palpation along the course of the nerve in the tarsal tunnel may elicit discomfort either locally or distally
tarsal tunnel is on the medial aspect of the ankle passing from just behind the tibial malleolus towards the distal aspect of the calcaneus/navicular region
tibial nerve splits into three (medial calcaneal, medial plantar and lateral plantar nerves), often with several branches in the region
symptoms may be accentuated by passive pronation of the foot
percussion of the nerve may cause symptoms distally (Tinel's sign) or proximally (Valleix phenomenon)
X-rays, ultrasound and MRI scans are all helpful in diagnosing pathology that may cause nerve irritation
nerve conduction studies are often reported for diagnosis - however it is not uncommon for these to be normal despite clinical symptoms (1)
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