<prompt> Brachial plexus injury with Horners syndrome, nerve root level involved is :C5C6C7T1  <response>: - Horner syndrome is due to involvement of white matter of spinal cord at T1 level. Klumpkes palsy: Occurs in lower trunk of brachial plexus C8-T1 Claw hand is present due to the paralysis of intrinsic muscles of hand It is associated with Horners syndrome Has poor prognosis 