Gelatinous substance of posterior horn
Substantia gelatinosa
- Latin eponym: Substantia Rolandi
- Eponym: Substance of Rolando
- Related terms: Spinal lamina II; Gelatinous substance; Spinal lamina II
Definition
Substantia gelatinosa nucleus (a.k.a. gelatinous substance of posterior horn) is a distinct nucleus which lies in Rexed lamina II. It caps the head of the posterior horn. Some consider gelatinous substance of posterior horn (lamina II) to be a part of the head itself. The nucleus extends vertically throughout the length of the posterior horn of spinal cord. Gelatinous substance of posterior horn receives sensory information of pain and temperature from the ascending first order neurons of the lateral spinothalamic tract. From here onwards, the information is subsequently relayed inside the thalamus, prior to reaching the primary sensory cortex.
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
Ganapathy, M.K., Reddy, V. and Tadi, P. Neuroanatomy, Spinal Cord Morphology. [Updated 2021 Oct 30]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK545206/
