Sensory (failure to transmit proprioception) versus motor (cerebellar)<unk> 
Romberg test
Comparison of posture stability when eyes are open versus eyes closed
If<unk>  worsens with loss of visual input suggestive of sensory<unk> 
If<unk>  does not significantly change with eyes closed suggests motor<unk> 
Finger-to-nose, heel-to-shin, rapid alternating movements
If abnormal with eyes open, suggests motor<unk> 
If abnormal with eyes closed, suggests sensory<unk> 
Systemic versus isolated nervous system disease
CNS versus PNS
Romberg test
Comparison of posture stability when eyes are open versus eyes closed
If<unk>  worsens with loss of visual input suggestive of sensory<unk> 
If<unk>  does not significantly change with eyes closed suggests motor<unk> 
Finger-to-nose, heel-to-shin, rapid alternating movements
If abnormal with eyes open, suggests motor<unk> 
If abnormal with eyes closed, suggests sensory<unk> 
Comparison of posture stability when eyes are open versus eyes closed
If<unk>  worsens with loss of visual input suggestive of sensory<unk> 
If<unk>  does not significantly change with eyes closed suggests motor<unk> 
If abnormal with eyes open, suggests motor<unk> 
If abnormal with eyes closed, suggests sensory<unk>
Ataxia
Systemic conditions
Dysphonia
Intoxications with diminished alertness
Dysphagia
Ethanol
Diplopia
Sedative/hypnotic toxicity