The grey matter is located centrally in the spinal cord, forming a butterfly shape when viewed in cross section.4
References:
1. Hedges V. Spinal cord structure. In: Introduction to Neuroscience. Available at: https://openbooks.lib.msu.edu/introneuroscience1/. Accessed December 2025.
2. Mercadante AA, Tadi P. Neuroanatomy, gray matter. [Updated 2023 Jul]. In: StatPearls [internet]. Treasure Island (FL): StatPearls Publishing; 2023. Available at: https://www.ncbi.nlm.nih.gov/books/NBK553239/.
3. Spinal cord. In: Lumen Learning Anatomy. https://courses.lumenlearning.com/suny-dutchess-anatomy-physiology/chapter/spinal-cord/. Accessed December 2025.
4. Siebert JR, Kennedy K, Osterhout DJ. Neurons are not all the same: diversity in neuronal populations and their intrinsic responses to spinal cord injury. ASN Neuro 2025; 17 (1): 2440299.