Hack's Impairment Index (HII)Loading...Speech quality and mentationNormal or baseline speech; conversive and appropriate0Imperfect speech; answers most questions appropriately+1Slurred speech; answers few questions appropriately+2Slurred speech; does not make sense+3Unintelligible speech or only moans+4Gross motor skillsCan stand and walk, and is steady0Can stand and walk, but is unsteady+1Can sit up and is steady, but cannot stand+2Can sit up, but is unsteady+3Cannot sit up+4Eye movementNo nystagmus; follows finger with eyes whole time0Minimal nystagmus; follows finger with eyes whole time+1Moderate nystagmus; only follows finger with eyes short distance+2Profound nystagmus; unable to follow finger with eyes+3Unable to participate+4Coordination with target pursuitSteady; accurate finger to target0Steady; inaccurate finger to target+1Unsteady; inaccurate barely touches target+2Grossly unsteady; misses finger to target+3Unable to participate+4Fine motor skillsTraces curve perfectly0Traces mostly inside lines+1Traces mostly outside lines+2Makes mark on paper+3Unable to participate+4Indications for UseInsights & Cautions