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Copyright of Zeitschrift für Kinderheilkunde is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Zeitschrift für Kinderheilkunde is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Archiv für Toxikologie is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Archiv für Toxikologie is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Klinische Wochenschrift is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

51 infants were exposed while asleep during the morning and night to periods of 2-5 min of mixed noise (90-7000 Hz); changes in the peripheral circulation were recorded by means of a Hensel Fluvograph on the forehead and the back of the left hand. At noise levels below 65 dB(B), no infant showed changes in peripheral resistance; at 70 dB(B) about one-third of the infants and at 80 dB(B) about twothirds showed lowered resistance. At 90 dB(B) vasoconstriction occurred in all cases. There was no difference between day and night recordings. The intensity of the vasoconstriction response was not proportional to the noise stimulus. The peripheral vasoconstriction regularly ensued a few seconds after the noise started, reaching a maximum during the second minute. On cessation of the noise, the normal level of the peripheral circulation was quickly restored, in many cases even before the noise ceased. The contrasts with the reactions of adults in whom vasoconstriction persists throughout the noise phase. Infants show alarm reactions to repeated, loud, high-frequency noises and the resulting sympathicotonic reaction persists for several minutes. Clearly, repeated short noise stimuli of this type have a cumulative effect. [ABSTRACT FROM AUTHOR]

Copyright of Zeitschrift für Kinderheilkunde is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In two groups of infants (3-53 weeks old) skin temperatures were controlled in different areas of the trunk-i.e.: regions of sternum, lungs, heart, liver, spleen, kidneys-at different room-temperatures (group I: 21-25°C; group II: 29-32°C). Rectal temperatures of some probands in both groups also had been controlled simultaneously. A definite change in the reaction to heat was proofed in different periods of the first year of life. In higher environmental temperatures the skin temperature was almost constant at every controll-point of the skin, even in older infants. In lower environmental temperatures the skin temperatures lowered continuously with age till 7. to 9. moth. From 10. to 12. month the lowering of skin temperature discontinued. The rectal temperatures were relatively constant in all infants. Only in infants from 7. to 12. month, whose skin temperatures were controlled in lower as well as in higher environmental temperatures, a tendency to higher rectal temperatures was proofed in warmer environmental temperatures. The significance of these results is discussed. [ABSTRACT FROM AUTHOR]