Look up ultradian in Wiktionary, the free dictionary.
In chronobiology, an ultradian rhythm is a recurrent period or cycle repeated throughout a 24-hour day. In contrast, circadian rhythms complete one cycle daily, while infradian rhythms such as the human menstrual cycle have periods longer than a day. The Oxford English Dictionary's definition of Ultradian specifies that it refers to cycles with a period shorter than a day but longer than an hour.[1]
Leptin circadian cycle, interfered by three meals. One can see that leptin goes high during the day, then it falls off, before starting the cycle again. The line is a fitted curve to the experimental data, using polynomial expansion, in order to show the periodic behavior of the data
The descriptive term ultradian is used in sleep research in reference to the 90–120 minute cycling of the sleep stages during human sleep.[2]
There is a circasemidian rhythm in body temperature and cognitive function which is technically ultradian. However, this appears to be the first harmonic of the circadian rhythm of each and not an endogenous rhythm with its own rhythm generator.
Other ultradian rhythms include blood circulation, blinking, pulse, hormonal secretions such as growth hormone,[3]heart rate, thermoregulation, micturition, bowel activity, nostril dilation, appetite, and arousal. Ultradian rhythms of appetite require antiphasic release of neuropeptide Y (NPY) and corticotropin-releasing hormone (CRH), stimulating and inhibiting appetite ultradian rhythms.[4] Recently, ultradian rhythms of arousal lasting approximately 4 hours were attributed to the dopaminergic system in mammals.[5] When the dopaminergic system is perturbed either by use of drugs or by genetic disruption, these 4-hour rhythms can lengthen significantly into the infradian (> 24 h) range, sometimes even lasting for days (> 110 h) when methamphetamines are provided.[6]
Ultradian mood states in bipolar disorder cycle much faster than rapid cycling; the latter is defined as four or more mood episodes in one year, sometimes occurring within a few weeks. Ultradian mood cycling is characterized by cycles shorter than 24 hours.[7]
^"Ultradian, adj". Oxford English Dictionary. Retrieved 18 February 2014. available online to subscribers, also in print
^Hobson JA, Pace-Schott EF (September 2002). "The cognitive neuroscience of sleep: neuronal systems, consciousness and learning". Nat. Rev. Neurosci. 3 (9): 679–93. doi:10.1038/nrn915. PMID 12209117. S2CID 205512148.
^Tannenbaum, Gloria S. (1976). "Evidence for an endogenous ultradian rhythm governing growth hormone secretion in the rat". Endocrinology. 98 (3): 562–570. doi:10.1210/endo-98-3-562. PMID 1261487.
^Kalra, S.P.; Kalra, P.S. (2004). "NPY and cohorts in regulating appetite, obesity and metabolic syndrome: beneficial effects of gene therapy". Neuropeptides. 38 (4): 201–211. doi:10.1016/j.npep.2004.06.003. PMID 15337372. S2CID 30017869.
^Kramlinger KG, Post RM (March 1996). "Ultra-rapid and ultradian cycling in bipolar affective illness". Br J Psychiatry. 168 (3): 314–23. doi:10.1192/bjp.168.3.314. PMID 8833685. S2CID 25978680.
December 15, 2023
ultradian, rhythm, look, ultradian, wiktionary, free, dictionary, chronobiology, ultradian, rhythm, recurrent, period, cycle, repeated, throughout, hour, contrast, circadian, rhythms, complete, cycle, daily, while, infradian, rhythms, such, human, menstrual, c. Look up ultradian in Wiktionary the free dictionary In chronobiology an ultradian rhythm is a recurrent period or cycle repeated throughout a 24 hour day In contrast circadian rhythms complete one cycle daily while infradian rhythms such as the human menstrual cycle have periods longer than a day The Oxford English Dictionary s definition of Ultradian specifies that it refers to cycles with a period shorter than a day but longer than an hour 1 Leptin circadian cycle interfered by three meals One can see that leptin goes high during the day then it falls off before starting the cycle again The line is a fitted curve to the experimental data using polynomial expansion in order to show the periodic behavior of the dataThe descriptive term ultradian is used in sleep research in reference to the 90 120 minute cycling of the sleep stages during human sleep 2 There is a circasemidian rhythm in body temperature and cognitive function which is technically ultradian However this appears to be the first harmonic of the circadian rhythm of each and not an endogenous rhythm with its own rhythm generator Other ultradian rhythms include blood circulation blinking pulse hormonal secretions such as growth hormone 3 heart rate thermoregulation micturition bowel activity nostril dilation appetite and arousal Ultradian rhythms of appetite require antiphasic release of neuropeptide Y NPY and corticotropin releasing hormone CRH stimulating and inhibiting appetite ultradian rhythms 4 Recently ultradian rhythms of arousal lasting approximately 4 hours were attributed to the dopaminergic system in mammals 5 When the dopaminergic system is perturbed either by use of drugs or by genetic disruption these 4 hour rhythms can lengthen significantly into the infradian gt 24 h range sometimes even lasting for days gt 110 h when methamphetamines are provided 6 Ultradian mood states in bipolar disorder cycle much faster than rapid cycling the latter is defined as four or more mood episodes in one year sometimes occurring within a few weeks Ultradian mood cycling is characterized by cycles shorter than 24 hours 7 See also editCircadian RhythmReferences edit Ultradian adj Oxford English Dictionary Retrieved 18 February 2014 available online to subscribers also in print Hobson JA Pace Schott EF September 2002 The cognitive neuroscience of sleep neuronal systems consciousness and learning Nat Rev Neurosci 3 9 679 93 doi 10 1038 nrn915 PMID 12209117 S2CID 205512148 Tannenbaum Gloria S 1976 Evidence for an endogenous ultradian rhythm governing growth hormone secretion in the rat Endocrinology 98 3 562 570 doi 10 1210 endo 98 3 562 PMID 1261487 Kalra S P Kalra P S 2004 NPY and cohorts in regulating appetite obesity and metabolic syndrome beneficial effects of gene therapy Neuropeptides 38 4 201 211 doi 10 1016 j npep 2004 06 003 PMID 15337372 S2CID 30017869 Blum I D Zhu L Moquin L Kokoeva M V Gratton A Giros B Storch K F 2014 A highly tunable dopaminergic oscillator generates ultradian rhythms of behavioral arousal eLife 3 doi 10 7554 eLife 05105 PMC 4337656 PMID 25546305 Blum I D Zhu L Moquin L Kokoeva M V Gratton A Giros B Storch K F 2014 A highly tunable dopaminergic oscillator generates ultradian rhythms of behavioral arousal eLife 3 doi 10 7554 eLife 05105 PMC 4337656 PMID 25546305 Kramlinger KG Post RM March 1996 Ultra rapid and ultradian cycling in bipolar affective illness Br J Psychiatry 168 3 314 23 doi 10 1192 bjp 168 3 314 PMID 8833685 S2CID 25978680 Retrieved from https en wikipedia org w index php title Ultradian rhythm amp oldid 1187261923, wikipedia, wiki, book, books, library,
