Babinski sign

Decreased pain sensitivity 3) Hyperreflexia with development of a Babinski sign (upward motion of the big toe following stimulation of the sole of the foot). 

Smith RC. Relationship of periodic movement in sleep (nocturnal myoclonus) and the Babinski sign. Sleep 1985 8 239-243. 

Motor symptoms are less common, but loss of fine motor movements frequently develops for example, the dexterity required for playing a musical instrument, or doing and undoing buttons. Tremor and myoclonus are rare. Gait may become hesitant and slow, and patients may lose balance. Deep tendon reflexes in the lower extremities become brisk, and occasionally a Babinski sign or other pyramidal release sign may be observed. 

Sudden onset hemiparesis with tendon reflex asymmetry and positive Babinski sign... 

Reflexes Biceps, triceps, tendon reflexes, plantar response (Babinski sign is an upgoing toe and is abnormal), superficial cutaneous reflexes (abdominal) Stroke, spinal cord lesions, endocrine diseases (e.g., diabetes, hypothyroidism), peripheral neuropathy... 

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