hand of a neuropathologist doctor with a neurological hammer checks the reflex on the knee joint of a child, close-up

5 age areflexia baby background beautiful body caucasian child concept deep disease doctor extensor girl health hit hyperreflexia illness kid kneejoint medicine nerve neurologist neurology neuropathist neuropathologist neuropathology old patella pathological pathology patient person physiology proprioceptive reflex therapy treatment years