Musculus scalenus ventralis
The ventral component of the scalene muscles, assisting in rib elevation during inspiration and lateral neck flexion. Located deep in the ventrolateral neck.
Origin: Transverse processes of lower cervical vertebrae
Insertion: Ventral surface of the first rib
Action: Elevates the first rib; assists inspiration; lateral flexion of the neck
Innervation: Ventral branches of lower cervical spinal nerves (C6-C7)
Tension in the scalene muscles can compress the brachial plexus and vessels passing through the thoracic inlet.
Tension in the scalene muscles can compress the brachial plexus and vessels passing through the thoracic inlet. Signs include: Forelimb coldness or swelling; subtle forelimb lameness; sensitivity at the base of the neck; may be seen with poorly fitting breast collars or harnesses.
See the Ventral Scalene on our interactive 3D horse model. Open 3D Model