The pons is the middle of the three parts of the brainstem, sitting above the medulla and below the midbrain. It acts as a relay between the cerebellum and cerebral hemispheres. 

Gross anatomy

The pons has a bulbous shape and has two main components - the ventral pons and the dorsal tegmentum.

The ventral (or anterior) pons consists of white matter tracts (e.g. anterior and lateral corticospinal, corticobulbar and corticopontine tracts) with transverse fibres contributing to the bulk of the pons.

The dorsal tegmentum is continuous with the tegmentum of the medulla and the midbrain. It contains multiple white matter tracts (e.g. medial longitudinal fasciculus, medial lemniscus, lateral lemniscus, etc) and grey matter nuclei (e.g. cranial nerves). Within the dorsal tegmentum lie four cranial nerve nuclei:

Posteriorly, the pons is connected to the cerebellum by the middle cerebellar peduncle. 


Blood supply

Primarily by vertebrobasilar circulation:

Anatomy: Brain
Share article

Article information

rID: 5801
Synonyms or Alternate Spellings:
  • The pons

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Case 1: the pons with a left sided infarct
    Drag here to reorder.
  • Drag
    Case 2: the pons with a right sided infarct
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.