Abnormal projection of corticospinal tracts in a patient with congenital mirror movements.
A 31 year-old woman with familial congenital mirror movements not associated with other neurological defects underwent a detailed neurophysiological evaluation including: voluntary electromyographic activity recorded from upper limbs in response to acoustic stimuli, motor evoked potentials from the thenar muscles to focal transcranial magnetic stimulation, F waves from upper extremities, scalp somatosensory evoked potentials and long-latency responses from thenar muscles to electric stimulation of the median nerve. The results were consistent with the presence of fast-conducting pathways connecting each hand motor cortex with both contra- and ipsilateral spinal motoneurones.
Cincotta
M
M
Department of Neurological and Psychiatric Sciences, University of Florence, Italy.
Ragazzoni
A
A
de Scisciolo
G
G
Pinto
F
F
Maurri
S
S
Barontini
F
F
D000328:Adult; D004576:Electromyography; D005071:Evoked Potentials / Q000502:physiology; D005073:Evoked Potentials, Somatosensory / Q000502:physiology; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006225:Hand / Q000502:physiology*; D006801:Humans; D009044:Motor Cortex / Q000503:physiopathology; D009069:Movement Disorders / Q000151:congenital / Q000503:physiopathology*; D011712:Pyramidal Tracts / Q000002:abnormalities*; D011930:Reaction Time / Q000502:physiology