EEG Machines segmentation by application reflects the functional drivers of demand across clinical and scientific settings. The diagnostic segment, encompassing epilepsy, sleep‑disorder and stroke evaluation, accounts for the largest share, estimated at roughly 45 % of total revenue, because hospitals and imaging centers purchase high‑capacity systems for routine patient work‑ups. Research applications, including cognitive neuroscience, brain‑computer‑interface development and pharmaceutical trials, contribute about 30 % of the market; academic institutions and contract research organizations acquire modular, upgrade‑friendly units to support variable protocols. Therapeutic monitoring—primarily intra‑operative neuromonitoring and intensive‑care sedation assessment—represents around 15 % of sales, driven by specialized disposables and real‑time analytics. Finally, the neurorehabilitation niche, which integrates EEG feedback into motor‑recovery programs, holds an estimated 10 % share, as rehabilitation centers adopt portable or wireless devices for repeated sessions. Collectively, these application categories define the overall market size and guide manufacturers’ product‑roadmaps.