Anticipatory Heart Rate Research Articles

Anticipatory Heart Rate Deceleration and Reaction Time in Children with and without Referral for Learning Disability

SROUFE, L. ALAN; SONIES, BARBARA C.; WEST, WINIFRE) D.; and WRIGHT, FRANCIS S. Anticipatory Heart Rate Deceleration and Reaction Time in Children with and without Referral for Learning Disability. CHmID DEVELOPMENT, 1973, 44, 267-273. In a fixed foreperiod reaction-time task boys referred for "special learning disability" showed significantly greater variability of reaction time and significantly less heart rate deceleration prior to the reaction stimulus than age-matched control children. Subsequently, in a double blind experiment to assess the effects of stimulant medication, clinic children given methylphenidate showed significantly greater change on the cardiac deceleration measure than the children given placebo. The drug also shortened median reaction time significantly more than did placebo, even though clinic and control children were not initially different on this measure. Finally, only the control children and the clinic children given the stimulant drug showed a significant correlation between heart rate deceleration and response latency. These results were interpreted as supportive of anticipatory heart rate deceleration and response latency as indices of maintenance of set, an aspect of attention.

Cardiovascular effects of paced respiration and selective attention

The effects of paced respiration (PR) and attentive observation (ATT) on heart rate (HR) and finger-pluse amplitude (FPA ) were investigated in adult fem ale Ss. Although HR responses to trial onset were task dependent, accelerating for Group FR and decelerating for Group ATT, temporally conditioned anticipatory HR deceleration was obtained across tasks. Across trials, HR decelerated and FPA dilated, indicating autonomic habituation to the experimental conditions. Methodological implications for paced respiration research and FPA analysis were discussed.

ANTICIPATORY, EXERCISE, AND RECOVERY HEART RATES OF GIRLS AS AFFECTED BY FOUR RUNNING EVENTS.

The heart rate response to running various distances was studied using five highly trained girls as subjects. A telemetering instrument was employed so that the testing could be done under actual sport conditions. The findings indicated that 1) the anticipatory heart rate just prior to exercise represented 59% of the total adjustment to exercise, 2) the heart rates during exercise were 2.5 times the resting values, and 3) heart rates observed at the end of the 220-, 440-, 880-yard, and mile events were simila cardiac function; exercise Submitted on October 22, 1963

ELECTROCARDIOGRAPHIC TELEMETRY IN SKIERS. ANTICIPATORY AND RECOVERY HEART RATE DURING COMPETITION.

AMONG the many valuable developments in bio-electronics during recent years frequency-modulation telemetering of physiologic data is certainly prominent. Applications related to space travel fostered this instrumentation, but the clinical physiologist is also enjoying its benefits, several types of such telemetering equipment now being commercially available. The advantages of being able to record continuously one or several physiologic phenomena without the necessity of direct instrument attachment to subject or patient are obvious. For the first time the exercise physiologist is able to study variables such as the electrocardiogram, body temperature and electroencephalogram in a wide variety of exercise situations. During the . . .

ANTICIPATORY HEART RATE IN ROPE CLIMBING

Using a newly developed telemetry system, records of heart-rate reaction of human subjects prior to the rope climb were obtained. The data presented on humans represents support for research by Rushmer, who experimented with dogs in demonstrating the role of the motor cortex in controlling the heart boat and particularly its involvement prior to vigorous exercise. The data consists of telemetered heart rates of 10 gymnasts prior to, during and following a rope climb for speed. The percentage of anticipatory heart rate increase over basal value of post-warm-up for the climb was approximately 25 per cent. This amount of anticipatory heart rate for the 10 subjects unassociated with actual energy expenditure would permit support of Rushmer's theory.