click below
click below
Normal Size Small Size show me how
ABNORMAL WAVEFORMS
RECOGNITION OF ABNORMAL WAVEFORMS
Question | Answer |
---|---|
ABNORMAL EEG CONSISTS OF? | BACKGROUND SLOWING SLOW WAVES PAROXYSMAL ACTIVITY VARIETIES OF SPECIFIC PATTERNS |
ACTIVITY OF ABNORMAL EEG MAY BE? | FOCAL BILATERALLY DIFFUSE UNILATERAL OR LATERALIZED |
BACKGROUND SLOWING AND SLOW WAVES SUGGESTS? | CEREBRAL DYSFUNCTION |
PAROXYSMAL ACTIVITY SUGGESTS? | UNDERLYING SEIZURE TENDENCY |
BACKGROUND SLOWER THAN 8 HZ DURING FULL AWAKE STATE IS ABNORMAL AT ANY AGE EXCEPT FOR? | CHILDREN UNDER THE AFE OF 3 YEARS OLD |
AMPLITUDE ASYMMETRY BETWEEN HOMOLOGOUS REGIONS COULD BE DUE TO UNEQUAL INTERELECTRODE DISTANCE BETWEEN THE PAIRS OF ELECTRODES. YOU CAN CONFIRM THIS IS THE ISSUE IF ASYMMETRY ONLY APPEARS? | IN BIPOLAR MONTAGE AND NOT THE OTHERS |
WHAT BACKGROUND ACTIVITY COULD BE CAUSED BY A SUBDURAL HEMATOMA DUE TO THE LONGER DISTANCE TO THE ELCTRODE FROM THE CORTEX BY BY THE DEPRESSED CORTEX AND INCREASED IMPEDANCE DUE TO FLUID COLLECTION | DEPRESSED |
FOCAL ACCENTUATION OF ALPHA AND BETA ACTIVITIES IS A COMMON FINDING WITH? | SKULL DEFECTS |
WHAT IS A COMMON FINDING SECONDARY TO SEDATICE HYPNOTIC OR ANXIOLYTIC DRUG EFFECT? MOST COMMON MEDS ARE BENZOS OR BARBS. | DIFFUSE INCREASE OF BETA |
TYPICALLY MORE PROMINENT IN SLEEP CHARACTERIZED BY ABYNDANT SLEEP SPINDLES WITH A PAUCITY OF VERTEX SHARP WAVES OR K COMPLEXES? | MEDICATION EFFECT |
PROMINENT AND DIFFUSE BETA IN THE FORM OF SLEEP SPINDLES SEEN IN SEMI COMATOSE OR COMATOSE PATIENTS AFTER OVERDOSE OR THERAPEUTICALLY INDUCED BY HYPNOTIC OR ANZIOLYTIC DRUGS? | SPINDLE COMA |
PROMINENT DIFFUSE OR WHAT ACTIVITY MAY BE SEEN IN PATIENTS WITH GROSSLY ANOMALOUS BRAIN SUCH AS AGYRIA OR CORTICAL DYSPLASIA? | LOCALIZED BETA |
FOCAL ADA IN PATIENTS WITH WHAT WAS FIRST DISCOVERED BY GARY WALTER? | BRAIN TUMORS |
FOCAL ADA IS A RELIABLE INDICATOR OF A FOCAL SUPRATENTORIAL LESION OF DYSFUNCTION MAINLY INVOLVING? | WHITE MATTER |
BILATERALLY DIFFUSE ADA IS A SIGN OF DIFFUSEDISTURBANCE OF WHAT BUT IS ETIOLOGICALLY NONSPECIFIC | CEREBRAL ACTIVITY |
TOXIC,METABOLIC,INFECTIOUS,CEREBRAL ISCHEMIA,OR DEGENERATIVE/DEMYELINATING DISORDERS? | DIFFUSE ADA MAY BE SEEN IN ANY DIFFUSE CEREBRAL DYSFUNCTION |
WHAT CONSISTS OF SERIAL DELTA WAVES THAT APPEAR INTERMITTENLY WITH RELATIVELY CONSISTENT WAVEFORM AND FREQUENCY? | IRDA OR RDA |
IRDA APPEARS MOST OFTEN BILATERALLY, IF IT APPEARS WHAT MAY BE CONSIDERED AS POSSIBLE EPILEPTIFORM? | FOCALLY |
FIRDA | ADULTS |
ORIDA | CHILDREN (COMMON IN CHILDREN WITH AVSENCE SEIZURES) |
MUST BE DIFFERENTIATED FROM EYE MOVEMENT ARTIFACT AND GLOSSOKINETIC POTENTIAL.IT CAN BE DISTINGUISHED FROM EYE MOVEMENT BY ITS GREATER POSTERIOR SPREAD AS COMPARED TO THE SLOW ACTIVITY PRODUCED BY EYE BLINKS? | FIRDA |
TEMPORAL INTERMITTENT RHYTHMIC DELTA OFTEN ASSOCIATED WITH TEMPORAL LOBE EPILEPSY | TIRDA |
MORPHOLOGY OF A SPIKE CAN BE? | MONOPHASIC DIPHASIC TRIPHASIC POLYPHASIC |
PAROXYSMAL ACTIVITY | D/C OF ABRUPT ONSET AND SUDDEN TERMINATION THAT ARE CLEARLY DISTINGUISHABLE FROM THE ONGOING BACKGROUND ACTIVITY. MAY APPEAR IN SINGLE WAVEFORMS, SERIAL ARRHYTHMIC OR SERIAL RHYTHMIC WAVEFORMS (BURTS) GENERALLY IMPLIES POTENTIAL SEIZURE TENDENCY |
DEFINED AS A TRANSIENT WITH A POINTED PEAK HAVING A DURATION OF 20-70 MS AND A SHARP WAVE IS DEFINED AS HAVING A MORE BLUNTED PEAK WITH DURATION OF 70-200 MS? | SPIKE |
DEFINED AS MULTIPLE SPIKE COMPLEX. A SPIKE FOLLOWED BY WAVE IS A SPIKE AND WAVE COMPLEX? | POLYSPIKE |
IN EPILEPTIC CONDITIONS CORTICAL NEURONS CHANGE DRAMATICALLY AS THE MEMBRANE POTENTIAL CHANGES FROM A RESTING STATE AT NEGATIVE 70-80 MV TO SUSTAINED DEPOLARIZATION AT POSITIVE 20-30 MV PRODUCING A GROUP OF ACTION POTENTIALS CALLED? | PAROXYSMAL DEPOLARIZATION SHIFT (PDS) |
PDS ORIGINATING FROM WIDE CORTICAL REGIONS IS ASSOCIATED WITH? | SPIKE DISCHARGES |
IN WHAT IS A SPIKE IS THE RESULT OFEPSP AND A WAVE IS FROM IPSP | SPIKE WAVE COMPLEXES |
3 HZ SPIKE WAVE BURTS IN WHAT ARE VIEWED AS ALTERNATING EXCITATORY AND INHIBITORY RESPONSES. POLYSPIKE DISCHARGES REPRESENT SUSTAINED EXCITATION? | ABSENCE SEIZURES |
WHAT IMPLIES THE DEEPEST LEVEL OF A COMA STATE BEFORE BRAIN DEATH? | BURST SUPPRESSION |
ABUNDANT, DIFFUSE ALPHA ACTIVITY THAT IS NONREACTVE TO EXTERNAL STIMULI. MOST FREQUENTLY SEEN IN PATIENTS WITH SEVERE ANOXIC ENCEPHALOPATHY AND GENERALLY SUGGESTS AN EXTREMELY POOR PROGNOSIS? | ALPHA COMA |
ANALOGOUS TO ALPHA COMA BUT HAS A SLIGHTLY SLOWER FREQUENCY? | THETA COMA |
SPINDLE COMA? | CAN BE SEEN IN COMATOSE PATIENTS AS A SLEEP PATTERN CONSISTING OF SPINDLES, VERTEX,AND OR K COMPLEXES MIXED WITH THETA DELTA SLOW WAVES, BUT THE PATIENT DOES NOT AROUSE TO STIMULI |