The spinal cord appears throughout the depth-psychology corpus not as a mere anatomical landmark but as the foundational relay structure through which bodily states are translated into the psychologically significant signals of feeling, pain, temperature, and homeostatic regulation. Craig’s sustained neuroanatomical programme dominates the treatment: the spinal cord’s lamina I neurons, dorsal horn architecture, and spinothalamic pathways are shown to be the first central station at which small-diameter interoceptive fibers are sorted from exteroceptive ones, establishing the embryological and functional distinction between visceral and somatic sensation that ultimately grounds subjective feeling in neural reality. Kandel situates the spinal cord more classically, as the seat of reflex behaviour and the upward-extending foundation of the central nervous system, through which sensory inputs are transformed into coordinated motor commands. Fogel engages the spinal cord from the clinical phenomenology of embodied self-awareness, noting that proprioceptive and interoceptive fibers converge in the cord before ascending to common brainstem and cortical targets. Damasio references it architecturally, as the segmental entry point for organismic signals travelling bottom-to-top toward consciousness-generating brain regions. The central tension in the corpus runs between the spinal cord as reflex machine — Sherrington’s legacy as transmitted through Kandel — and the spinal cord as the origin point of the interoceptive, homeostatic, and ultimately feeling self, as Craig argues.