The Application dimension of the Intraoperative Neuromonitoring (IONM) Devices market delineates usage across distinct surgical specialties, each driving a measurable share of total revenue. Spinal surgery accounts for the largest portion, roughly 45%, owing to the high incidence of corrective procedures and the critical need to protect the spinal cord and nerve roots. Cranial surgery follows with about 30%, reflecting extensive adoption in tumor resections, aneurysm clipping, and functional neurosurgery where real‑time cortical mapping mitigates neurologic deficits. Peripheral nerve surgery contributes near 12%, supporting procedures such as brachial plexus repair where motor‑evoked potentials guide nerve integrity. Vascular surgery represents roughly 8%, primarily in carotid endarterectomy and aortic interventions where somatosensory evoked potentials monitor spinal cord perfusion. The remaining 5% comprises miscellaneous applications (e.g., orthopedic limb salvage, pediatric corrective surgeries). Collectively, these application segments define the market’s topology, with each sub‑segment’s share directly proportional to procedure volume, reimbursement landscape, and clinical adoption of IONM technology, forming the backbone of the overall market size.