In human anatomy, arcuate foramen, also known as ponticulus posticus (Latin for "little posterior bridge") or Kimmerle's anomaly, refers to a bony bridge on the atlas (C1 vertebra) that covers the groove for the vertebral artery.
In human anatomy, the arcuate foramen is also referred to as ponticulus posticus or Kimmerle's anomaly, and it refers to a bony structure located on the atlas that spans the opening for the vertebral artery.