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Klumpke's PalsyInjury to lower brachial plexus:%u2022 C8-T1 rootsCauses:%u2022 Upward force (pulling) to upper limb%u2022 Vaginal birth injury%u2022 Accidental injury to neckAffected muscles:%u2022 Intrinsic hand muscles, thenar, and hypothenar muscles%u2022 Forearm pronators and wrist flexorsAssociated finding:%u2022 Horner's syndrome (with T1 involvement)
