Cross-Section of the Spinal Cord at the T2 Level

Description

Centered on an axial cross-section of the medulla spinalis at the T2 segment, the butterfly-shaped substantia grisea forms paired dorsal and ventral horns joined at the midline by the gray commissure surrounding the canalis centralis. White matter (substantia alba) encircles this core, organized into posterior, lateral, and anterior funiculi that lie, respectively, dorsal, lateral, and ventral to the gray horns. At this upper thoracic level you expect a slender anterior horn and a distinct lateral horn (intermediolateral cell column) positioned between dorsal and ventral horns, with the anterior median fissure on the ventral midline and the posterior median sulcus dorsally. Symmetry is explicit. T2 matters because it is a transition point where long tracts are prominent and segmental autonomic outflow begins to dominate the local gray matter architecture. The intermediolateral cell column at T1 to L2 houses preganglionic sympathetic neurons, so an axial view here helps correlate lesions affecting sympathetic pathways with clinical patterns such as ipsilateral Horner syndrome when disruption occurs rostral to the T1 spinal level, or segmental autonomic deficits after lateral cord injury. This level also supports teaching of dorsal column (fasciculus cuneatus) versus anterolateral system organization, a common sticking point when localizing sensory loss in thoracic myelopathy. Use this cross-section to illustrate neuroanatomy lab content on spinal cord gray commissure anatomy, horn organization, and funicular tract layout, or to support figures in neurology and neurosurgery texts discussing Brown-Sequard syndrome, thoracic cord compression, and upper thoracic sympathectomy landmarks. It also fits radiology teaching when correlating axial MRI cord signal changes with tract-based deficits at the T2 segment. Anatomical accuracy verified by SciePro's Medical Advisory Board.