ANSWERS RATED A+
✔✔Atonic seizure (drop attack) - ✔✔generalized seizure characterized by sudden loss
of muscle tone and strength; may cause the head to drop suddenly, objects to fall from
the hands, or the legs to lose strength, with falling and potential injury
✔✔Tonic seizure - ✔✔Muscle stiffness, rigidity
✔✔photomyogenic response - ✔✔-normal physiological response to photic light
-frontal leads
-only seen with eyes closed
✔✔Photoparoxysmal response - ✔✔-abnormal response to photic
-spikes, polyspikes, or spike/waves
-mostly seen in FQ >10hz
✔✔HV contraindications - ✔✔recent subarachnoid hemorrhage, recent stroke, sickle
cell disease, intracranial hemorrhage, old age, heart and/or breathing problems
✔✔photic contraindications - ✔✔subarachnoid hemorrhage, recent eye surgery
✔✔tonic (tonic/clonic sz) - ✔✔muscle artifact, generalized voltage suppression
-stiffening/contracting of muscles
✔✔clonic (tonic/clonic sz) - ✔✔rhythmic twitching or jerking of muscles
-spike and slow wave
✔✔Posterior Slow Waves of Youth - ✔✔-8-14 years old
-accentuated by HV
-high voltage theta/delta
-occipital regions
✔✔SREDA (subclinical rhythmic electrographic discharges in adults) - ✔✔-suddenly in
resting EEG
-periodic sharp activity that progresses into a monorhythmic theta pattern
-seen in mostly normal adults over 50
✔✔By age 1, what should the background rhythm be? - ✔✔5-6Hz
✔✔what pattern is seen after cardiac arrest? - ✔✔alpha coma
✔✔EEG obtained during sleep are most important in what type of seizures? -
✔✔complex partial seizures
, ✔✔Sleep stages in tern newborn are characterized by: - ✔✔onset active sleep
✔✔What montage are 14&6 positive spikes are best seen in? - ✔✔contralateral ear
reference
✔✔At what age does posterior background rhythm become reactive to eye closure? -
✔✔3-6 months
✔✔Sleep onset REM = - ✔✔narcolepsy
✔✔POSTS - ✔✔-stage 1 sleep, sometimes in stage 2
-4-5hz
-occipital channels
✔✔MU vs Alpha - ✔✔-Mu occurs in c3/c4
-alpha occurs in o1/o2
-mu and alpha have the same fq 8-13hz
-mu does not go away when eyes are open, unlike alpha
✔✔What different scenarios do you see normal EEG activity ? - ✔✔-multiple sclerosis
-cerebellar abscess
-following an absence seizure
-early Alzheimer's
-two days after a TIA
-down syndrome
-inter-ictal of febrile seizures
✔✔What scenarios would you see PLEDS in EEG? - ✔✔-cerebral embolus
-acute cerebral infarction
-herpes simplex encephalopathy*
-ischemic stroke*
✔✔Asperger's syndrome - ✔✔Mild form of autism; may have concomitant learning
disabilities and/or poor motor skills.
✔✔what scenarios would you see bi-pleds? (both hemispheres but independently) -
✔✔-anoxic encephalopathy
-hypoxia
✔✔Proprioception - ✔✔-temporal lobe
-our sense of body position
✔✔Frequencies of EEG - ✔✔Delta - 0-4hz