Which cranial nerves receive input from the vestibular nuclei?

Which cranial nerves receive input from the vestibular nuclei?

Four brainstem vestibular nuclei receive inputs from the vestibular portion of the VIIIth nerve (Fig. 29.2). The medial, lateral (Deiter’s), and descending (inferior) nuclei contribute to the medial and lateral vestibulospinal tracts which provide direct vestibular influence on the spinal cord.

What are the cranial nerves involved in the ascending fibers of the vestibular pathway?

Ascending fibers from the superior and medial vestibular nuclei go to the motor nuclei of the oculomotor, trochlear, and abducens cranial nerves which supply the muscles of the eyes. This pathway also mediates the vestibule-ocular reflex in which eye movements are adjusted automatically for changes in head position.

What is the effect of the cerebellum on the vestibular nuclei?

Together with the cerebellum, the vestibular system contributes substantially to the stabilisation of body posture during locomotion. The vestibulo-spinal tract emerges from the lateral vestibular nucleus in the brainstem and runs unilaterally to the spinal motoneurons of the extensor muscles (Fig.

What receives input from the vestibular nuclei?

The vestibular nuclei are important centers of integration, receiving input from the vestibular nuclei of the opposite side, as well as from the cerebellum and the visual and somatic sensory systems.

Which of the following cranial nerve nuclei is found in the midbrain?

The cranial nerve nuclei are horizontal structures spread out in the midbrain (III, IV), the pons (V, VI, VII, VIII), and the medulla (IX, X, XI, XII).

What cranial nerves are involved in the vestibulo-ocular reflex?

Connections underlying the vestibulo-ocular reflex. Projections of the vestibular nucleus to the nuclei of cranial nerves III (oculomotor) and VI (abducens).

Where is the vestibular ganglion of VIII pair of cranial nerves situated?

Since there are two functional components of the vestibulocochlear nerve, it has two groups of nuclei: the vestibular and the cochlear nuclei. They are found within the vestibular area, a space in the lateral corner of the rhomboid fossa of the brainstem. They contain the bodies of the SSA neurons.

Where is the vestibular nerve located?

the ear
Assorted References. Vestibular receptors are located in the semicircular canals of the ear, which provide input on rotatory movements (angular acceleration), and in the utricle and saccule, which generate information on linear acceleration and the influence of gravitational pull.

Where do the deep cerebellar nuclei project to?

Except for a direct projection from the vestibulocerebellum to the vestibular nuclei, the cerebellar cortex projects to the deep cerebellar nuclei, which project in turn to upper motor neurons in the cortex (via a relay in the thalamus) and spinal cord (via relays in the brainstem) (Figure 19.6 and Table 19.3).

Where are the nuclei for cranial nerves 1 and 2?

The cranial nerve nuclei are a series of bilateral grey matter motor and sensory nuclei located in the midbrain, pons and medulla that are the collections of afferent and efferent cell bodies for many of the cranial nerves.

What are cranial nerve nuclei?

A cranial nerve nucleus is a collection of neurons (gray matter) in the brain stem that is associated with one or more of the cranial nerves. Axons carrying information to and from the cranial nerves form a synapse first at these nuclei.

Which cranial nerve is the vestibulocochlear nerve?

The vestibulocochlear nerve, also known as cranial nerve eight (CN VIII), consists of the vestibular and cochlear nerves.