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Fungsi Sternocleidomastoid, Asal & Anatomi


Itu otot sternokleidomastoid melenturkan leher dan membantu dengan gerakan kepala. Juga, otot bekerja dengan otot-otot skalen di leher selama inspirasi paksa saat bernapas (menghirup), dan itu mengangkat tulang dada, tulang di bagian depan tulang rusuk.

Otot berasal dari bagian tengah tulang selangka. Ini memasukkan ke dalam proses mastoid tulang temporal di dekat telinga dan pangkal tengkorak, dan itu meregangkan seluruh panjang leher. Otot ini membantu leher untuk berputar ke samping, melenturkan ke samping, dan membungkuk ke depan.

Dua saraf melayani otot sternokleidomastoid. Untuk fungsi motorik (gerakan), otot menggunakan saraf aksesori. Saraf pleksus serviks menyediakan fungsi sensorik, yang mencakup propriosepsi – perasaan yang kita miliki tentang posisi dan gerakan tubuh kita dalam ruang di sekitar kita. Fungsi ini hanya berlaku untuk kerja tubuh bagian dalam. Untuk otot ini, proprioception melibatkan kesadaran akan rasa sakit dan mengirimkan sinyal ke otak.

Dua arteri melayani sternokleidomastoid. Darah beroksigen tiba di otot melalui arteri oksipital di kepala dan arteri tiroid superior di leher.



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