Ballistocardiographic response to hyperthermia

1960 ◽  
Vol 15 (3) ◽  
pp. 445-448 ◽  
Author(s):  
Arthur J. Moss ◽  
Bruce E. Bradley
Keyword(s):  
Body Temperature ◽  
Cardiovascular Response ◽  
Peripheral Resistance ◽  
Low Frequency ◽  
Normal Subjects ◽  
The Body ◽  
Ventricular Ejection ◽  
Time Duration ◽  
J Wave

The body temperature of five normal subjects was raised to levels above 100.0°F through the use of a rubberized anti-exposure suit. The induced hyperkinetic cardiovascular state was studied on an ultra-low-frequency force ballistocardiogram. The ejection deflection (HI wave) consistently increased in amplitude and became more vertical during the hyperthermic state. The time duration from the onset of ventricular ejection to the J wave peak generally was shortened. These changes were interpreted in terms of the known cardiovascular response to the hyperkinetic state. Diminished peripheral resistance and its sequelae seemed to play a major role in the ballistocardiographic changes seen with hyperthermia. Submitted on November 23, 1959

Circadian Rhythms of Serum Thyrotrophin and Body Temperature in Euthyroid Individuals and their Responses to Warming

1984 ◽  
Vol 67 (4) ◽  
pp. 433-437 ◽  
Author(s):  
B. P. O'malley ◽  
A. Richardson ◽  
N. Cook ◽  
S. Swart ◽  
F. D. Rosenthal
Keyword(s):  
Body Temperature ◽  
Circadian Rhythms ◽  
Diurnal Rhythm ◽  
Normal Subjects ◽  
The Body ◽  
Diurnal Rhythms ◽  
Tsh Levels

1. The diurnal rhythms of body temperature and serum thyrotrophin (TSH) levels in euthyroid individuals behaved inversely to one another. 2. An artificially induced rise in the body temperature of these individuals was accompanied by a fall in serum thyrotrophin levels, the amplitudes of their respective rhythms decreasing simultaneously. 3. There was a marked correlation between the degrees of change in body temperature and circulating thyrotrophin levels respectively during warming. 4. In normal subjects manipulation of the diurnal rhythm of body temperature brings about inverse alterations in the thyrotrophin rhythm.

Eye movements during torso rotations in labyrinthine-defective subjects

1999 ◽  
Vol 9 (6) ◽  
pp. 401-412
Author(s):  
Y.P. Ivanenko ◽  
I. Viaud-Delmon ◽  
A. Sémont ◽  
V.S. Gurfinkel ◽  
A. Berthoz
Keyword(s):  
Eye Movements ◽  
Slow Component ◽  
Low Frequency ◽  
Vestibular Function ◽  
Head Rotation ◽  
Normal Subjects ◽  
The Body ◽  
Vestibular Loss ◽  
Significant Difference ◽  
Oculomotor Responses

The aim of this study was to examine whether the chronic loss of vestibular function modifies perceptual and oculomotor responses during torso rotations in darkness. Subjects (4 patients with complete vestibular loss and 7 healthy volunteers) were seated on a rotating chair. Stimuli consisted of sinusoidal chair rotations ( ± 30 ∘ , 0.1 Hz and 0.011 Hz). We used 2 conditions: space stationary head (neck stimulation) and space stationary head and shoulders (torso stimulation). Horizontal eye deviations and slow component of eye movements were analysed. The results showed that eye movements and perception of head motion in space during neck stimulation were similar to those during torso stimulation both in normal and labyrinthine-defective (LD) subjects. During low-frequency chair rotations (0.011 Hz) all subjects perceived illusory head or head and shoulder rotation in space (as if the lower part of the body was stationary relative to the room) and shifted their gaze in the direction of illusory head rotation. In these conditions there was no significant difference in eye movements between normal and LD subjects. During higher frequency chair rotations (0.1 Hz), LD subjects had significantly larger eye deviations as well as increases in the gain of the slow component of eye movements relative to normals. In these conditions patients mostly perceived illusory head or head and shoulder rotation in space while normal subjects mainly perceived the head as stationary in space. The results indicate that 1) neck and torso rotations can evoke similar ocular responses in LD subjects, 2) the chronic loss of vestibular function modifies the representation of axial body segment motion relative to space.

The Design of Indoor Infrared Alarm

2014 ◽  
Vol 651-653 ◽  
pp. 1105-1108
Author(s):  
Qi Wei Wei ◽  
Chun Ping Yang
Keyword(s):  
Body Temperature ◽  
Low Frequency ◽  
The Body ◽  
Infrared Detection ◽  
Infrared Sensor ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
Frequency Signal ◽  
Detection Technology ◽  
Microcomputer Control

This design uses the pyroelectric infrared detection technology, single-chip microcomputer control. Pyroelectric infrared sensor sensing the infrared thermal radiation (the body temperature is 37 degrees) of the invaders, converting it into a low frequency signal, passing to microcontroller through amplified circuit. Finally, it implements anti-theft through the alarm module.

scholarly journals The Composition of Human Perspiration (Samuel Hyde Memorial Lecture)

1934 ◽  
Vol 27 (7) ◽  
pp. 839-848 ◽  
Author(s):  
B. A. McSwiney
Keyword(s):  
Nervous System ◽  
Lactic Acid ◽  
Body Temperature ◽  
Normal Subjects ◽  
The Body ◽  
Sweat Glands ◽  
Memorial Lecture ◽  
Acetyl Choline ◽  
Warm Blood ◽  
Stimulation Of

Water given off by the skin is classified as insensible and sensible perspiration. Under normal conditions about 600 to 700 c.c. is evaporated from the skin in twentyfour hours. The chief physiological significance of the perspiration is to assist in regulating the body temperature. The constituents of perspiration are very variable. The average values calculated from the examination of fourteen male specimens and ten female specimens are given below:— [Formula: see text] Examination of the figures obtained for the sweat shed by rheumatic subjects shows no marked divergence from those recorded for normal subjects. Lactic acid is stated to be present in relatively large amounts in sweat, but these results have not been confirmed. Moss (1923) demonstrated the importance of the loss of chloride which occurred during continued sweating. He showed that symptoms of water-poisoning occurred when men engaged in hard work in hot places drank water freely. Hancock, Whitehouse and Haldane (1930) point out that the percentage of chloride in sweat increases markedly with duration of sweating, and suggest that water poisoning is due to an alteration in the diffusion pressure of water in the body. The secretion is under control of the nervous system, and is normally excited through stimulation of the centres by warm blood. The sweat-glands are innervated by fibres of the sympathetic system. Adrenaline has, however, no action on the glands, while pilocarpine excites and atropine paralyses. Recent investigations suggest that acetyl-choline is liberated at the nerve-endings.

Effect of CO2 on hyperventilation produced by vibration

1963 ◽  
Vol 18 (2) ◽  
pp. 349-352
Author(s):  
W. A. Young ◽  
D. B. Shaw ◽  
L. J. Buckles ◽  
J. S. Outerbridge ◽  
C. E. Reeves ◽  
...  
Keyword(s):  
Ventilatory Response ◽  
Low Frequency ◽  
Normal Subjects ◽  
Threshold Level ◽  
High Amplitude ◽  
The Body

Twenty-five normal subjects were exposed to low-frequency high-amplitude passive vibratory movements of the body. Hyperventilation and hypocapnia resulted in most cases. Restoration of the alveolar Pco2 to its resting value by the addition of CO2 to the inspired air while vibration continued gave rise to no further increase in ventilation. It is concluded that the hyperventilation produced by vibration is not moderated by the resulting fall in arterial Pco2. Thus, observed differences between the ventilatory response of different individuals to vibration are unlikely to be due to differences in sensitivity to CO2. Several other studies have demonstrated a threshold level of alveolar CO2 below which respiration is not stimulated by CO2. The lack of response to CO2 in the present experiments may be due to the fact that they have been carried out at levels of alveolar CO2 below this threshold Submitted on September 21, 1962

Antipyretic Plants: An Updated Review

2020 ◽  
Vol 16 (1) ◽  
pp. 4-12
Author(s):  
Vandana Garg ◽  
Rohit Dutt
Keyword(s):  
Side Effects ◽  
Body Temperature ◽  
Medicinal Plants ◽  
Inflammatory Mediators ◽  
Review Paper ◽  
The Body ◽  
Hypothalamic Area ◽  
Antipyretic Activity ◽  
Disease States ◽  
Elevated Body Temperature

Background: Fever, is known as pyrexia, may occur due to infection, inflammation, or any tissue damage and disease states. Normally, the infected or damaged tissue initiates the enhanced formation of pro-inflammatory mediators like cytokines which further increases the synthesis of prostaglandin E2 (PgE2) near the hypothalamic area and thereby trigger the hypothalamus to elevate the body temperature. Objective: Antipyretics are the agents which reduce the elevated body temperature. The most commonly used antipyretic agent, paracetamol, may be fatal due to its side effects. Methods: In this review paper, Chemical Abstracts, Google Scholar, PubMed, and Science Direct were the sources for the published article to collect information regarding antipyretic activity. Results: This review compiles the antipyretic plants that may be useful to treat fever due to various diseases. Conclusion: These medicinal plants could be good alternatives for traditional allopathic antipyretics.

A Litreary Review of Vishama Jwara and its principle of treatment

2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Dr.Saurabh Parauha ◽  
Hullur M. A. ◽  
Prashanth A. S.
Keyword(s):  
High Temperature ◽  
Body Temperature ◽  
The State ◽  
The Body ◽  
Cardinal Symptoms

In Ayurveda, Jwara is not merely the concept of raised body temperature, but as is said in Charaka Samhita, 'Deha- Indriya- Manah- Santap' is the cardinal symptoms of Jwara. This can be defined as the state where the body, mind as well as sense oragans suffer due to the high temperature. Vishamajwara is a type of fever, which is described in all Ayurvedic texts. Charaka mentioned Vishamajwara and Chakrapani have commented on Vishamajwara as Bhutanubanda, Susruta affirmed that Aagantuchhanubhandohi praysho Vishamajware. Madhavakara has also recognised Vishamajwara as Bhutabhishangajanya (infected by microorganism). Vishamajwara is irregular (inconsistent) in it's Arambha (nature of onset commitment), Kriya (action production of symptoms) and Kala (time of appearance) and possesses Anushanga (persistence for long periods). The treatment of this disease depends upon Vegavastha and Avegavastha of Jwara. Various Shodhana and Shamana procedures are mentioned in classics to treat Visham Jwara.

ADAPTATION OF WHITE MICE (MUS MUSCULUS) TO REPEATED COOLING

1967 ◽  
Vol 45 (3) ◽  
pp. 321-327 ◽  
Author(s):  
David M. Ogilvie
Keyword(s):  
Body Temperature ◽  
Rectal Temperature ◽  
Cold Exposure ◽  
Mus Musculus ◽  
Room Temperature ◽  
The Body ◽  
Progressive Decrease

The effects, on the body temperature of white mice, of repeated short exposures to cold were investigated using two methods of restraint. Animals held in a flattened posture became hypothermic at room temperature, cooled more than five times as fast at −10 °C as mice that could adopt a heat-conserving posture, and continued to cool for some time after they were removed from the cold. With repeated tests, cooling at room temperature decreased, and an improvement in re warming ability was observed. In addition, with lightly restrained mice, the fall in rectal temperature during cold exposure showed a progressive decrease, a phenomenon not observed with severely restrained animals.

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