Thermoesthesia-and-algesthesia disorders have been registered in the dermatomes 
of cauda equina roots of patients with lumbar spine osteochondrosis in all the 
cases. Negative changes in the sensitivity of this type are manifested 
themselves as follows: 1) 2-8-degree increases of thresholds; 2) 3-6-degree 
decreases of thresholds; 3) absence of thermal sense. In the presence of reflex 
syndromes (lumbalgia and lumbar ischialgia) the disorders in L4, L5, S1 
dermatomes have been determined to the greatest degree. 
Thermoesthesia-and-algesthesia disorders are more pronounced in patients with 
the radicular syndrome than in those with the reflex syndromes. The most 
improvement ofthermoesthesia-and-algesthesia values is observed in L5 dermatome 
of patients with lumbalgia and lumbar ischialgia after complex conservative 
therapy. The treatment performed does not result in significant 
thermoesthesia-and-algesthesia improvement for the limb with radiculopathy 
events and in the dermatome of the root compressed in patients with the 
radicular syndrome. Positive changes in contralateral limb are more pronounced.