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Biomedical subjects

C L YEAGER

Publications and source records attributed to C L YEAGER.

16 recordsLinked to original sources
PubMed1960

Relationship between reaction time and electroencephalographic alpha phase.

Demonstrations of a relationship between human 8 to 13 per second (alpha) electroencephalographic activity and simple visual reaction time can be made at reliable levels of confidence by (i) sampling reaction times to stimuli given at phases of the alpha cycle 10 msec apart, (ii) selecting the phase with the slowest reaction times, and (iii) collecting enough reaction times to stimuli at this and some other control phase for statistical comparison.

Electroencephalography↗
PubMed1960

Simultaneous study of behavior and brain waves.

A technique for the simultaneous audiovisual recording of behavior and brain waves is described. The absence of muscle movement artifact, despite unlimited activity of the patient, suggests that telemetering may be adaptable for routine electroencephalography.

Artifacts↗
PubMed1957

Subclinical epileptic seizures; impairment of motor performance and derivative difficulties.

Modern clinical observations have greatly expanded the conception of the characteristics of the various kinds of epilepsy. By simultaneously recording electroencephalograms and the performance of simple motor tasks, it has been possible to demonstrate the effects of epileptic seizures not detectable by unaided observation and not noted by the patient. The effects of these subclinical seizures have been manifested variously-by a lengthening of the time between stimulus and reaction, by inaccuracies of response to stimuli, or by total cessation of performance. From this study it is suggested that subclinical seizures probably play a role in producing some of the psychiatric conditions associated with the convulsive disorders, as well as primary behavior disturbances and undifferentiated mental deficiency. It is also suggested that such subclinical seizures may possibly contribute to the characteristics of some cases of criminality and antisocial reactions and schizophrenic reactions.

Electroencephalography↗
PubMed1950

The adaptation of electroencephalography to medicine.

Electroencephalography is a valuable aid in diagnosis and prognosis of diseases affecting the brain. It has definite limitations.Abnormal electroencephalograms are either paroxysmal or non-paroxysmal. Both of these changes may be generalized or focal. Epilepsy is primarily associated with paroxysmal activity. Electroencephalography aids in the diagnosis and in determining the severity, course and response to treatment.Non-paroxysmal activity, although less specific in pattern, indicates either generalized or focal pathologic change or some alteration of the normal structure of the brain. Non-paroxysmal activity may give supportive evidence referable to conditions, systemic or intracranial, which disturb the state of consciousness.

Adaptation, Physiological↗