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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 ...
The fibers then often cross over again within the cerebellum to end on the ipsilateral side. For this reason the tract is sometimes termed the "double-crosser." The Rostral Tract synapses at the dorsal horn lamina (intermediate gray zone) of the spinal cord and ascends ipsilaterally to the cerebellum through the inferior cerebellar peduncle
The damage to the cerebellum or the inferior cerebellar peduncle can cause ataxia. Damage to the hypothalamospinal fibers disrupts sympathetic nervous system relay and produces symptoms that are similar to the symptoms caused by Horner's syndrome – such as miosis, anhidrosis and partial ptosis. [citation needed]
A lateral pontine syndrome is a lesion which is similar to the lateral medullary syndrome, ... Middle & inferior cerebellar peduncle Ipsilateral limb and gait ataxia:
In medicine, a mass such as a cyst or polyp is said to be pedunculated if it is supported by a peduncle. [2] There are in total three types of peduncles in the cerebellum of the human brain, known as superior cerebellar peduncle, middle cerebellar peduncle, and inferior cerebellar peduncle. [3]
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]
Lesions of the superior cerebellar peduncle can also result in contralateral HOD, whereas primary lesions of the central tegmental tract cause ipsilateral HOD. [3] Lesions involving this circuit may produce palatal myoclonus , one of the few involuntary movements that do not disappear during sleep. [ 4 ]