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Thoracic Spine

Dermatomes/Myotomes/Reflexes

TermDefinition
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
Created by: Dr.Grandolph
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