click below
click below
Normal Size Small Size show me how
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 |