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The inferior cerebellar peduncle is the smallest of the three cerebellar peduncles. The upper part of the posterior district of the medulla oblongata is occupied by the inferior cerebellar peduncle, a thick rope-like strand situated between the lower part of the fourth ventricle and the roots of the glossopharyngeal and vagus nerves.
Inferior cerebellar peduncle is a thick rope-like strand that occupies the upper part of the posterior district of the medulla oblongata. The peduncles form the lateral border of the fourth ventricle , and form a distinctive diamond – the middle peduncle forming the central corners of the diamond, while the superior and inferior peduncles ...
Descending fibers of the rubro-olivary tract project from the parvocellular red nucleus to the ipsilateral inferior olivary nucleus. [1] [3] The inferior olivary nucleus projects to the contralateral cerebellum via olivocerebellar fibers. [3] The rubro-olivary fibres descend through the superior cerebellar peduncle. [1]
The juxtarestiform body is the smaller, medial subdivision of each inferior cerebellar peduncle (the other, lateral one being the restiform body). [1]: 290 The juxtarestiform body contains mostly cerebellar afferents, but also some cerebellar efferents. [1]: 290
Evaluation of the cranial MRI screening of the patient with the misdoubt of cerebrovascular disease showed results that were consistent with diffusion restriction which was thought to be acute infarct extending to inferior cerebellar peduncle with involvement of right sided posterolateral medulla oblongata.
Thanks to the number of different nuclei located within the pontine tegmentum, it is a region associated with a range of functions including sensory and motor functions (due to the cranial nuclei and fiber tracts), control of stages of sleep and levels of arousal and vigilance (due to the ascending cholinergic systems), and some aspects of respiratory control.
The inferior olivary nucleus sends its afferents via climbing fibers in the inferior cerebellar peduncle to Purkinje cells of the contralateral cerebellar cortex. The Purkinje cells send their afferents to the ipsilateral dentate nucleus .
The syndrome occurs due to occlusion of perforating branches of the basilar and anterior inferior cerebellar (AICA) arteries. [ 5 ] [ 6 ] [ 7 ] It can also be caused by an interruption to the blood supply of the anterior inferior cerebellar artery or circumferential arteries .