What is cerebellar vermis?

The vermis (pl: vermes) of the cerebellum is an unpaired medial structure that separates the cerebellar hemispheres. It’s anatomy broadly follows that of the cerebellar hemispheres.

What is nodule of cerebellum?

The nodule, or anterior end of the inferior vermis, abuts against the roof of the fourth ventricle, and can only be distinctly seen after the cerebellum has been separated from the medulla oblongata and pons. On either side of the nodule is a thin layer of white substance, named the posterior medullary velum.

What is peduncle of flocculus?

Anatomical Parts The peduncle of flocculus is a connecting stalk, part of which is continuous with the inferior medullary velum.

What is the function of the Vestibulocerebellum?

The vestibulocerebellum functions to maintain the stability of the head on the body. It acts on the neck muscles via the lateral VST, to maintain a steady head position despite movements of the body, and thereby maintains visual fixation on distant objects, such as when a person is running or in a moving vehicle.

Where does the flocculus connect to the cerebellum?

Many floccular projections connect to the motor nuclei involved in control of eye movement. The flocculus is contained within the flocculonodular lobe which is connected to the cerebellum. The cerebellum is the section of the brain that is essential for motor control.

What is the function of the flocculus in the eye?

The flocculus is a part of the vestibulo-ocular reflex system and is used to help stabilize gaze during head rotation about any axis of space. Neurons in both the vermis of cerebellum and flocculus transmit an eye velocity signal that correlates with smooth pursuit .

Is the cerebellum involved in the control of eye movements?

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 the flocculus an exceptional model of cerebellar disease?

In humans, lesions restricted to the flocculus are rare so they can become an exceptional model to contrast with the clinical features in experimental animals or in patients with more generalized cerebellar diseases. Here, we examined a 67-year-old patient with an acute vestibular syndrome due to an isolated infarct of the right flocculus.