Vestibular Nuclei

by Craig Canby, PhD

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    Transmission of vestibular action potentials that are initiated at the level of the hair cells will travel to the vestibular nuclei. It’s important for you to remember that there are four pairs of these vestibular nuclei associated in the brain stem. Here, we’re looking at the superior vestibular nuclei, so on this side and this side. There are also lateral vestibular nuclei which are shown here and right over in through here. Then you have a third pair which are the inferior vestibular nuclei. That is shown here and over here. Then lastly, you have a pair of medially oriented vestibular nuclei. You see that one here and on the opposite side here. Vestibular Nuclei, as mentioned in the previous slide, are located in the brain stem. Specifically, you’ll find them located in the medulla. Those that are oriented more superiorly will be found in the pons of the brain stem. Vestibular nuclei receive two inputs. The first would be the first order of afferents from the vestibular ganglion. So when the hair cells depolarize, those would be the first type of input to consider. In addition, there’s an input from the cerebellum and specifically the flocculonodular lobe of the cerebellum will provide that cerebellar input into the vestibular nuclei. Vestibular nuclei have outputs. The first thing that’s essential here is that cranial nerve outputs from the cranial nerve nuclei. These axons are going to travel in a structure referred to as the medial longitudinal fasciculus that is labeled in through here right along this hashed line on this side. You see the medial longitudinal fasciculus along the hashed line there as well. Important cranial nerve nuclei would be the oculomotor nuclei. We see one nucleus here on this side and the other is shown here. Trochlear nerve nuclei right...

    About the Lecture

    The lecture Vestibular Nuclei by Craig Canby, PhD is from the course Auditory System and Vestibular System.

    Included Quiz Questions

    1. Medulla
    2. Midbrain
    3. Limbic system
    4. Basal ganglia
    5. Cerebellum
    1. Flocculonodular lobe
    2. Thalamus
    3. Vestibular ganglion
    4. Lateral vestibulospinal tract
    5. Medial vestibulospinal tract
    1. Eye movements
    2. Coordination of postural adjustments
    3. Walking upright
    4. Head movements
    5. Conscious proprioception
    1. Lateral vestibulospinal tract
    2. Cranial nerve nuclei
    3. Cerebellum
    4. Thalamus
    5. Medial vestibulospinal tract

    Author of lecture Vestibular Nuclei

     Craig Canby, PhD

    Craig Canby, PhD

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