Accession Number : AD0458298


Title :   SOME EFFECTS OF RESPIRATORY AND CARDIAL CYCLES.


Descriptive Note : Summary progress rept.,


Corporate Author : LANGLEY PORTER NEUROPSYCHIATRIC INST SAN FRANCISCO CA


Personal Author(s) : Callaway, Enoch


Report Date : 20 Jan 1965


Pagination or Media Count : 46


Abstract : This report deals with changes in the central nervous system function that can be related to phases of respiratory cycle and phases of the cardiac cycle. Primary emphasis is on valuntary motor function. The report consists of six sections. Section 1 demonstrates that involuntary acts do not occur with equal frequency throughout the cardiac cycle, although there is great individual variability. Young subjects with low blood pressure tend to institute fewest acts at the time of systole and more frequently institute acts midway through the cardiac cycle. Section 2 demonstrates that the form of the average vertex visual evoked response depends on phase both of respiratory and cardiac cycles. Section 3 similarly deals with electroencephalogram and demonstrates that EEG alpha waves are synchronized with the cardiac cycle. Section 4 shows that reaction time is fastest when stimuli are given at expiration. The discrepancy between this finding and other reports in the literature is discussed. Section 5 shows that the monosynaptic reflex response of the calf muscle produced by stimulating the tibial nerve (the H reflex response) is largest in inspiration in most subjects, although in one subject the reverse results were obtained at a statistically significant level. (Author)


Descriptors :   PSYCHOPHYSIOLOGY , CARDIOVASCULAR SYSTEM , MOTOR REACTIONS , BLOOD PRESSURE , RESPIRATION , ELECTROCARDIOGRAPHY , CORRELATION TECHNIQUES , ANALYSIS OF VARIANCE , CENTRAL NERVOUS SYSTEM , HEART , REACTION(PSYCHOLOGY) , VISUAL PERCEPTION , EXCITATION , ELECTROENCEPHALOGRAPHY


Distribution Statement : APPROVED FOR PUBLIC RELEASE