Sensory impairment in FA

Sensory impairment in FA includes Loss of tactile (touch) sensation, which is a cardinal symptom of FA but is often detectable only through laboratory testing. Vibration sense and position sense (awareness of where the body is positioned in space) are impaired early in the disease, and perception of light touch, pain, and temperature may be affected later. Most people with FA also have reduced or absent leg reflexes, such as the knee-jerk reflex. In a small fraction of people, FA leads to hearing loss or visual impairment.