Early sensory re-learning after median nerve repair: a case study
Sensory re-learning programs after peripheral nerve repair has not changed over the last two decades. Timing of sensory re-learning is one of the intrinsic and extrinsic factors influence the functional outcome. The aim for Phase I re-learning is to activate and maintain the cortical hand representation.
Mrs X's median nerve (100%) was repaired at the wrist level. Sensory re-learning was introduced in the second week following surgery i.e. long before any signs of nerve regeneration in the hand and fingers. Mirror-training and a new method (dowel textures) with auditory input that substitute temporary missing sensory input were used.
Patient's recovery of hand function during the first two years after median nerve repair was well above the prediction intervals. Of the three domains: sensory innervation, motor innervation and pain/discomfort, tactile gnosis as part of the sensory innervation showed the lowest recovery. This is an area of re-learning, which could be much improved to optimise the final outcome.
Optimal timing of Phase I sensory re-learning has yet to be determined. As the Sensor Glove was not available, a novel method of dowels covered with textures were made and used in similar manner. However, it is more difficult using dowels to detect friction sound than with sensor glove, because there are no microphones to enhance the sound.
Early introduction of sensory re-learning can enhance the outcome following nerve repair.Dowel textures as a substitution for Sensor Glove can be used in Phase I sensory re-learning.