XA5KS6

ICD-11 MMS 2026-01

Midbrain

Description

The midbrain (also known as the mesencephalon) is the most superior of the three regions of the brainstem.

Index terms

Midbrain
mesencephalon

Child codes

XA1AA8 – Cerebral peduncle

Sibling codes

XA17J6 – Medulla oblongata
XA1GA1 – Infratentorial region of brain
XA34M4 – Reticular formation
XA5097 – Pyramid
XA5KN2 – Olives
XA9CM4 – Pons

Foundation entity

Midbrain – http://id.who.int/icd/entity/698519726

Part of: XA8AT9: Brainstem › XA9738: Brain › XA3JU6: Central nervous system › X: Extension Codes