dorsal surface of the brain stem 脑干背面 Medulla oblongata Gracile tubercle薄束结节 overlying gracile nucleus Cuneate tubercle楔束结节: overlying cuneate nucleus Inferior cerebellar peduncle 小脑下脚Gracile tubercle 薄束结节: overlying gracile nucleus Cuneate tubercle 楔束结节: overlying cuneate nucleus Inferior cerebellar peduncle 小脑下脚 dorsal surface of the brain stem 脑干背面 Medulla oblongata