Neurosurgery notes/Anatomy/Vascular/Veins/Infratentorial veins

Infratentorial veins

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  • The superior vermian veins drain the tentorial part of the vermis.
    • The tributary of the superior vermian vein draining the tentorial surface of the culmen has been called the supraculminate vein.
  • The veins converging on the tentorium join to form tentorial sinuses that drain into the straight, lateral, and superior petrosal sinuses and the torcula.
  • The veins on the superior part of the tentorial surface of the vermis ascend toward the superior vermian vein and those on the inferior part of the tentorial surface of the vermis descend toward the torcula.
  • The superior hemispheric veins are divided into three groups:
    • Anterior “Galenic” (green) group that drains toward the vein of Galen;
    • Posterior “Tentorial” (brown) group that drains into the veins converging on the straight sinus, torcula, and medial part of the lateral sinus
    • Lateral “Petrosal” (blue) group that drains into the superior petrosal sinus, the anterolateral marginal vein, and the lateral part of the lateral sinus.
Tentorial surface, superior view. The tentorium has been removed except in the area of the tentorial sinuses.
Tentorial surface, superior view. The tentorium has been removed except in the area of the tentorial sinuses.
  • The superior petrosal sinus passes along the petrous ridge and joins the junction of the lateral (referred to here as the transverse sinus) and sigmoid sinuses posteriorly and the cavernous sinus anteriorly.
  • The inferior hemispheric veins drain the hemispheric part of the suboccipital surface, and the inferior vermian veins drain the vermian part of the suboccipital.
  • The superior petrosal veins are divided into medial, intermediate, and lateral groups, depending on whether they enter the middle, intermediate, or lateral third of the superior petrosal sinus.
  • The emissary vein passing through the condylar foramen joins the sigmoid sinus.
Suboccipital surface, posterior view. The right tonsil and the medial part of the biventral lobule have been removed to expose the structures on the ventral wall of the cerebellomedullary fissure.
Suboccipital surface, posterior view. The right tonsil and the medial part of the biventral lobule have been removed to expose the structures on the ventral wall of the cerebellomedullary fissure.
 
Petrosal surface and left side of the brainstem, anterolateral view
Petrosal surface and left side of the brainstem, anterolateral view
  • The right cerebellar hemisphere and the part of the left cerebellar hemisphere posterior to the dentate nucleus and tonsil have been removed to show the roof of the fourth ventricle and the cerebellomesencephalic and cerebellomedullary fissures
 
Deep cerebellum and fourth ventricle, posterior view
Deep cerebellum and fourth ventricle, posterior view
  • The inferior sagittal sinus joins the straight sinus at the apex of the tentorium.
  • The superior sagittal sinus joins the straight sinus at the torcula.
  • The declival vein drains the declive and joins the inferior vermian vein or the torcula.
  • The marginal sinus courses in the dura at the level of the foramen magnum above the rostral attachment of the dentate ligament.
Midsagittal section of cerebellum and fourth ventricle, left lateral view. The left half of the cerebellum has been removed to expose the fourth ventricle.
Midsagittal section of cerebellum and fourth ventricle, left lateral view. The left half of the cerebellum has been removed to expose the fourth ventricle.
  • The part of the tentorium between the temporal lobe and the cerebellum has been preserved.
Brainstem, anterior view
Brainstem, anterior view

Abbreviation

Abbreviation
Full Form
Abbreviation
Full Form
Abbreviation
Full Form
A.
Artery
Int.
Internal
Quad.
Quadrigeminal
A.I.C.A.
Anteroinferior cerebellar artery
Interped.
Interpeduncular
Retrot.
Retrotonsillar
Ant.
Anterior
Jug.
Jugular
Sag.
Sagittal
Atr.
Atrial
Lat.
Lateral
S.C.A.
Superior cerebellar artery
Bas.
Basilar
Lig.
Ligament
Seg.
Segment
Bivent.
Biventral
Marg.
Marginal
Sig.
Sigmoid
Br.
Bridging
Med.
Medial, medullary
Str.
Straight
Carotid
Carotid
Mes.
Mesencephalic
Sulc.
Sulcus
Cav.
Cavernous
Mid.
Middle
Sup.
Superior
Cer.
Cerebellar, cerebellum
N.
Nerve
Supracol.
Supracolliculate
Cer. Med
Cerebellomedullary
Occip.
Occipital
Supraton.
Supratonsillar
Cer. Mes.
Cerebellomesencephalic
Olf.
Olfactory
Temp.
Temporal
Cer. Pon.
Cerebellopontine
P.C.A.
Posterior cerebral artery
Tent.
Tentorial
Ch.
Choroidal
Ped.
Peduncle
Ton.
Tonsillar
Cist.
Cistern
Pet.
Petrosal
Trans.
Transverse
CN
Cranial nerve
P.I.C.A.
Posteroinferior cerebellar artery
Trig.
Trigeminal
Comm.
Communicating
Pon.
Pontine, ponto
V.
Vein
Condylar
Condylar
Pon. Med.
Pontomedullary
Ve.
Vermian
Em.
Emissary
Pon. Mes.
Pontomesencephalic
Vel.
Velum
Fiss.
Fissure
Pon. Trig.
Pontotrigeminal
Vent.
Ventricle
Hem.
Hemispheric
Post.
Posterior
Vert.
Vertebral
Inf.
Inferior
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