What is cerebellar flocculus?
Anatomical terms of neuroanatomy The flocculus (Latin: tuft of wool, diminutive) is a small lobe of the cerebellum at the posterior border of the middle cerebellar peduncle anterior to the biventer lobule. Like other parts of the cerebellum, the flocculus is involved in motor control.
What does Vestibulocerebellum mean?
region of the cerebellum found in the flocculonodular lobe that receives vestibular and visual information; it is involved with balance, vestibular reflexes, and eye movements.
What is Archicerebellum syndrome?
Coordination and Ataxia Lesions of the flocculonodular lobe and adjoining parts of the caudal vermis (so‐called archicerebellar or flocculonodular syndrome) mainly due to tumors or hemorrhage cause postural ataxia of head and trunk during sitting, standing, and walking. Patients frequently fall while sitting.
What is the cerebellar Nodulus?
The two flocculi are connected to the midline structure called the nodulus by thin pedicles. It is placed on the anteroinferior surface of cerebellum. This region of the cerebellum has important connections to the vestibular nuclei and uses information about head movement to influence eye movement.
Why might a neurodegenerative disease cause ataxia?
Damage, degeneration or loss of nerve cells in the part of your brain that controls muscle coordination (cerebellum), results in ataxia.
What is the function of neocerebellum?
Sometimes, the posterior lobe of cerebellum is called the neocerebellum since phylogenetically it is the newest part of the cerebellum. It plays an important role in fine motor coordination, specifically in the inhibition of involuntary movement via inhibitory neurotransmitters, especially GABA.
What is the meaning of flocculus?
Medical Definition of flocculus : a small irregular lobe on the undersurface of each hemisphere of the cerebellum that is linked with the corresponding side of the nodulus by a peduncle
What is flocculonodular lobe?
A small lobe of the cerebellum at the posterior border of the middle cerebellar peduncle anterior to the biventer lobule; it is associated with the nodulus of the vermis; together, these two structures compose the flocculonodular lobe (vestibular part) of the cerebellum.
What is the function of the cerebellar flocculus?
The cerebellar flocculus is a critical structure involved in the control of eye movements. Both static and dynamic abnormalities of the vestibulo-ocular reflex (VOR) have been described in animals with experimental lesions of the flocculus/paraflocculus complex.
Is Iris flocculus a genetic disease?
Iris flocculus is usually sporadic, however, familial variants have been described. Iris flocculus has an association with specific genes like ACTA2 and MYH11. Mutations in the ACTA2 gene have an association with iris flocculi, familial TAAD (Thoracic aortic aneurysm and dissection).