Body posture affects electroencephalographic activity and psychomotor vigilance task performance in sleep-deprived subjects

Caldwell, John A.; Prazinko, Brian; Caldwell, J. L.

doi:10.1016/s1388-2457(02)00283-3

Cited by 131 publications

(118 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several research groups have identified frontal theta in humans, which increases in power with the working memory load in the n-back and the Sternberg task (Rouw et al, 1997;Jensen and Tesche, 2002). As well, the theta rhythm (4-8 Hz) recently has been implicated in encoding and retrieving information (Caldwell et al, 2003;Srinivasan, 2007). A number of studies have shown that a mental image usually begins with the representation process of an object through the reactivation of information stored in the long-term memory (Tippett, 1992).…”

Section: Discussionmentioning

confidence: 99%

EEG dynamics reflects the partial and holistic effects in mental imagery generation

Jian

Tang

Zhou

et al. 2010

J. Zhejiang Univ. Sci. B

View full text Add to dashboard Cite

Abstract:Mental imagery generation is essential in the retrieval and storage of knowledge. Previous studies have indicated that the holistic properties of mental imagery generation can be evaluated more easily than the partial properties. However, the relationship between partial and holistic mental imagery generations has not been clearly demonstrated. To address this issue, we designed a task to investigate the changes in the spectrum of the electroencephalogram (EEG) during partial or holistic imagery generation. EEG signals were obtained from 18 healthy subjects, and a statistical measure of spectral dynamics between two EEG signals in per frequency band was performed. Additionally, a bicoherence spectrum analysis was used to detect the phase coupling within these two imagery conditions. Our results indicated that EEG of the partial imagery appeared earlier and stronger than that of the holistic imagery in the theta (5-8 Hz) range in a time window around 220 to 300 ms after cue onset, and a slight decrease in the alpha (8-12 Hz) band was observed at around 270 ms. The scalp topography of these changes in the theta and alpha bands distributed overall significantly in the frontal and central-temporal areas. The significant phase coupling within two conditions was remarkable at high frequency. From these results, we infer that there are complex relations between partial and holistic imageries. The generation of partial mental imagery is not a subprocess of holistic imagery, but it is relevant to holistic imagery and requires correct modification from the holistic information.

show abstract

Section: Discussionmentioning

confidence: 99%

EEG dynamics reflects the partial and holistic effects in mental imagery generation

Jian

Tang

Zhou

et al. 2010

J. Zhejiang Univ. Sci. B

View full text Add to dashboard Cite

show abstract

“…The increase in absolute power is related to slowing of RT and increased errors on a vigilance task (Corsi-Cabrera, et al 1996;Lorenzo, 1995). Standing upright attenuates the increase in theta activity seen with sleep deprivation (along with RT changes; see above) (Caldwell, 2002). Awake EEG changes are also seen following sleep fragmentation despite normal total sleep time.…”

Section: Electrophysiological Measuresmentioning

confidence: 97%

“…The increase in RT is greater when there is a relatively long interval between a warning signal and the imperative stimulus, less if the interval is short, suggesting that phasic arousal or alertness deteriorates quickly under sleep deprivation (Cochran, 1992). RT performance in overnight sleep deprived subjects is slowed when seated, but normal when standing (Caldwell et al, 2002). The effects of sleep deprivation are complicated by the interaction of diurnal variation (circadian phase) with monotonic effects (length of sleep deprivation), consistent with the two-process model proposed by Borbely (Achermann and Borbely, 2003;Babkoff et al, 1991;Cajochen, 1999).…”

Section: Sleep Lossmentioning

confidence: 99%

“…These features are also seen with sleep deprivation. During and following sleep deprivation there is a progressive increase in absolute power and in relative theta and delta power in the EEG background, accompanied by an increase in slow eye movements, and correlated with subjective sleepiness (Caldwell, 2002;Cajochen et al, 1995;Lorenzo, 1995;Smith, 2002;Torsvall and Akerstedt, 1988b). This EEG slowing gradually increases until the sleep deprived subject dozes off (Torsvall and Akerstedt, 1988b).…”

Section: Electrophysiological Measuresmentioning

confidence: 99%

See 1 more Smart Citation

Vigilance, alertness, or sustained attention: physiological basis and measurement

Oken

Salinsky

Elsas

2006

Clinical Neurophysiology

678

463

View full text Add to dashboard Cite

Vigilance is a term with varied definitions but the most common usage is sustained attention or tonic alertness. This usage of vigilance implies both the degree of arousal on the sleep-wake axis and the level of cognitive performance. There are many interacting neural and neurotransmitter systems that affect vigilance. Most studies of vigilance have relied on states where the sleep-wake state is altered, e.g. drowsiness, sleep-deprivation, and CNS-active drugs, but there are factors ranging from psychophysics to motivation that may impact vigilance. While EEG is the most commonly studied physiologic measure of vigilance, various measures of eye movement and of autonomic nervous system activity have also been used. This review paper discusses the underlying neural basis of vigilance and its assessment using physiologic tools. Since, assessment of vigilance requires assessment of cognitive function this aspect is also discussed.

show abstract

“…Considerable idiopathic changes were localized within the tail and the hairless parts of the paws both during the total and selective deprivation of paradoxical sleep. It was postulated that these effects might be linked either to the change in the release pattern of the growth hormone (GH, a hormone promoting anabolic processes), namely, during the experiment reduced the number of errors in the tests [56]. This effect, however, could not be seen before the 20th hour of sleep deprivation.…”

Section: Dermal Effectsmentioning

confidence: 99%

Consequences of sleep deprivation

Orzeł-Gryglewska¹

2010

International Journal of Occupational Medicine and Environmental Health

215

133

View full text Add to dashboard Cite

This paper presents the history of research and the results of recent studies on the effects of sleep deprivation in animals and humans. Humans can bear several days of continuous sleeplessness, experiencing deterioration in wellbeing and effectiveness; however, also a shorter reduction in the sleep time may lead to deteriorated functioning. Sleeplessness accounts for impaired perception, difficulties in keeping concentration, vision disturbances, slower reactions, as well as the appearance of microepisodes of sleep during wakefulness which lead to lower capabilities and efficiency of task performance and to increased number of errors. Sleep deprivation results in poor memorizing, schematic thinking, which yields wrong decisions, and emotional disturbances such as deteriorated interpersonal responses and increased aggressiveness. The symptoms are accompanied by brain tissue hypometabolism, particularly in the thalamus, prefrontal, frontal and occipital cortex and motor speech centres. Sleep deficiency intensifies muscle tonus and coexisting tremor, speech performance becomes monotonous and unclear, and sensitivity to pain is higher. Sleeplessness also relates to the changes in the immune response and the pattern of hormonal secretion, of the growth hormone in particular. The risk of obesity, diabetes and cardiovascular disease increases. The impairment of performance which is caused by 20-25 hours of sleeplessness is comparable to that after ethanol intoxication at the level of 0.10% blood alcohol concentration. The consequences of chronic sleep reduction or a shallow sleep repeated for several days tend to accumulate and resemble the effects of acute sleep deprivation lasting several dozen hours. At work, such effects hinder proper performance of many essential tasks and in extreme situations (machine operation or vehicle driving), sleep loss may be hazardous to the worker and his/her environment.

show abstract

Body posture affects electroencephalographic activity and psychomotor vigilance task performance in sleep-deprived subjects

Cited by 131 publications

References 10 publications

EEG dynamics reflects the partial and holistic effects in mental imagery generation

EEG dynamics reflects the partial and holistic effects in mental imagery generation

Vigilance, alertness, or sustained attention: physiological basis and measurement

Consequences of sleep deprivation

Contact Info

Product

Resources

About