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What are these?
In the last 3 years, in two different patients, we have found during the EMG the activities shown in the attached images. The first time in the Gastrocnemius medialis muscle, while trying to record spontaneous activity; the patient didn’t achieve full relaxation, and the sparse MUPs triggered the activity in question. In the second occasion the activity was recorded in the Deltoid, only triggered by needle movements. I considered these as variants of CRDs/increased insertional activity. Both cases were referred for possible radiculopathies, with findings in the clinical/EDX examination congruent with MRI abnormalities, no other diagnoses suspected or established. The particularity of MUP-triggered CRD have been documented before? Am I right? What other possibilities could there be?
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I enjoy participating in the AANEM Connect Forum for a number of reasons. There are very fundamental questions posed on a frequent basis that cause me to pause and ask myself, ‘Why didn’t I think of that?’ Also, I continue to learn new things when others contribute their thoughts and experiences. Connect is an excellent opportunity for members to interact and to address any topic, including those that may not be discussed at an annual meeting or journal article.
Daniel Dumitru, MD, PhD