Tarsal tunnel syndrome [TTS]: clinical and electrophysiological study

ABSTRACT

On a 40 patients [42 feet], this study was conducted. They were 32 females and 8 males, their age ranged from 28 to 51 years. With a mean age of 38.5 years. All of them were with the clinical diagnosis suggestive of TTS. Electrophysiologically, the distal motor latency [DML] to both Abductor hallucis and abductor digiti minimi muscles was significantly prolonged in 62.5% of the cases. 80% of the cases with normal DML demonstrated a significant prolongation of the distal sensory latency [DSL] along the medial plantar branch. The amplitude of the evoked muscle action potential was significantly lowered among all cases, the motor conduction velocity [MCV] proximal to the tarsal tunnel was not significantly lowered. Electromyographic evidences of entrapment was demonstrated in the abductor hallucis muscle