Nucleus proprius
Nucleus proprius
- Related terms: Spinal laminae III and IV; Nucleus proprius; Spinal laminae III and IV
Definition
Nucleus proprius is a distinct sensory nucleus in the posterior horn of spinal cord. It is fairly large in size with its dorsal part residing in lamina III, while the ventral part lying in lamina IV of the head of posterior horn of spinal cord. Nucleus proprius could also potentially extend into lamina V in the neck region of the posterior horn. Vertically, it extends throughout the height of the posterior horn of spinal cord. The nucleus proprius receives sensory information of vibration, proprioception and 2-point discrimination from collaterals arising from the ascending first order neurons of the dorsal column medial leminiscal pathway.
References
Text written by Muhammad A. Javaid, MD, PhD © 2022 IMAIOS.
Snell, R.S. (2010). ‘Chapter 4: The Spinal Cord and the Ascending and Descending Tracts’, in Clinical Neuroanatomy. (7th ed.) Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins, pp. 137-142.
Byrne, J.H. and Dafny, N. ‘Chapter 2: Anatomy of the Spinal Cord. [Content reviewed and revised 07 Oct 2020]. In Neuroanatomy Online, an open-access electronic laboratory for the neurosciences. McGovern Medical School at UTHealth; Accessed 2022 Oct 22. Available from: https://nba.uth.tmc.edu/neuroscience/m/s2/chapter03.html
Brown, A.G. (1982). Review article the dorsal horn of the spinal cord. Quarterly Journal of Experimental Physiology: Translation and Integration, 67(2), pp.193-212. https://doi.org/10.1113/expphysiol.1982.sp002630
