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Middle layer of the cervical ...
Other Terms: Intermediate layer of ventral hypaxial muscles
The main muscle of the middle layer of the lateral cervical wall, the middle scalene, connects the costal elements of the cervical vertebrae to the first rib. It occupies a posterior position in relation to its other lateral counterpart and forms the inner boundary wall to the blood vessels and nerves of the body wall. Short intersegmental intertransversarii muscles also contribute to the internal layer of the neck wall.