The EEG in epilepsy - Vanderbilt University Medical Center

70 Pages·2013·3.43 MB·English

The EEG in focal
epilepsy
Bassel Abou-Khalil, M.D.
Vanderbilt University Medical Center
I have no financial
relationships to disclose
that are relative to the
content of my
presentation
Learning Objectives
to identify focal epileptiform
abnormalities
to recognize the clinical significance of
epileptiform discharges in the diagnosis
of epileptic syndromes
to localize interictal epileptiform and
ictal discharges
Self assessment
questions
Q1- The difference between
epileptiform sharp waves and
nonepileptiform sharp transients
is
A. Epileptiform transients are more likely to be
symmetrical and monophasic
B. Epileptiform transients are more likely to be
asymmetrical and polyphasic
C. Epileptiform discharges are less likely to
have an aftergoing slow wave
D. Epileptiform discharges have a larger first
segment than second segment
Q2- The following are
most specific for
epilepsy
Occipital sharp waves
A.
Parietal and central sharp waves
B.
Anterior temporal and frontal sharp
C.
waves
Generalized sharp waves
D.

Q3- What is not true for
the EEG above
Findings may be seen in the absence
A.
of epilepsy
Is expected to remit at puberty
B.
Seizures are likely to be hemifacial
C.
sensorimotor
Seizures likely manifest with
D.
oroalimentary automatisms
Fp1-Av
Fp2-Av
F3-Av
F4-Av
C3-Av
C4-Av
P3-Av
P4-Av
O1-Av
O2-Av
F7-Av
F8-Av
T1-Av
T2-Av
T7-Av
T8-Av
P7-Av
P8-Av
Fz-Av
Cz-Av
Pz-Av

ECG
Q4- What is not true for
the EEG above
Seizures originate from both temporal
A.
regions
Findings could be seen in parietal and
B.
insular lobe epilepsy
Seizures are more difficult to lateralize
C.
than for patients with unilateral
discharges
Waking and REM recordings may help
D.
resolve lateralization