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There are four paired deep cerebellar nuclei embedded in the white matter centre of the cerebellum. The nuclei are the fastigial , globose , emboliform , and dentate nuclei. In lower mammals the emboliform nucleus appears to be continuous with the globose nucleus, and these are known together as the interposed nucleus .
English: Diagram of the cerebellar circuitry. Excitatory synapses are denoted by (+) and inhibitory synapses by (-). MF: Mossy fibers; DCN: Deep cerebellar nuclei; IO: Inferior Olive
It sends fibres to deep cerebellar nuclei (including the fastigial nucleus) which in turn project to both the cerebral cortex (via midbrain and thalamus) and the brain stem (via reticular formation in the pons, and vestibular nuclei in the medulla oblongata), thus providing modulation of descending motor systems. The spinocerebellum contains ...
In some ways it more resembles a fern and is present in both cerebellar hemispheres. [1] It brings sensory and motor information to and from the cerebellum. The arbor vitae is located deep in the cerebellum. Situated within the arbor vitae are the deep cerebellar nuclei; the dentate, globose, emboliform and the fastigial nuclei. These four ...
The eight cerebellar nuclei, located within the deep white matter of each cerebellar hemisphere, are grouped into pairs, with one of each pair in each of the two hemispheres. As a chunk of tissue, the dentate nucleus with overlying cerebellar cortex makes up a functional unit called the cerebrocerebellum .
Other contributors include the vestibular nerve and nuclei, the spinal cord, the reticular formation, and feedback from deep cerebellar nuclei. Axons enter the cerebellum via the middle and inferior cerebellar peduncles, where some branch to make contact with deep cerebellar nuclei.
These axons ascend to the pons where they join the superior cerebellar peduncle to enter the cerebellum. Once in the deep white matter of the cerebellum, the axons recross the midline, give off collaterals to the globose and emboliform nuclei, and terminate in the cortex of the anterior lobe and vermis of the posterior lobe.
Micrograph of cerebellar cortex showing Purkinje cells within the baskets formed by the processes of basket cells. Bielschowsky stain. In the cerebellum, the multipolar basket cells have branching dendrites, which are dilated and knotty. Basket cells synapse on the cell bodies of Purkinje cells and make inhibitory synapses with Purkinje cells.