后角头
Caput cornus posterioris
- 拉丁语近义词: Caput columnae posterioris
- 相关用语: 头
定义
后角头是指脊髓后角(背角)尖端正下方的后部区域。
- 后角头主要对应Rexed第III层和第IV层。位于后角头内的主要感觉神经核包括固有核,其位于第III层和第IV层,并向颈部区域(第V层)有少量延伸。
- 第II层,通常称为胶状质,覆盖于后角头之上,有时也被视为后角头本身的组成部分。胶状质是处理来自传入(初级)神经元的痛觉和温度觉感觉信息的关键结构。
- the
后角头及其各神经核贯穿脊髓全长。胶状质负责处理痛觉和温度觉输入,而固有核则参与处理与振动觉、本体感觉及两点辨别觉相关的感觉信息。这些信息由来自背柱的上行初级神经元侧支传递。
初级神经元经背侧神经根进入脊髓节段,到达后角头。
參考資料
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/