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Donor nerves and number of axons.
| Nerves | Number of axons |
|---|---|
| Branch to pectoralis major muscle | 400–600 |
| Phrenic nerve | 800 |
| Intercostal nerve | 1300 |
| Long thoracic nerve | 1600 |
| Spinal accessory nerve | 1700 |
| Motor branch of middle trunk | 3400–4000 |
| C7 root | 16000–40000 |
| Nerve for the long head of brachial biceps | 1200 |
