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Self-regulation of slow cortical potentials in epilepsy: A retrial with analysis of influencing factors

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Check out this Knowledge Base article from StressTherapy Solutions: Self-regulation of slow cortical potentials in epilepsy: A retrial with analysis of influencing factors.

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Study at a glance

Area
Epilepsy & Seizures
Study type
Pilot / open study
Authors
Kotchoubey B, Schneider D, Schleichert H, Strehl U, Uhlmann C, Blankenhorn V, Fröscher W, Birbaumer N
Journal
Epilepsy Research
Year
1996
Participants
12 adults with drug-resistant focal epilepsy (ages 21-44)
Population
Adults
Protocol
slow cortical potential neurofeedback
Sessions
20 sessions (two daily over two weeks; first phase of a 35-session program)

Key findings

  • Patients significantly differentiated positive from negative shifts, more so with feedback than in transfer trials
  • Positivity amplitude rose steadily across sessions in both feedback and transfer trials
  • Largest negativity came in session 5; later negative shifts were briefer and faded within trials
  • Mean seizure severity (frequency weighted by strength) fell significantly compared with before training

DOI 10.1016/s0920-1211(96)00082-4 → PubMed 8956926 →

Twelve adults with drug-resistant focal epilepsy completed 20 sessions of biofeedback training to shift their slow cortical potentials (SCPs) at the top of the head in either a negative or positive direction, including transfer trials without feedback. Patients learned to tell the two conditions apart, and seizure severity dropped after training. The authors conclude patients could learn to calm cortical activity, and suggest they grew reluctant to produce strong negative shifts because these may signal over-excitation.