Fibers Cortico-Nuclear

Corticonuclear fibers (pna) are a group of nerve fibers that connect the cerebral cortex (cortex) with the nuclei of cranial nerves, such as the facial (nervus facialis), sublingual (nervus hypoglossus) and glossopharyngeus (nervus glossopharyngeus). These fibers are also known as corticobulbar fibers (bna), corticonuclear tract (jna) or corticonuclear fibers (corticonucleus tract (pna).

Fibers of the corticonuclear tract provide the transmission of sensory information from the cerebral cortex to the nuclei of the cranial nerves and back. This allows you to coordinately control the movements of the muscles of the face, tongue and pharynx.

Under normal conditions, these fibers serve to transmit information between the cerebral cortex and the nuclei of the cranial nerves. However, in some cases, these fibers may become damaged or disrupted due to various reasons such as injury, infection, tumors or other diseases. In such cases, the transmission of information between the cortex and the nuclei may be disrupted, which can lead to various neurological symptoms such as speech, sensory and motor disorders.

A variety of techniques are used to diagnose and treat damage to corticonuclear tract fibers, including neurophysiological studies, magnetic resonance imaging (MRI), and other imaging modalities. Depending on the severity of the injury, treatment may include medication, physical therapy, and surgery.

Thus, corticonuclear fibers play an important role in transmitting information between the cerebral cortex and cranial nerves. Abnormalities in these fibers can lead to various neurological disorders, and timely diagnosis and treatment can help improve patients' quality of life.

Corticonuclear fibers (corticonuclear tract, phrenotympanic tract) are one of the evolutionarily older tracts of the human extrapyramidal system. It is a collection of nuclei of the reticular formation and gray matter of the brain stem: reticular cells disinhibit mainly the bundles of gamma and, less commonly, delta axons of inspiratory neurons of the lateral geniculate nucleus (nucleus of the third ventricle). These neurons, through the corticothalamic tract, are sent to the ipsilateral neurons of the spinal cord olives, which send axons upward, parallel to the ascending part of the spinal cord and medulla oblongata as part of the musculocutaneous nerve, and through the curved chiasm of the iris they return excitation along the descending cells of the anterior sensory tract and the spinal lining. ganglion on the skin.