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Affected Reflexes
Reflexes affected if nerve root damage
| Nerve Root: | Reflexes Affected: |
|---|---|
| C1 | None |
| C2 | None |
| C3 | None |
| C4 | None |
| C5 | Biceps, brachioradialis |
| C6 | Biceps, brachioradialis |
| C7 | Triceps |
| C8 | Triceps |
| T1 | Disk lesions @ upper 2 thoracic levels dont give rise 2 root weakness of hand intrinsic muscles r due 2 other pathology. Dural & nerve root stress has T1 elbow flex w/ arm horizontal. T1-2 scapulae ->&back on chest wall. Neck flex at any thoracic level |
| T2 | Disk lesions @ upper 2 thoracic levels dont give rise 2 root weakness of hand intrinsic muscles r due 2 other pathology. Dural & nerve root stress has T1 elbow flex w/ arm horizontal. T1-2 scapulae ->&back on chest wall. Neck flex at any thoracic level |
| T3-T12 | Articular and dural signs and root pain are common. root signs (cutaneous analgesia) are rare and have such indefinite area that they have little localizing value. Weakness not detectable. |
| L1 | None |
| L2 | None |
| L3 | Knee jerk sluggish, PKB positive, pain on full SLR |
| L4 | SLR limited, neck flexion pain, weak or absent knee jerk, side flexion limited |
| L5 | SLR limited one side, neck flexion painful, ankle decreased, crossed-leg raising pain |
| S1 | SLR limited, Achille's reflex weak or absent |
| S2 | SLR limited, Achille's reflex weak or absent |
| S3 | None |
| S4 | None |