Ihe mere anyị ji Arahu Ura.

Why We Nap: Evolution, Chronobiology, and Functions of Polyphasic and Ultrashort Sleep LanguageEnglishGenreScience bookPublisherBirkhäuser, BostonPublication dateAugust 1, 1990Pages280ISBN0-8176-3462-2 (Nke siri ike)
Ihe anyị ji arahu ura : mgbanwe oge ụmụ  na ọrụ nke Polyphasic na Ultrashort Ura bụ akwụkwọ afọ 1992 nke Claudio Stampi, onye nwe naanị Chronobiological ụlọ ọrụ Nyocha dezigharịrị. "Mmadụ Ndị na-ehi ụra nke polyphasic" na-ekwukarị ya, ebe ọ bụ otu n'ime akwụkwọ ole na ole e bipụtara banyere isiokwu nke ihi ụra dị mkpirikpi n'ọnọdụ ndị siri ike ebe ụra siri ike agaghị ekwe omume.

Dị ka akwụkwọ ahụ si kwuo, n'ọnọdụ a na-enweghị ụra, nyocha na ndị ọkachamara nke ncheta nke onye na-ehi ụra polyphasic na ikike nyocha na-egosi mmụba ma e jiri ya tụnyere ụra monophasic na biphasic (ma ka na-ebelata nke 12% ma e jiri ha tụnyere ụra na-agba ọsọ n'efu). Dị ka Stampi si kwuo, ọganihu a bụ n'ihi ọdịdị evolushọn pụrụ iche iji nabata usoro ihi ụra dị otú ahụ; ọ na-eche na nke a nwere ike ịbụ n'ihi na ụra polyphasic bụ usoro kachasị mma nke ndị nna nna nke agbụrụ mmadụ ruo ọtụtụ puku afọ tupu a nabata usoro ihe omume monophasic.

Dabere na ọnụọgụ EEG nke Dr. Stampi chịkọtara n'oge nnwale ụbọchị iri ise nke ụra polyphasic ultrashort na isiokwu nnwale ma bipụta ya n'akwụkwọ ya Why We Nap, ọnụ ọgụgụ nke usoro ụra na-anọgide na-abụ otu n'oge usoro ụra polyphesic na monophasic.  Nnukwu ọdịiche bụ na ọnụọgụ nke oge ụra dị mfe na oge ụra miri emi na-ebelata ntakịrị na oge ụra na-apụtakarị n'usoro ma ọ bụ na ọ bụghị, ya bụ, ụfọdụ ụra nwere ike ịbụ nke ụra na-adịghị ngwa ngwa ebe ụra anya na-aga ngwa ngwa na-achịkwa ụra ndị ọzọ.

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