[Changes of sensory threshold of nerve fibres in polyneuropathies]

Subjective and objective sensory threshold (Ts, T(ap)) was measured in the sensory fibres of the median and the sural nerves of patients with diabetic neuropathy, Guillain-Barre-Strohl syndrome, hereditary motor and sensory neuropathy (HMSN I and II) as well as in the carpal tunnel syndrome (CNS). A very marked increase of the Ts was found in HMSN I in both nerves investigated. In HMSN II significant increase of Ts were present only in the sural nerve. In CTS significant increase of Ts was found. Measurements of Ts may be useful in the evaluation of the intensity of sensory nerves lesion.