Where is the fastigial nucleus?
The fastigial nucleus constitutes one of the primary cerebellar nuclei and is situated closest to the midline toward the anterior segment of the superior vermis and over the roof of the fourth ventricle.
What does the pontine nucleus do?
The pontine nuclei (PN) are the largest of the precerebellar nuclei, neuronal assemblies in the hindbrain providing principal input to the cerebellum. The PN are predominantly innervated by the cerebral cortex and project as mossy fibers to the cerebellar hemispheres.
Where is the dentate nucleus located?
cerebellar
The dentate nucleus is the largest and most lateral of the cerebellar nuclei, located medially within each cerebellar hemisphere, just posterolateral to the fourth ventricle 1.
What are cerebellar nuclei?
The deep cerebellar nuclei (DCN) are the sole output channel of the cerebellum and form part of the cerebellar system of closed loops connected to the sensorimotor region, the associative cortices, and the limbic system.
What is the function of the Folia?
A simple explanation for the evolutionary introduction of folia to the Cb is that it was a means to increase the surface area and thereby accommodate an increase in cell number, which in turn facilitated the acquisition of more complex functional circuits [3].
What is Juxtarestiform?
The juxtarestiform body carries both afferent and efferent fibers connecting the vestibular nuclei and the flocculonodular lobe and fastigial nucleus of the cerebellum. The juxtarestiform body coordinates balance and eye movements by communication between the vestibular apparatus and the cerebellum.
What do the transverse pontine Fibres connect?
Ascending, descending, and transverse pontine fibers—other parts of the CNS are interconnected via longitudinal tracts; middle cerebellar peduncles of the cerebellum are connected to the transverse pontine fibers; they cross the anterior pons surface, and are axons linking the pontine nuclei with the cerebellum of the …
What happens if dentate nucleus is damaged?
Efferent fibers of the dentate nucleus are involved in the modulation of motor neurons and neurons involved in conscious thought and visuospatial function. Disruption of the dentate nucleus is typically associated with cerebellar ataxia.
What causes dentate?
Dentate may be involved [Figure 9]. Metronidazole toxicity is a known cause of abnormal T2 hyperintense signal change in dentate nuclei. This toxicity generally presents with dysarthria, ataxia, and visual blurring. Cumulative dose of 25–90 g administered over a period of 1–3 months is implicated.
What are the 4 cerebellar nuclei?
From lateral to medial, the four deep cerebellar nuclei are the dentate, emboliform, globose, and fastigii. Some animals, including humans, do not have distinct emboliform and globose nuclei, instead having a single, fused interposed nucleus.