posterior commissure

Introduction

A thin band of white matter, crossing the midline of the brain beneath the habenular commissure & above the cerebral aqueduct.

It consists largely of fibers interconnecting the right & left pretectal region & related cell groups in the midbrain.

Dorsally, it marks the junction of the diencephalon & mesencephalon.

More general terms

• brain structure

Additional terms

• diencephalon
• habenular commissure
• mesencephalon (midbrain)
• tectum mesencephali; corpora quadrigemina