Venous drainage of brain
Venous drainage of cerebral hemisphere
Superficial veins of the cerebral hemispheres
- Superior cerebral veins drain blood from the superolateral and medial surface of the cerebral hemispheres into the superior sagittal sinus.
- Superficial middle cerebral vein
- It runs along the posterior ramus and stem of lateral sulcus.
- It drains blood from superolateral surface of the cerebral hemisphere into the caveronus sinus.
- It communicates with the superior sagittal and transverse sinus through vein of Trolard and vein of Labbe respectively.
Deep veins of the cerebral hemispheres
- Internal cerebral veins: They are formed by the union of thalamostriate and choroid veins.
- Tributaries are:
- Thalamostriate vein,
- Choroid vein,
- Septal vein,
- Epithalamic vein,
- Lateral ventricular vein.
- Basal veins (two) : They are formed by the union of:
- Anterior cerebral vein
- Deep middle cerebral vein
- Striate vein
- Great cerebral vein of Galen:
- It is formed by the union of two internal cerebral veins, is 2 cm long and drains into the straight sinus. Its tributaries are:-
- Internal cerebral veins,
- Basal veins,
- Occipital veins,
- Posterior callosal vei
Venous drainage of cerebellum
- Superior cerebellar veins, drain into the great cerebral vein.
- Inferior cerebellar veins, drain into adjacent venous sinuses.
Venous drainage of Brainstem
Midbrain: It is drained by basal and great cerebral veins.
Pons: These veins terminate into basal, transverse, and petrosal sinuses.
Medulla: These veins drain into basilar plexus of veins and inferior petrosal sinus.