Annotated image
Central sulcus
Lamination
Key findings at 24 weeks gestation. The central sulcus is now becoming visible. Normal foliation of the cerebellar vermis nicely depicted, and note visualisation of the pituitary stalk. 5 layered laminar appearance is still seen.
Ventricular zone (curved arrow); 2. periventricular fibre-rich zone (dotted arrow); 3. intermediate zone (straight long arrow); 4. sub-plate (fuzzy arrow); 5. cortex (short thick arrow)