What cranial nuclei are 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).
How many nuclei are in cranial nerves?
The sixteen cranial nerve nuclei can be most easily remembered if they are assembled into functional groups and anatomical location (Table A3—from Purves et al., Neuroscience, 6th Ed.; Figure 4.2).
What are the cranial nerve nuclei?
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. Some nuclei are small and contribute to a single cranial nerve, such as some of th motor nuclei.
What is the nuclei of a nerve?
The Nucleus of a neuron is an oval shaped membrane-bound structure found in the soma or body of the neuron. It contains the nucleolus and chromosomes, necessary for the coded production of proteins within the cell.
What are cranial nerve nuclei?
What are the nuclei of nerves?
In neuroanatomy, a nucleus (plural form: nuclei) is a cluster of neurons in the central nervous system, located deep within the cerebral hemispheres and brainstem. Nuclei are connected to other nuclei by tracts, the bundles (fascicles) of axons (nerve fibers) extending from the cell bodies.
What cranial nerve nuclei are in the medulla?
The nuclei of cranial nerves XII, X, IX, and part of VIII are located in the medulla, and the motor neurons of nerve XI are found in the cervical spinal cord. Part of the trigeminal complex, the spinal trigeminal tract and nucleus, is also found in the lateral medulla adjacent to the anterolateral system.
What are nuclei and ganglia?
Clusters of cell bodies in the central nervous system are called nuclei, while the cell bodies lining the nerves in the peripheral nervous system are called ganglia.
What is the difference between a nuclei and a ganglia?
Which cranial nerves are unilaterally innervated?
Unilaterally affected cranial nerves III, IV, V, and VI may indicate a cavernous sinuous lesion. Unilaterally affected cranial nerves IX, X, and XI may indicate a jugular foramen syndrome. Bilaterally affected cranial nerves X, XI, and XII may indicate bulbar or pseudobulbar palsy.