Article

We report on a patient with traumatic brain injury who showed neural connection
between injured cingulum and pedunculopontine nucleus on diffusion tensor
tractography (DTT). A 74-year-old male who had suffered a traffic accident
underwent conservative management for subarachnoid haemorrhage. Brain MRI which
was performed 6 months after onset showed no specific lesions. On 6-month DTTs
for cingulum of the patient, we observed discontinuations of both cingulums above
the genu of corpus callosum. However, the left cingulum was connected to the left
PPN via a neural tract that passed through the anterior corona radiata and
thalamus. The neural connection between the injured cingulum and PPN seems to be
a compensatory phenomenon for the destruction of cholinergic pathways from basal
forebrain. We believe that this result might suggest one of recovery mechanisms
of injured cingulum following brain injury.

Langue : ANGLAIS