Annals of Clinical Neurophysiology

The Korean Society of Clinical Neurophysiology (대한임상신경생리학회)
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EEG spikes resembling cardiac M-shaped waves in the EKG: the cerebral M pattern

  • Janati, A.Bruce (Neurology Center of Fairfax) ;
  • ALGhasab, Naif S. (Department of Internal Medicine, Hail University, KFSH&RC) ;
  • Aziz, Tariq (Department of Neurology, King Khalid Hospital) ;
  • Haq, Fazal (Department of Neurology, King Khalid Hospital) ;
  • ALGhassab, Fahad Saad (Department of Dentistry, King Khalid Hospital, Hail University) ;
  • Iqhbal, Tariq (Department of Neurology, King Khalid Hospital) ;
  • Alenazy, Rehab Khaleel (Department of Internal Medicine, Hail University College of Medicine)
  • Received : 2016.06.14
  • Accepted : 2016.09.12
  • Published : 2017.01.31
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Abstract

Studies of interictal epileptiform discharges are essential for improving the diagnosis, classification, and management of epilepsy. In this case series we sought to identify the clinical and neurophysiological significance of bifid spikes, whose pattern bears a strong resemblance to the cardiac M pattern. We hypothesize that, analogous to the cardiac M pattern, the cerebral M pattern is generated by a conduction defect associated with asynchronous spatiotemporal averaging of electrical signals in the cortex, resulting in the signals reaching the scalp with different latencies. Unlike the cardiac M pattern, the pathology underlying the cerebral M pattern is unknown, although congenital CNS anomalies may be a culprit.

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  1. Atypical Interictal Epileptiform Discharges in Electroencephalography vol.8, pp.2, 2018, https://doi.org/10.14581/jer.18009