Somatosensory dynamic gamma-band synchrony: a neural code of sensorimotor dexterity

Autor: Roberto Sigismondi, Giulia Barbati, Franca Tecchio, Sara Graziadio, Marco Balsi, Paolo Maria Rossini, Camillo Porcaro, Filippo Zappasodi, Giancarlo Valente
Přispěvatelé: F., Tecchio, S., Graziadio, Barbati, Giulia, R., Sigismondi, F., Zappasodi, C., Porcaro, G., Valente, M., Balsi, P. M., Rossini
Jazyk: angličtina
Rok vydání: 2007
Předmět:
Adult
Male
Cognitive Neuroscience
Electroencephalography
Thumb
Somatosensory system
Functional Laterality
physiology
Somatosensory Cortex
anatomy /&/ histology/physiology
Functional Laterality
Fingers
Cognition
medicine
Humans
Adult
Algorithms
Cognition
physiology
Cortical Synchronization
Electroencephalography
Female
Fingers
physiology
Humans
Male
Motor Skills
physiology
Psychomotor Performance
physiology
Cortical Synchronization
Motor skill
physiology
Cortical Synchronization
Electroencephalography
Female
Finger
anatomy /&/ histology/physiology
Sensory stimulation therapy
medicine.diagnostic_test
Little finger
Somatosensory Cortex
physiology
Humans
Male
Motor Skill
medicine.anatomical_structure
Neurology
Motor Skills
Female
Neural coding
Psychology
Neuroscience
Algorithms
Psychomotor Performance
Zdroj: NeuroImage (Orlando Fla., Print) 35 (2007): 185–193.
info:cnr-pdr/source/autori:Tecchio F, Graziadio S, Barbati G, Sigismondi R, Zappasodi F, Porcaro C, Valente G, Balsi M, Rossini PM/titolo:Somatosensory dynamic gamma-band synchrony: a neural code of sensorimotor dexterity/doi:/rivista:NeuroImage (Orlando Fla., Print)/anno:2007/pagina_da:185/pagina_a:193/intervallo_pagine:185–193/volume:35
Popis: To investigate neural coding characteristics in the human primary somatosensory cortex, two fingers with different levels of functional skill were studied. Their dexterity was scored by the Fingertip writing test. Each finger was separately provided by a passive simple sensory stimulation and the responsiveness of each finger cortical representation was studied by a novel source extraction method applied to magnetoencephalographic signals recorded in a 14 healthy right handed subject cohort. In the two hemispheres, neural oscillatory activity synchronization was analysed in the three characteristic alpha, beta and gamma frequency bands by two dynamic measures, one isolating the phase locking between neural network components, the other reflecting the total number of synchronous recruited neurons. In the dominant hemisphere, the gamma band phase locking was higher for the thumb than for the little finger and it correlated with the contra-lateral finger dexterity. Neither in the dominant nor in the non-dominant hemisphere, any effect was observed in the alpha and beta bands. In the gamma band, the amplitude showed similar tendency to the phase locking, without reaching statistical significance. These findings suggest the dynamic gamma band phase locking as a code for finger dexterity, in addition to the magnification of somatotopic central maps.
Databáze: OpenAIRE
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