Surgical and imagenological anatomy of the intraparietal surface and its application to the advocacy of the ventricular atry.

Solapas principales

Martínez F. 1,2 , Salle F. 2, Jaume A. 3, Spagnuolo E. 3



             The pathological processes of the ventricular atrium are a challenge for the neurosurgeon, due to the eloquent areas and tracts of white matter in relation to it. A possible site of approach to the atrium is the intraparietal sulcus (SIP).

Twenty cerebral hemispheres of adult cadavers were studied: 1) morphology, trajectory and length of the intraparietal groove, 2) distance from the SIP to the upper border of the hemisphere, 3) presence of supernumerary grooves, 4 ) Relationship of the SIP with the ventricular atrium. The 3 planes of space were cut in 5 hemispheres to correlate with magnetic resonance imaging (MRI).

The SIP was continuous in 14 cases, the Jensen sulcus was identified in 15 cases. The distance from the SIP to the upper border of the hemisphere was between 22 and 46 mm (average 32 mm) in the anterior sector and between 10 and 30 mm in the posterior sector (average 26 mm). In the image correlation we observe that in the horizontal cuts high, the SIP can be recognized because it cuts "in T" to the postcentral groove. In parasagittal cuts you can see the groove of Jensen. A cortical dieresis in the depth of the SIP and in its union with the post-central sulcus leads to the ventricular atrium.


Key Words: Surgical and imagenological anatomy, intraparietal surface, the advocacy of the ventricular atry.


  1. Departamento de Anatomía, Facultad de Medicina CLAEH, Maldonado, Uruguay.
  2. Servicio de Neurocirugía del Hospital de Clínicas “Dr. Manuel Quintela”. Universidad de la República, Montevideo, Uruguay.
  3. Laboratorio de Microcirugía, Hospital Maciel. ASSE, Montevideo, Uruguay