Medial ventral sacrocaudal muscle

Origin: Starting from the last sacral vertebra on the ventral surface and running from each vertebra to the next.

Insertion: Ventrolateral process of each vertebra.

Action: Flexion of the tail and occasionally, lateral movement.

Nerve: Branches of the plexus caudalis ventralis.

Variation:

In equids, the medial ventral sacrocaudal muscle is composed of short bundles ending in short tendons. It originates from the ventral surface of the bodies of the last three sacral vertebrae and the first coccygeal vertebrae. The muscle inserts via short tendons on the first eight hemal processes, sharing tendons with the lateral ventral sacrocaudal muscle.