Brainsteam
Medulla ( bulbus) Surface Located in posterior cranial fossa against clivus . In front it conncets with pons and middle cerebellar peduncle. Medulla is conus shaped and is 2.5cm long with base directed towards pons. Bulbus has ventral and dorsal surface: Ventral surface contains: Ventral median fissure - fissura mediana anterior - continuation with spinal cords fissura mediana anterior . Anterolateral sulcus -sulcus anterolateralis dexter et sinister. From this groove comes out XII nerve ( n.hypoglossus) . Posterolateral sulcus -sulcus posterolateralis dexter et sinister. From this groove comes out IX nerve ( n.glossopharyngeus), X nerve (n.vagus) and XI nerve (n.accesorius) . Raised area- pyramis between fissura mediana anterior and sulcus anterolateralis Raised area- oliva between sulcus anterolateralis and sulcus posterolateralis. Dorsal surface contains: Dorsal median sulcus - sulcus medianus posterior.
