Table 1.
Summary of demographics and indications for patients with both EMG and brachial plexus MRI
| Demographics | ||||
|---|---|---|---|---|
| Male/Female | 21 / 9 | |||
| Age, (mean/SD) | 37.5 / 17.5 | |||
| Left/Right | 15 / 15 | |||
| Days between EMG and MRI (mean/median) | 11.2/6.5 | |||
| Days from symptom onset to EMG (mean/median) | 290/87 | |||
| Days from symptom onset to MRI (mean/median) | 301/90 | |||
| Indications | ||||
| Indication | Number of Subjects | |||
| PTS | 17 | |||
| Traumatic brachial plexopathy | 6 | |||
| Atraumatic brachial plexopathy of unknown cause | 4 | |||
| Iatrogenic injury (previous shoulder surgery) | 1 | |||
| Post-radiation brachial plexopathy | 1 | |||
| ALS | 1 | |||
| Muscle ROIs | ||||
| Muscle ROI | Abnormal | Normal | Not Assessed by EMG | |
| Supraspinatus | 17 | 3 | 9 | |
| Infraspinatus | 22 | 2 | 6 | |
| Anterior Deltoid | 17 | 10 | 3 | |
| Middle Deltoid | 18 | 12 | 0 | |
| Posterior Deltoid | 15 | 11 | 4 | |
| Total | 89 | 38 | 22 | |
EMG: Electromyography, PTS: Parsonage Turner syndrome, ALS: amyotrophic lateral sclerosis, ROI: region of interest, SD: standard deviation