Neurofeedback (NFB) is an operant conditioning procedure, by which the subject learns to control his/her EEG activity. On one hand, Learning Disabled (LD) children have higher values of theta EEG absolute and relative power than normal children, and on the other hand, it has been shown that minimum alpha absolute power is necessary for adequate performance. Ten LD children were selected with higher than normal ratios of theta to alpha absolute power (theta/alpha). The Test Of Variables of Attention (TOVA) was applied. Children were divided into two groups in order to maintain similar IQ values, TOVA values, socioeconomical status, and gender for each group. In the experimental group, NFB was applied in the region with highest ratio, triggering a sound each time the ratio fell below a threshold value. Noncontingent reinforcement was given to the other group. Twenty half-hour sessions were applied, at a rate of 2 per week. At the end of the 20 sessions, TOVA, WISC and EEG were obtained. There was significant improvement in WISC performance in the experimental group that was not observed in the control group. EEG absolute power decreased in delta, theta, alpha and beta bands in the experimental group. Control children only showed a decrease in relative power in the delta band. All changes observed in the experimental group and not observed in the control group indicate better cognitive performance and the presence of greater EEG maturation in the experimental group, which suggests that changes were due not only to development but also to NFB treatment.
American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 4th ed. (DSM-IV); 1994.
2.
LaVaqueTJRossiterT. The ethical use of placebo controls in clinical research: The Declaration of Helsinki. Appl Psychophysiol Biofeedback2001; 26: 23–37.
LubarJFBianchiniKJCalhounWHLambertEWBrodyZHShabsinHS. Spectral analysis of EEG differences between children with and without learning disabilities. J Learn Disabil1985; 18: 403–408.
5.
LubarJFStartwoodMOStartwoodJNO'DonnellPH. Evaluation of the effectiveness of EEG neurofeedback training for ADHD in a clinical setting as measured by changes in TOVA scores, behavioral ratings, and WISC-R performance. Biofeedback Self-Regul1995; 20: 83–99.
6.
LubarJFLubarJO. Neurofeedback assessment and treatment for attention deficit/ hyperactivity disorders. In: EvansJRAbarbanelA (eds). Introduction to Quantitative EEG and Neurofeedback. New York: Academic Press; 1999.
7.
BaehrERosenfeldJPBaehrREarnestC. Clinical use of an alpha asymmetry neurofeedback protocol in the treatment of mood disorders. In: EvansJRAbarbanelA (eds). Introduction to Quantitative EEG and Neurofeedback. New York: Academic Press; 1999.
8.
AbarbanelA. The neural underpinnings of neurofeedback training. In: EvansJRAbarbanelA (eds). Introduction to Quantitative EEG and Neurofeedback. New York: Academic Press; 1999.
9.
PenistonEGKulkoskyPJ. Neurofeedback in the treatment of addictive disorders. In: EvansJRAbarbanelA (eds). Introduction to Quantitative EEG and Neurofeedback. New York: Academic Press; 1999.
10.
LubarJFBahlerWW. Behavioral management of epileptic seizures following EEG biofeedback training of the sensorimotor rhythm. Biofeedback Self-Regul1976; 1: 77–104.
11.
SeifertARLubarJF. Reduction of epileptic seizures through EEG biofeedback training. Biol Psychol1975; 3: 157–184.
12.
StermanMBFriarL. Suppression of seizures in an epileptic following sensorimotor EEG feedback training. Electroencephalogr Clin Neurophysiol1972; 33: 89–95.
13.
TanseyMA. Wechsler (WISC-R) changes following treatment of learning disabilities via EEG biofeedback training in a private practice setting. Aust J Psychol1991; 43: 147–153.
14.
ZametkinAJNordahlTEGrossM. Cerebral glucose metabolism in adults with hyperactivity of childhood onset. New Engl J Med1990; 323: 1361–1366.
15.
RubiaKOvermeyerSTaylorE. Hypofrontality in attention deficit hyperactive disorder during higher-order motor control: A study with functional MRI. Am J Psychiat1999156: 891–896.
16.
HarmonyTMarosiEde LeónDíaz AEBeckerJFernándezT. Effect of sex, psychosocial disadvantages and biological risk factors on EEG maturation. Electroencephalogr Clin Neurophysiol1990; 75: 482–491.
17.
JohnERPrichepLAhnHEastonPFridmanJKayeH. Neurometric evaluation of cognitive dysfunctions and neurological disorders in children. Prog Neurobiol1983; 21: 239–290.
18.
AlvarezAPérez-AvaloMCMorenzaL. Neuropsychological assessment of learning-disorder children with paroxysmal EEG activity. New Issues Neurosci1992; IV (1): 40–50.
19.
HarmonyTMarosiEBeckerJ. Longitudinal quantitative EEG study of children with different performances on a reading-writing test. Electroencephalogr Clin Neurophysiol1995; 95: 429–433.
20.
HughesJR. Electroencephalography and learning disabilities. In: StrattonGMyklebustHR (eds). Progress in Learning Disabilities. New York: Grune and Stratton; 1971.
21.
LesnýLProvaznikKJirasekJKomarekL. The value of EEG, especially of hyperventilation test, in learning disabilities. Act Nerv Sup (Praha)1977; 19: 263–264.
22.
DouglassMV. Behavioural and electrophysiological correlates of visual performance in normal and learning disabled boys. Act Nerv Sup (Praha)1978; 39: 21–25.
FullerPW. Computer estimated alpha attenuation during problem solving in children with learning disabilities. Electroencephalogr Clin Neurophysiol1977; 42: 149–156.
25.
BeckerJVelascoMHarmonyTMarosiELandázuriM. Electroencephalographic characteristics of children with learning disabilities. Clin Electroencephalogr1989; 18: 93–101.
DuffyFHughesJRMirandaFBernadPCookP. Status of quantitative EEG (qEEG) in clinical practice. Clin Electroencephalogr1994; 25(4): VI–XXII.
29.
ThatcherR W. EEG database-guided neurotherapy. In: EvansJRAbarbanelA (eds). Introduction to Quantitative EEG and Neurofeedback. New York: Academic Press; 1999.
30.
MatousekMPetersénI. Frequency analysis of the EEG in normal children and adolescents. In: KellawayPPetersénI (eds). Automation of Clinical Electroencephalography. New York: Raven Press; 1973.
31.
HarmonyTHinojosaGMarosiE. Correlation between EEG spectral parameters and an educational evaluation. Int J Neurosci1990; 54: 147–155.
32.
JohnERAhnHPrichepLTrepetinMBrownDKayeH. Developmental equations for the electroencephalogram. Science1980; 210: 1255–1258.
33.
FernándezTHarmonyTSilvaJ. Relationship of specific EEG frequencies at specific brain areas with performance. NeuroReport1998; 9: 3681–3687.
34.
FernándezTHarmonyTSilva-PereyraJ. Specific EEG frequencies at specific brain areas and performance. NeuroReport2000; 11: 2663–2668.
35.
LearkRADupuyTRGreenbergLMCormanCLKindschiCL. T.O.V.A. Professional Guide. Los Alamitos, CA; Universal Attention Disorders, Inc; 1999.
36.
HernándezJLValdésPBiscayR. A global scale factor in brain topography. Int J Neurosci1994; 76: 267–278.
37.
GalánLBiscayRRodríguezJLPérez-AvaloMCRodríguezR. Testing topographic differences between event related brain potentials by using non-parametric combinations of permutation tests. Electroencephalogr Clin Neurophysiol1977; 102: 240–247.
38.
FernándezT. Análisis electroencefalográfico de la actividad cognoscitiva en niños. PhD thesis. Universidad Nacional Autónoma de México; 1996: 131–141.
39.
Fernández-BouzasAHarmonyTGalánL. Comparison of Z and multivariate statistical brain electromagnetic maps for the localization of brain lesions. Electroencephalogr Clin Neurophysiol1995; 95: 372–380.
40.
HarmonyTFernández-BouzasAMarosiE. Correlation between computed tomography and voltage and current source density spectral EEG parameters in patients with brain lesions. Electroencephalogr Clin Neurophysiol1993; 87: 196–205.
41.
CramJRKohlenbergRJSingerM. Operant control of alpha EEG and the effects of illumination and eye closure. Psychosom Med1977; 39: 11–18.
42.
ValdésPBoschJGraveR. Frequency domain models of the EEG. Brain Topogr1992; 4: 309–319.
43.
FernándezTHarmonyTRodríguezMBernalJSilvaJReyesAMarosiE. EEG activation patterns during the performance of tasks involving different components of mental calculation. Electroencephalogr Clin Neurophysiol1995; 94: 175–182.
44.
RossiterTRLaVaqueTJ. A comparison of EEG biofeedback and psychostimulants in treating attention deficit/hyperactivity disorders. J Neurother1995; 3: 48–59.
45.
Fernández-BouzasAMalacaraFRamírezH. Computer tomography in children with electrophysiological abnormalities. Int J Neurosci1991; 56: 247–254.
46.
LindenMHabibTRadojevicV. A controlled study of the effects of EEG biofeedback on cognition and behavior of children with Attention Deficit Disorder and Learning Disabilities. Biofeedback Self-Regul1996; 21: 35–49.
47.
LubarJFSwartwoodMOSwartwoodJNO'DonellPH. Neurofeedback for the management of Attention Deficit/-Hyperactivity Disorders. In: SchwartzMS (ed.). Biofeedback: A Practitioner's Guide. New York: Guilford, 1995.
48.
StermanMB. Basis concepts and clinical findings in the treatment of seizure disorders with EEG operant conditioning. Clin Electroencephalogr2000; 31: 45–55.
49.
ThatcherRWKrausePJHrybykM. Cortico-cortical associations and EEG coherence: A two-compartmental model. Electroencephalogr Clin Neurophysiol1986; 64: 123–143.
50.
NunezPL. Toward a physics of neocortex. In: NunezPL (ed). Neocortical Dynamics and Human EEG Rhythms. New York: Oxford University Press; 1995.
51.
SteriadeMGloorPLlinásRRLopes da SilvaFHMesulamMM. Basic mechanisms of cerebral rhythmic activities. Electroencephalogr Clin Neurophysiol1990; 76: 481–508.
52.
LubarJF. Neocortical dynamics: Implications for understanding the role of neurofeedback and related techniques for the enhancement of attention. Appl Psychophysiol Biofeedback1997; 22: 111–126.
