What is the functional mobility classification for low lumbar L4-L5?

• A. Household ambulation
• B. Independent running
• C. Wheelchair for long distances
• D. Bedbound

Answer: (A)

The main idea is how far a person can walk in daily life: inside the home versus in the community. At the low lumbar level of L4–L5, the nerves that control knee extension and some ankle movement are typically preserved, so a person can walk short distances and manage basic tasks around the house, usually with assistive devices like an ankle–foot orthosis and possibly a cane or crutches. However, sustaining longer distances, navigating stairs safely, and handling the uneven challenges of outdoor environments are more demanding, so independent, long-distance community ambulation isn’t expected. That combination—able to ambulate within the home but not reliably outside the home—fits the household ambulation category. The other options imply either much greater impairment (bedbound) or the ability to go far or fast (independent running) or complete wheelchair dependence, which isn’t typical for L4–L5.