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D B LINDSLEY

Publications and source records attributed to D B LINDSLEY.

At least 19 recordsLinked to original sources
PubMed1965

VISUALLY EVOKED ELECTROCORTICAL RESPONSES IN KITTENS: DEVELOPMENT OF SPECIFIC AND NONSPECIFIC SYSTEMS.

Visually evoked electrocortical responses were differentiated ontogenetically in young kittens by age of onset, latency, and polarity. A long-latency negative wave, present by 4 days of age and abolished later by lesions of the superior colliculus and pretectal region of the midbrain, is attributed to the non-specific sensory system. A short-latency, positive and negative, diphasic wave, developing by 10 to 15 days of age and blocked by lesion of the lateral geniculate body, is identified with the specific visual system.

Animals↗
PubMed1965

SELECTIVE ATTENTIVENESS AND CORTICAL EVOKED RESPONSES TO VISUAL AND AUDITORY STIMULI.

Cortical evoked responses to flashes and clicks were recorded from human subjects performing visual or auditory tasks under three conditions of selective attentiveness. The subjects were required to attend to the flashes and to ignore alternating clicks, or vice versa. Responses to flashes recorded from the occipital area were larger when attention was directed toward visual stimuli, and responses to click stimuli recorded from the temporal area were larger when attention was directed toward auditory stimuli.

Attention↗
PubMed1964

MICROVIBRATIONS IN MAN AND DOLPHIN.

Microvibrations were recorded from the dorsal body surface of a bottle-nosed dolphin (Tursiops truncatus) while it swam in water and while it lay on a foam rubber mattress in an air environment. Unlike poikilothermic water-living animals which do not manifest microvibrations, this homeothermic mammal has 13-cycle per second microvibrations similar to those of man and other homeotherms. For comparative purposes, microvibrations of 11 cycles per second were recorded from the arm of a man while lying on the same mattress. The nature and origin of these microvibrations is discussed in relation to physiological tremors and shivering.

Animals↗
PubMed1964

VISUAL EVOKED POTENTIALS AS A FUNCTION OF FLASH LUMINANCE AND DURATION.

Computer-averaged evoked potentials were recorded to visual stimuli of constant duration and varying luminance, as well as to flashes whose luminance and duration varied reciprocally. With constant duration, the latency, amplitude, and waveform of the evoked response varied as a function of luminance. The effects of decreasing the luminance on amplitude and waveform of the responses can be balanced by increasing the duration of the flash. This reciprocity between luminance and duration suggests a relationship between apparent brightness and evoked potentials.

Biomedical Research↗
PubMed1964

ATTENTION, VIGILANCE, AND CORTICAL EVOKED-POTENTIALS IN HUMANS.

Computer-averaged potentials evoked from the cortex were recorded to nonsignal stimuli and to randomly interspersed signal stimuli requiring detection and response during prolonged visual vigilance. As detection efficiency diminished over time, the amplitude of evoked responses to nonsignal stimuli decreased and latency increased. Fluctuations in vigilance (attentiveness) during the course of the task also were accompanied by corresponding changes in evoked-potentials to nonsignal stimuli. More specific lapses of attention, revealed by detection failures, resulted in average evoked-responses of lower amplitude to missed as compared with detected signals.

Arousal↗
PubMed1964

BEHAVIORAL AND ELECTROENCEPHALOGRAPHIC AROUSAL TO CONTRASTING NOVEL STIMULATION.

Three-second interruptions of continuous auditory stimulation, as well as 3-second periods of stimulation from the same sound source, were effective in producing behavioral arousal and electrocortical desynchronization in sleeping cats. Thus, stimulus offset as well as onset may serve an arousal function. Some differences in behavioral response and electrocortical desynchronization latency were noted.

Animals↗
PubMed1963

CORTICAL EVOKED POTENTIALS AND PERCEPTION OF PAIRED FLASHES.

Digital computer techniques have been employed to extract cortical evoked potentials to paired visual stimuli. Changes in the evoked potentials have been related to perceptual phenomena varying as a function of the interval between flashes. Evoked potentials to paired stimuli, which gave rise to perceptual interactions, could be approximated by algebraic summation of the responses to the stimuli when presented separately.

Electroencephalography↗
PubMed1954

Psychology.

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Humans↗