anterior cord syndrome results from the loss of neurologic function in those areas supplied by the anterior spinal artery ( Fig 112.34 ) Motor function is lost below the level of the lesion Touch and proprioceptive functions, carried by the dorsal (posterior) columns, are preserved The posterior cord syndrome is rare ( Fig 112.34 ) It involves the loss of proprioceptive functions, deep pressure, and pain and vibratory sense, with preservation of motor and temperature sensation This can occur with direct posterior cord trauma or posterior spinal artery involvement The Brown-Séquard syndrome (hemisection of the cord) involves contralateral loss of pain and temperature sensation with ipsilateral motor findings (weakness or paralysis) below the lesion ( Fig 112.34 ) The central cord syndrome signifies an injury that is most severe in the center of the cord and less so toward the periphery ( Fig 112.34 ) The resultant physical examination demonstrates motor strength that is more severely depressed in the arms than in the legs These designations may be useful in suggesting prognosis Approximately two-thirds of those patients with central cord syndrome and one-third of those with the BrownSéquard syndrome recover Complete transections and anterior cord syndrome usually signify nonreversible lesions Patients with posterior cord syndrome usually recover but may demonstrate some degree of ataxia