The evoked potentials : W. Cobb and C. Morocutti (Editors). (Electroenceph. clin. Neurophysiol., Suppl. No. 26, Elsevier, Amsterdam, New York, 1968, 218 p., Dfl. 62.50, U.S. $22.50)

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Current practice of clinical electroencephalography : D.W. Klass and D.D. Daly (Eds.) (Raven Press, New York, 1979, 544 p., U.S. $ 45.00)

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Explorers of the brain : L. A. Stevens. (A. A. Knopf, New York, 1971, 348 p., $7.95).

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American electroencephalographic society : Seventeenth annual meeting San Francisco, Calif., October 7-9, 1963

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OBSERVATIONS ON PHOTICALLY EVOKED OCCIPITAL AND VERTEX WAVES DURING SLEEP IN MAN *

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/75014/1/j.1749-6632.1964.tb26756.x.pd

The electroencephalogram in hepato-lenticular degeneration (Wilson's disease)

The literature on EEG's in hepato-lenticular degeneration has been reviewed; over half of 80 reported patients had abnormal tracings. Eight additional EEG's on seven patients are presented; two definitely abnormal, three borderline and three normal. Trends include continuous slowing of background frequency and sharp diphasic forms bicentrally and elsewhere. There is no specific EEG abnormality in this disease.Although there are many exeptions, in general the degree of EEG abnormality parallels the severity of clinical involvement. No individual clinical finding consistently relates to EEG abnormality, although there is a suggestion both from our cases and those previously reported that tremor and incoordination may show such a relationship.Some patients have EEG improvement during or after treatment; it is uncertain whether this change is cause-and-effect or coincidence. More studies of pre- and post-treatment EEG's would be of interest.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/32297/1/0000364.pd

Observations on early components of the visual evoked response and occipital rhythms,

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/32082/1/0000131.pd

Electrophysiological findings in cortical blindness. Report of a case,

Spontaneous cerebral activity and visual evoked responses have been described in a patient with post-traumatic cortical blindness who was studied over a period of 4 weeks. The resting occipital pattern was extremely small in amplitude but composed of frequencies largely within the normal alpha range. No evidence of light-induced alpha blocking could be detected. Averaged evoked responses derived from leads placed over the occipital poles were abnormal, in that they were rudimentary and inconsistent, none of the normal initial 5 waves being identifiable with certainty. The presence of a light-evoked, prominent vertex wave, dissimilar from that evoked by sound, was noteworthy in view of the virtual absence of an occipital response and severity of visual deficit.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/33470/1/0000875.pd

Fourteen and six c/sec positive bursts in comatose patients

Of ten patients with Reye's syndrome, there were five with stage II or III coma where EEGs revealed 14 c/sec positive bursst in a background of diffuse delta waves. Positive bursts disappeared upon EEG improvement in two survivors and when the EEG became nearly isoelectric in two other patients.Although 14 and 6 c/sec positive bursts are seen commonly during sleep in normal young persons, their occurence in association with diffuse delta waves in acutely ill, comatose patients has been rarely reported.It is not certain whether the present findings should be regarded as selective preservation of a type of sleep pattern or whether there are special factors that enhance positive bursts in stage II or III coma of Reye's syndrome.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/21766/1/0000160.pd

Visually evoked responses in migraine

Visually evoked responses from the central and occipital areas were compared between 50 patients with migraine (during the headache-free period) and 46 control subjects. The findings suggest that migraine might be associated with altered cerebral responses to visual stimulation. Of three occipital surface negative components studied, the second ("intermediate" cluster) tended to appear slightly earlier in the migrainous individuals whereas the third (OIII) appeared later. Average amplitude of the second major surface positive wave (OIV) was lower. These differences were significant for the total experimental population and the female subgroup. Latency of the OII component (surface positive) was longer for females with migraine, a finding not present for the total population. No significant differences emerged between male experimental and control groups. Vertex responses were similar in migrainous and normal subjects. The routine EEG was abnormal in eleven of 50 (22%) patients.Average pupil size of the patients with migraine was significantly smaller than that of the controls.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/33428/1/0000830.pd