocus for variable periods of time and requries sleep. |
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Term
| when are seizures most apaprent |
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Definition
| during sleep, particualrly tonic-clonci seizreus .during non-rem period neruosn are more excited and thsue have lwoer threshodl of activation |
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Term
| ictal phase vs. psychogenic seizure |
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Definition
libm extension during tonic phase , open eyes, symemtrical, loss of urine.
Lasts less than fivem inutes.
postictal phase deep inacitivyt slep for several hours
psychogenic seizure: closed eyes, asymmetrical movements, NO loss of urine NO spasm or respiratory msucles. Lasts longer htan 10 minutes, imemdiate gain of consiuness. |
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