Action observation plus motor imagery and somatosensory discrimination training are effective non-motor approaches to improve manual dexterity.

Background: Action observation plus motor imagery (AOMI) and somatosensory discrimination training (SSDT) represent sensory input-based approaches to train the motor system without necessarily asking subjects to perform active movements.

Purpose: To investigate AOMI and SSDT effects compared to no intervention on manual dexterity in healthy subjects.

Study Design: Randomized controlled study.