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Thoracic Spine
Dermatomes/Myotomes/Reflexes
| Term | Definition |
|---|---|
| T1: Dermatome | Medial side of forearm to base of little finger |
| T2: Dermatome | Medial side of upper arm to medial elbow, pectoral and mid-scapular areas |
| T2: Muscle Weakness | Disk lesions at T1 and T2 do not give rise to root weakness. Weakness of intrinsic muscles of the hand is due to other pathology |
| T2: Affected Reflex | None |
| T2: Paresthesias | None |
| T3-T6: Dermatome | Upper Thorax |
| T3-T6 : Muscle Weakness | Articular and dural signs and root pain are common. Root signs (cutaneous analgesia) are rare and have such indefinite area, they have little localizing value. Weakness not detectable. |
| T3-T6: Affected Reflex | None |
| T3-T6: Paresthesias | None |
| T5-T7: Dermatome | Costal Margin |
| T5-T7: Muscle Weakness | Articular and dural signs and root pain are common. Root signs (cutaneous analgesia) are rare and have such indefinite area, they have little localizing value. Weakness not detectable. |
| T5-T7: Affected Reflex | None |
| T5-T7: Paresthesias | None |
| T8-T12: Dermatome | Abdomen and Lumbar Region |
| T8-T12: Muscle Weakness | Articular and dural signs and root pain are common. Root signs (cutaneous analgesia) are rare and have such indefinite area, they have little localizing value. Weakness not detectable. |
| T8-T12: Affected Reflex | None |
| T8-T12: Paresthesias | None |