Non-standard intracranial connections and alternative pathways between dural venous sinuses and cerebral veins in the rat.

摘要: The aim of this study was to describe the uncommon intracranial venous connections and vein structures that may play a role in redirection cerebral blood drainage. carried out on 35 adult Wistar rats. Corrosion casts were prepared from system Spofacryl® used as casting medium. highest prevalence non-standard variations noted region sinus petrosus dorsalis (SPD) (31.2 %) v. cerebri magna (VCM) (28.5 %). SPD established anastomosis with ventralis 8.6 % cases, interperiopticus 2.8 sigmoideus 5.7 cases confluens sinuum (CS) where higher observed left side brain. In 11.4 VCM formed secondary connection between CS rectus leading formation loop. similar manner, entered transversus while merged an unusual among dorsal ventral systems sinuses. Several sinuses inconsistent, including occipitalis (14.3 %), intercavernosus rostralis (22.8 interbasilaris hypoplastic posterior anterior anastomotic did not reach one another 20 cases. Anatomical information concerning different drainage pathways are important preoperative planning can provide necessary understanding experimental studies, occlusion, infarction, or experimentally induced obstruction.