Covers the pons as the largest part of the brainstem, sitting between the medulla and midbrain, with its name, its connection to the cerebellum and the cranial nerve nuclei in its grey matter. It then goes through external features such as the sulci, peduncles, rhomboid fossa, facial colliculus and pontocerebellar angle, followed by the division into basilar and tegmental parts. The note ends with two cross-sections, one at the facial colliculus level and one at the trigeminal motor nucleus level, listing the nuclei and tracts visible at each.
Topic 12 of 34 in the MU Sofia syllabus for Anatomy (CNS) (Medicine, Year 2). The free AceMed note covers it in 6 sections, about 539 words (4 min of reading), with 10 flashcards.
In this note
Introduction
PONS
External Features :
Development Classification
Caudal cross-section at the level of the colliculus fasciallis :
Rostal cross section at the level of the triginimal motor nucleus :
PONS
The pons is the largest part of the brainstem , situated above the medulla and below the midbrain
Approximately 2.5 cm in the length
Its name comes from the latin word for "bridge" as it serves as a connection both cerebellar hemispheres by middle cerebellar peduncle (MCP) on each side
Its grey matter contains nuclei of the cranial nerves (V, VI , VII , VIII).
External Features :
1 Bulbopontine sulcus (sulcus bulbopontinus)
– marks the transition between the medulla oblongata and the pons
