Indian J Med Microbiol Close
 

Figure 5: a) occipital spikes seen in bipolar derivation as downward deflection in T5-O1 and T6-O2 because of ‘end of chain phenomenon’. b) same spikes in the common average reference derivation shows upright deflection correctly reflecting the maximal negativity at the occipital electrodes.

Figure 5: a) occipital spikes seen in bipolar derivation as downward deflection in T5-O1 and T6-O2 because of ‘end of chain phenomenon’. b) same spikes in the common average reference derivation shows upright deflection correctly reflecting the maximal negativity at the occipital electrodes.