Avtor/Urednik		Šarabon, Nejc
Naslov		Učinki proprioceptivnega in eksteroceptivnega dotoka na funkcijsko stanje motoričnega korteksa pri človeku
Tip		monografija
Kraj izdaje		Ljubljana
Založnik		Univerza v Ljubljani, Medicinska fakulteta
Leto izdaje		2005
Obseg		str. 169
Jezik		slo
Abstrakt		The research part is divided into two sections. The aim of the first one was to find out the effects of the controlled afferent input of different sites and intensities on the neuromuscular excitability of the hand. 36 volunteers participated in 5 experiments. The main findings were: (i) short-latency somatosensory evoked potentials are generally the same if we stimulate median nerve or whole hand, (ii) amplitude and complexity of these sensory potentials depend on the intensity of stimulation, stimulus of below the threshold for conscious perception intensity does not cause measurable potentials, (iii) 30-minute whole-hand electrical stimulation (SO Hz) below the threshold for conscious perception have no significant intluence on median nerve somatosensory evoked potentials, (iv) the same kind of stimulation does not affect spinal segmental or peripheral efferent excitability, measured by H and M waves respectively, (v) acute effects of a single electrical stimulus of median nerve or the whole hand on corticospinal excitability measured by transcranial magnetic stimulation are not significantly different; the amount of the effect depend on the intensity of the afferent stimulation, a single subthreshold stimulus is inefficient for modifying excitability of the efferent system, (vi) previously mentioned 30-minute whole-hand stimulation results in a significant augmentation of corticospinal excitability, the same stimulation of higher intensities (above threshold and motor) cause no systematic changes, (vii) the 30-minute subthreshold stimulation caused increased intracortical facilitation and reduced inracortical inhibition, both measured by a paired-pulse transcranial magnetic stimulation, (viii) similar changes of corticospinal excitability were induced when the effects of 120-minute whole-hand stimulation was tested by the input-output properties of the corticospinal tract. (Abstract truncated at 2000 characters).
Deskriptorji		MOTOR CORTEX PROPRIOCEPTION MECHANORECEPTORS ELECTROMAGNETIC FIELDS MEDIAN NERVE EVOKED POTENTIALS, SOMATOSENSORY ELECTRIC STIMULATION MOTOR NEURONS AFFERENT PATHWAYS PYRAMIDAL TRACTS MUSCLE CONTRACTION EVOKED POTENTIALS, MOTOR ELECTROMYOGRAPHY ARM