Principal sensory nucleus of trigeminal nerve

The nucleus principalis trigeminal nucleus ( nucleus and pontine trigeminal ) is a paired cranial nerve nucleus of the fifth cranial nerve, the trigeminal nerve in the brainstem. He is general somatosensory and processes the epikritische sensitivity, ie, the fine tactile sensitivity, the facial region.

Location

The core area is located in the upper part of the pons, a part of the Metencephalons. There it is adjacent to two other core areas of the trigeminal nerve, the trigeminal mesencephalic nucleus and the motor nucleus of trigeminal nucleus. Also, it is adjacent to the fiber tract of his cranial nerve that runs to the outlet on the side edge of the pons, and from which it receives its afferents.

Also located adjacent to the trigeminal lemniscus be accessed through the efferent fibers of the core area to the thalamus in the diencephalon.

Function

The nucleus principalis trigeminal nucleus contains the cell bodies of neurons that receive information from those mechanoreceptors of the facial skin, which are responsible for the fine sense of touch. This information will be forwarded by pseudounipolar nerve cells of the peripheral nervous system that have their cell bodies in the trigeminal ganglion at her.

The nerve cells of the core area provide for the forwarding of the fine tactile sensations to the thalamus, where they are processed and forwarded to the dentate gyrus of the cerebrum.

Swell

• Martin Trepel: Neuroanatomy. Elsevier, Munich 2012, ISBN 978-3-437-41299-8.
• Werner Kahle, Michael Frotscher: Pocket Atlas Anatomy Volume 3: Nervous system and sensory organs. Thieme, Stuttgart 2009, ISBN 978-3-13-492210-3.
• Gerhard Aumüller et al. Duale Reihe anatomy. Thieme, Stuttgart 2010, ISBN 978-3-13-136042-7.

• Heartland
• Trigeminal
• Metencephalon