Inson anatomiyasida chaynov mushagi(musculus massater) [help 1] chaynash mushaklaridan biridir. Faqat sutemizuvchilarda uchraydi, ayniqsa o'txo'r hayvonlarda o'simlik moddalarini chaynashini osonlashtiradi.[5] Chaynashning eng aniq mushaklari chaynov mushagidir, chunki u eng yuzaki va eng kuchlilaridan biridir.

TuzilishiTahrirlash

Chaynov mushagi qalin, biroz to'rtburchak mushak bo'lib, ikki boshdan iborat, yuzaki va chuqur.

Yuzaki boshTahrirlash

Yuzaki bosh, qanchalik katta bo'lsa, yanoq suyagining chakka o'sig'idan vayanoq ravog'ining pastki chegarasining oldingi uchdan ikki qismidan qalin,pay aponevrozdan kelib chiqadi. Uning tolalari pastki va orqa tomondan o'tib, pastki jag'ning burchagiga va pastki jag' suyagining tashqi yuzasining pastki yarmiga kiritiladi.

Chuqur boshTahrirlash

Eng chuqur boshi ancha kichikroq va tuzilishida mushaklari ko'proq. Pastki chegaraning orqa uchdan bir qismidan va yanoq ravog'ining butun medial yuzasidan kelib chiqadi. Uning tolalari pastga va oldinga o'tib , pastki jag'ning tojsimon o'sig'i kabi yuqori shoxning yuqori yarmiga kiritiladi. Mushakning chuqur boshi qisman, old tomondan, yuzaki qism bilan yashiringan. Orqa tomonda quloqoldi so'lak bezi bilan qoplangan.

FunksiyaTahrirlash

Butun mushakning ikki tomonlama qisqarishi paytida mushakning harakati pastki jagni ko'tarib, pastki jag'ni ko'tarishdan iborat. Psstki jag'ning ko'tarilishi jag'larning yopilishi paytida sodir bo'ladi. Chaynov mushagi medial qanotsimon mushak bilan parallel, lekin u kuchliroq.


Qo'shimcha rasmlarTahrirlash

Shuningdek qarangTahrirlash

  • Yanoq-chaynov tizimi

ManbaTahrirlash

  1. Elsevier, Dorland's Illustrated Medical Dictionary, Elsevier, archived from the original on 2014-01-11, https://web.archive.org/web/20140111192614/http://dorlands.com/, qaraldi: 2022-06-10. Chaynov mushagi]]
  2. Merriam-Webster, Merriam-Webster's Medical Dictionary, Merriam-Webster, http://unabridged.merriam-webster.com/medical/. 
  3. Houghton Mifflin Harcourt, The American Heritage Dictionary of the English Language, Houghton Mifflin Harcourt, https://ahdictionary.com/, qaraldi: 2015-09-27. Chaynov mushagi]]
  4. Wolters Kluwer, Stedman's Medical Dictionary, Wolters Kluwer, http://stedmansonline.com/. 
  5. Romer, Alfred Sherwood. The Vertebrate Body. Philadelphia, PA: Holt-Saunders International, 1977 — 283 bet. ISBN 0-03-910284-X. 


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