Introduction
Numbness and tingling in the toes often indicate peripheral nerve dysfunction. In podiatry practice, a structured neurological assessment helps identify the distribution and severity of sensory impairment. This approach supports differential diagnosis between conditions such as distal symmetrical polyneuropathy and focal entrapment, while guiding appropriate management and onward referral (Boulton et al., 2005). The following sections outline the key assessments routinely performed and the rationale for each.
Patient History and Symptom Evaluation
A detailed history precedes physical testing. The clinician records onset, duration, aggravating factors and associated symptoms such as pain or weakness. This information narrows possible aetiologies; bilateral symptoms may suggest metabolic causes, whereas unilateral toe involvement raises suspicion of local nerve compression. History also reveals systemic risk factors, for example diabetes or vitamin deficiencies, thereby informing the choice and interpretation of subsequent tests.
Sensory Testing
Quantitative sensory tests form the core of the examination. A 10 g Semmes-Weinstein monofilament is applied to ten sites on the plantar forefoot. Inability to detect the filament at multiple sites indicates loss of protective sensation and correlates with elevated ulceration risk. Vibration perception threshold is assessed using a 128 Hz tuning fork applied to the hallux interphalangeal joint; diminished perception suggests large-fibre involvement. Pinprick sensation and temperature discrimination further evaluate small-fibre function. These simple bedside tests are reliable, inexpensive and directly relevant to daily podiatric decision-making.
Motor, Reflex and Special Tests
Muscle strength is graded for ankle dorsiflexion, plantarflexion and toe extension to detect motor neuropathy or radiculopathy. The Achilles reflex is tested bilaterally; asymmetry may point to S1 root or peripheral nerve pathology. Where tarsal tunnel syndrome is suspected, Tinel’s sign is elicited posterior to the medial malleolus. Positive reproduction of paraesthesia supports focal entrapment and may prompt further investigation such as nerve conduction studies.
Conclusion
Systematic neurological assessment enables podiatrists to quantify sensory loss, localise lesions and initiate timely interventions. Early detection of neuropathy reduces complications, including ulceration and falls, and facilitates appropriate multidisciplinary referral when indicated.
References
- Boulton, A.J.M., Vinik, A.I., Arezzo, J.C., Bril, V., Feldman, E.L., Freeman, R., Malik, R.A., Maser, R.E., Sosenko, J.M. and Ziegler, D. (2005) Diabetic neuropathies: a statement by the American Diabetes Association. Diabetes Care, 28(4), pp.956–962.
- National Institute for Health and Care Excellence (2019) Diabetic foot problems: prevention and management. NICE guideline NG19. Manchester: NICE.
