Longitudinal
bipolar (LB) or
Double banana
Electrode setup Pros and Cons Epilepsy That Best
Detects
Standard LB - compare anterior-posterior (AP)
activities: FP1 – F3
-Fair for focal small amplitude
in AP progression (discharges
may be buried in higher
amplitude activities when used
with long inter-electrode
distances reference but may
miss widespread generators
due to cancellation)
- End-of-chain phenomenon in
Fp and O (frontal and occipital
lobes may not be well-
represented).
Mesial Temporal Lobe
Epilepsy (MTLE) activity
comes from deep
structure -> smaller spike
and gradually builds up
from rhythmic theta
(TIRDA)
Double distance -modified larger interelectrode distance
bipolar : FP1 – C3
Better detect subtle small
amplitude activities but trade-
off the precision of localization
Electrocerebral inactivity
Anterior temporal
modification
Add FT9/FT10 or T1/T2 The use of T1/T2 increases the
specificity of "ictal" temporal
lobe seizures but does not
improve the specificity for
"interictal" states. The authors
anticipated that FT9/FT10 alone
MTLE
