Question
Root value of thoracodorsal nerve ‑
| A. | C5,C6,C7 |
| B. |
C8,T1 |
| C. |
C6,C7,C8 |
| D. |
Ti T2 |
Show Answer
|
Correct Answer � C Explanation |
 |
Ans. is ‘c’ i.e., C6C7C8
Branches of brachial plexus
- Branches of brachial plexus arises from different anatomical segments : –
1. Branches of the roots
- Nerve to serratus anterior (long thoracic nerve) (C5, C6, C7).
- Nerve to rhomboideus (dorsal scapular nerve) (C5).
2. Branches of the trunks
- These arise only from the upper trunk which gives two branches. I. Suprascapular nerve (C5, C6)
- Nerve to subclavius (C5, C6)
3. Branches of the cords
1. Branches of lateral cord
- Lateral pectoral (C5-C7)
- Musculocutaneous (C5-C7)
- Lateral root of median (C5-C7)
2. Branches of medial cord
- Medial pectoral (C8, T1)
- Medial cutaneous nerve of arm (C8, TO
- Medial cutaneous nerve of forearm (C8, Ti).
- Ulnar (C7, C8, Ti). C7 fibres reach by a communicating branch from lateral root of median nerve.
- Medial root of median (C8, T1).
3. Branches of posterior cord
- Upper subscapular (C5, C6)
- Nerve to latissimus dorsi (thoracodorsal) (C6, C7, CO
- Lower subscapular (C5, C6)
- Axillary (circumflex) (C5, C6)
- Radial (C5-C8, T1)