MRI, performed on day two of life, was consistent with partial vermian
agenesis and showed hypogenesis of inferior cerebellar vermis with mild fourth ventricular enlargement which communicated with a retrocerebellar cerebrospinal fluid collection (Figure 1(b)).
(c) Left internal carotid injection in late arterial phase showing a PTA that supplies the anterior inferior cerebellar arteries (AICA) and inferior vermian
(arrow) and hemispheric (arrowhead) branches of posterior inferior cerebellar arteries (PICA).
As we mentioned above, lexical deficiencies have been shown in vermian
The lack of peduncular decussation often results in a superior vermian
Brain MRI examination revealed that all cases had molar tooth sign, bat-wing appearance and vermian
lipomas are rare, with the literature containing only a few such cases.
The molar tooth sign was initially identified in Joubert syndrome, named after Marie Joubert who first described it in 1968 as a rare autosomal recessive disorder characterised by the neuroradiological hallmark of the molar tooth sign caused by cerebellar vermian
3 and 4), brainstem hypoplasia and vermian
They found that skaters had larger right hemispheres of the cerebellum and vermian
lobules VI-VII (the lobes connecting the left and right parts of the cerebellum) than non-skaters.
Stage (Gest.) age Development Dorsal induction 5-6 wks Closure of neural tube Ventral induction 7-12 wks Formation of brain segments and face Migration and 12-24 wks Migration of neurons from histiogenesis periventricular germinal matrix to cortex; cortical organisation Myelination 24 wks-3 Myelination yrs Stage Anomalies Dorsal induction Anencephaly, encephalocoele, Chiari malformation, spina bifida Ventral induction Holoprosencephaly, corpus callosum agenesis, vermian
agenesis, facial abnormalities Migration and Gray matter heterotopias (e.g.
The so-called sag model postulates that haemorrhage results from altered cerebrospinal fluid hydrodynamics, causing caudal sagging of the cerebellum with stretching of cerebellar vermian