Rehab. nurses. PLEASE HELP.

I am working on a project that has to do with divide up nursing units in a Rehab. Hospital. How do Inpatient Rehab. Hospital divide up their nursing units? For example, Acute Care Hospitals divide up their nursing units by type, like Critical Care, which includes ER, ICU, IMCU and then General Care, which includes Medical, Surgical, Telemetry, etc. and Pediatric, which includes NICU, PICU, PEDS. etc. and Womens, which includes, Women's surg., PP, L&D, etc. How do Inpatient Rehab. Hospital divide up their units or do they at all? Any help is greatly appreciated.