Effect of Physical Exhaustion on Cognitive Functioning

1997 ◽  
Vol 84 (1) ◽  
pp. 291-298 ◽  
Author(s):  
Y-A. Féry ◽  
A. Ferry ◽  
A. Vom Hofe ◽  
M. Rieu
Keyword(s):  
Reaction Time ◽  
Perceived Exertion ◽  
Short Term Memory ◽  
Strenuous Exercise ◽  
Decision Task ◽  
Short Term ◽  
Physical Effort ◽  
Difficult Decision ◽  
Central Processing ◽  
Processing Resources

Experiments utilizing reaction time to measure the effects of fatigue on cognition must discern sensitivity of peripheral and central processing to strenuous exercise. The additive factors method enables one to stipulate that if fatigue interacts with subjects' reaction time in a decision task, central processing is affected by fatigue. While pedaling at different intensities, 13 physically-fit men had to perform a series of short-term memory tests. The tests were executed during a constant workload session and a progressive workload session in which subjects pedaled until exhaustion. Subjects provided ratings on Borg's 1970 scale to measure the psychological effects of the physical effort such as perceived exertion. Allocation of processing resources was also measured to determine attentional constraints exerted by the dual-task situation. Analysis showed that decision reaction time was affected only during the exhausting bout of the progressive workload session and for the more difficult decision task. We discuss our results in the context of arousal and the allocation of processing resources.

Reaction time as an index of rehearsal in short-term memory.

1969 ◽  
Vol 82 (3) ◽  
pp. 566-570 ◽  
Author(s):  
Robert F. Stanners ◽  
Gary F. Meunier ◽  
Donald B. Headley
Keyword(s):  
Reaction Time ◽  
Short Term Memory ◽  
Short Term ◽  
Term Memory

Improvement of Visual Short-Term Memory Characteristics in Monkeys: Effect of an Antioxidant

Perception ◽  
1997 ◽  
Vol 26 (1_suppl) ◽  
pp. 115-115
Author(s):  
I V Chueva ◽  
K N Dudkin
Keyword(s):  
Reaction Time ◽  
Spatial Information ◽  
Short Term Memory ◽  
Information Storage ◽  
Motor Reaction ◽  
Short Term ◽  
Systemic Injection ◽  
Term Memory ◽  
Motor Reaction Time ◽  
Visual Short Term Memory

Visual short-term memory was tested in a delayed-discrimination task on rhesus monkeys before and after a systemic injection of the antioxidant oxymetacil (4 – 7 mg kg−1). Monkeys had to discriminate stimuli with different visual attributes (colour, orientation, spatial frequency, size, contrast, spatial relationships between visual objects) by a delayed (0 – 32 s) instrumental reflex. Oxymetacil had no influence upon visual discrimination without delay, but after injection of this drug the delayed discrimination (associated with mechanisms of short-term memory) of different stimuli was significantly improved. Oxymetacil increased the duration of short-term storage of spatial information by a factor of 2 – 4 and decreased motor reaction time. Application of oxymetacil in the same doses produced similar results for delayed discrimination of black-and-white gratings, or geometrical figures of different orientations and size. The duration of short-term information storage was doubled or trebled and the motor reaction time was decreased. If monkeys were required to discriminate colour figures, the duration of short-term information storage was also doubled, being longer than for any of the other tasks. The results are discussed in terms of effects on cortical interregional synchronisation mechanisms responsible for control processes such as attention.

The Time Course of Stimulus Expectation in a Saccadic Decision Task

2007 ◽  
Vol 97 (4) ◽  
pp. 2722-2730 ◽  
Author(s):  
A. Oswal ◽  
Miriam Ogden ◽  
R.H.S. Carpenter
Keyword(s):  
Reaction Time ◽  
Time Course ◽  
Prior Probability ◽  
Quantitative Relationship ◽  
Neural Representation ◽  
Decision Task ◽  
Short Term ◽  
Low Pass ◽  
Quantitative Explanation

Because the time to respond to a stimulus depend markedly on expectation, measurements of reaction time can, conversely, provide information about the brain's estimate of the probability of a stimulus. Previous studies have shown that the quantitative relationship between reaction time and static, long-term expectation or prior probability can be explained economically by the LATER model of decision reaction time. What is not known, however, is how the neural representation of expectation changes in the short term, as a result of immediate cues. Here, we manipulate the foreperiod—the delay between the start of a trial and the appearance of the stimulus—to see how saccadic latency, and thus expectation, varies with different delays. It appears that LATER can provide a quantitative explanation of this relationship, in terms both of average latencies and of their statistical distribution. We also show that expectancy appears to be subject to a process of low-pass filtering, analogous to the spatial blur that degrades visual acuity.

Effects of marihuana on reaction time and short-term memory in human volunteers

1977 ◽  
Vol 6 (1) ◽  
pp. 73-77 ◽  
Author(s):  
A.Michael Rossi ◽  
John C. Kuehnle ◽  
Jack H. Mendelson
Keyword(s):  
Reaction Time ◽  
Short Term Memory ◽  
Short Term ◽  
Term Memory ◽  
Human Volunteers

EVALUATING SHORT-TERM EXPOSURE TO WI-FI SIGNALS ON STUDENTS’ REACTION TIME, SHORT-TERM MEMORY AND REASONING ABILITY

2019 ◽  
Vol 187 (3) ◽  
pp. 279-285 ◽  
Author(s):  
M A Hosseini ◽  
A Hosseini ◽  
S Jarideh ◽  
H Argasi ◽  
F Shekoohi-Shooli ◽  
...  
Keyword(s):  
Reaction Time ◽  
Field Strength ◽  
Electric Field ◽  
Cognitive Functions ◽  
Short Term Memory ◽  
Reasoning Ability ◽  
Medical Sciences ◽  
Short Term ◽  
Term Memory ◽  
Short Term Exposure

Abstract This study investigated the effect of short-term exposure to Wi-Fi signals on the cognitive functions of the mind. After obtaining permission from the local Ethics Committee of Shiraz University of Medical Sciences and approval by the Iranian Registry of Clinical Trials (IRCT2017041233398N1), 45 male and female students from Shiraz University of Medical Sciences volunteered to participate in this study. They were exposed to Wi-Fi signals in two sham and exposure sessions, each for 2 hours. After completion, they took part in reaction time, short-term memory, and reasoning ability tests. After scoring, the data were analysed by SPSS software. In addition, the electric field strength and power density were calculated. The results showed no statistically significant differences between the mean scores of reaction time, short-term memory, and reasoning ability in sham and exposure. Also, the obtained values from the electric field strength and power density (E = 4.1 Vm−1, P = 0.446 Wm−2) were lower than that of threshold values by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). Our results can greatly reduce concerns regarding the effects of short-term exposure to Wi-Fi waves on cognitive functions.

Physical effort and short term memory.

1973 ◽  
Author(s):  
Stanislav Dornic ◽  
Gunnar Borg ◽  
Monica Ohlsson
Keyword(s):  
Short Term Memory ◽  
Short Term ◽  
Physical Effort ◽  
Term Memory

Listening to music during indoor cycling elicits higher internal loads during prolonged endurance exercise

2021 ◽  
Vol 15 (3) ◽  
pp. 153-166
Author(s):  
Milena A. Dos Santos ◽  
Felipe P. Carpes
Keyword(s):  
Heart Rate ◽  
Reaction Time ◽  
Selective Attention ◽  
Endurance Exercise ◽  
Muscle Activation ◽  
Perceived Exertion ◽  
Short Term Memory ◽  
Moderate Intensity ◽  
Attention And Memory ◽  
Cognitive Responses

BACKGROUND: Dissociation by music may impact the rate of perceived exertion (RPE), which is an indicator of internal loads during exercise. However, it is not clear how music affects the RPE, neuromuscular, and cognitive responses to exercise. AIM: To determine whether listening to preferred music during indoor endurance exercise influences RPE, neuromuscular, and cognitive responses in healthy individuals. METHOD: Thirteen healthy adults performed sessions of prolonged indoor cycling at moderate intensity while listening or not to preferred music. Reaction time, selective attention, and memory were evaluated before, during, and/or after the exercise sessions. RPE, heart rate, muscle activation, pedaling torque, and cadence were recorded during the exercises. RESULTS: RPE (P = 0.004, d = 0.40), heart rate (P = 0.048, d = 0.53) and cadence (P = 0,043; d = 0.51) were higher in the music session compared to no music. Selective attention (P = 0.233), simple reaction time (P = 0.360), working and short-term memory (P > 0.05), as well as torque (P = 0.262) and muscle activation (RMS and MDF, P > 0.05) did not differ between music and no music sessions. CONCLUSION: Indoor cycling while listening to preferred music elicited higher internal loads, which we consider a result of higher cardiovascular demand. However, the effects of music on neuromuscular and cognitive responses were not evident. We conclude that music can be helpful to improve demand during indoor exercise.

Sign in / Sign up

Export Citation Format

Share Document