In two patients with a history of spinal cord injury many years ago fa
sciculations developed in muscles belonging to previously damaged segm
ents. In both patients MRI of the cervical spine showed an area of abn
ormal signal intensity representing a cavity, near the level of the ne
urological abnormalities and the cord injury. During a 4-year follow-u
p period no new neurological or MRI abnormalities were detected. A hyp
othesis for the genesis of fasciculations following spinal cord injury
is presented.