Synkinesis - Treatment - Biofeedback

Biofeedback

Biofeedback therapy for facial synkinesis aims to increase the patient’s awareness of the facial muscle posture and movement. Facial muscles contain few to none intrinsic muscle sensory receptors (used for proprioceptive feedback) and additionally they do not span movable joints and so lack joint receptors (another source for proprioceptive feedback). Thus, biofeedback allows the patient to actively sense the motion of their muscles. The two common forms of biofeedback used are electromyographic feedback and mirror feedback. Electromyographic feedback includes visual EMG signals (coming from facial muscle sites displayed to the patient from a computer in the form of waveform traces) or auditory signals that indicate strength of muscle contraction. The subsequent role of the patient is to control the movement of undesired muscle during volitional movement by incorporating the information perceived through the EMG. While mirror feedback is a much more basic way of providing the patient feedback on muscle movement, studies have shown that both are very effective options for synkinesis/paresis reduction. Biofeedback is commonly coupled to facial retraining techniques to achieve maximal effectiveness.
A study by Nakamura et al. has shown that biofeedback works better for prevention of synkinesis as opposed to treatment of synkinesis. Due to the extreme efforts needed to achieve improvements during synkinesis, Nakamura et al. observed that patients will often fail to reach their desired goal because of the difficulty of maintaining motivation during training. The desired course of action is to catch the patient shortly after facial nerve trauma and teach the patient biofeedback techniques. This course of action has been experimentally proven to significantly reduce the development of synkinesis.

Read more about this topic:  Synkinesis, Treatment

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