dorsal aspect Medulla oblongata ▣Lower portion Gracile tubercle produced by underlying gracile nucleus Cuneate tubercle produced by underlying cuneate nucleus Inferior cerebellar peduncle Upper portion:forms the lower half of rhomboid fossa dorsal aspect  Lower portion – Gracile tubercle produced by underlying gracile nucleus – Cuneate tubercle produced by underlying cuneate nucleus – Inferior cerebellar peduncle  Upper portion: forms the lower half of rhomboid fossa Medulla oblongata