Author/Editor		Romeo, S; Pedace, F; Gilio, F; Inghilleri, M; Berardelli, A
Title		Changes of muscle evoked responses after repetitive stimulation of cortical motor areas in normal subjects
Type		članek
Source		In: Stalberg EV, de Weerd AW, Zidar J, editors. ECCN 98. 9th European congress of clinical neurophysiology; 1998 Jun 4-7; Ljubljana. Bologna: Monduzzi editore,
Publication year		1998
Volume		str. 89-93
Language		eng
Abstract		We studied the effect of repetitive transcranial magnetic stimulation delivered to the motor cortex at 120% motor threshold intensity in 13 subjects at rest and in 8 subjects during a background contraction. A train of 20 stimuli delivered at a frequency of 5 Hz with th subjects at rest increased the size of muscle evoked potentials evoked in hand and forearm muscles; the facilitation was already evident over trains of 11 stimuli. The facilitation of the test response obtained after a conditioning train of stimli outlasted the trains by 600 ms. When the subjects voluntarly contracted the target muscle a train of 20 stimuli at 5 Hz left the size of the MEP unchanged. We conclude that repetitive transcranial magnetic stimulation changes motor cortex excitability by facilitating cortical excitatory interneurones.
Descriptors		MOTOR CORTEX MUSCLE CONTRACTION EVOKED POTENTIALS, MOTOR