Lab 4 - External and Internal Anatomy of the Spinal Cord

External Landmarks - Cross Sectional Diagram


The diagram shows the external landmarks of the spinal cord at low thoracic levels. Locate the following longitudinal fissures and sulci, which divide the spinal cord: 

  • anterior median fissure
  • posterior median sulcus
  • posterolateral sulcus
  • posterior intermediate sulcus
  • anterolateral sulcus

  • Note that the posterior intermediate sulcus is present only above level T6.