Needhelp2119 Needhelp2119
  • 13-09-2022
  • Biology
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What happens when both left and right sternocleidomastoid muscles are contracted?.

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chocdrop3209
chocdrop3209 chocdrop3209
  • 13-09-2022

This extension movement brings the head backward. A contraction of both SCM muscles can flex your neck, which brings your chin down in the direction of your breastbone. Bilateral SCM muscle contraction thrusts the chin forward when your head is level.

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