Abstract：
OBJECTIVE:Restoration of somatosensory deficits in humans requires a clear understanding of the neural representations of percepts. To characterize the cortical response to naturalistic somatosensation, we examined field potentials in the primary somatosensory cortex of humans. METHODS:Four patients with intractable epilepsy were implanted with subdural electrocorticography (ECoG) electrodes over the hand area of S1. Three types of stimuli were applied, soft-repetitive touch, light touch, and deep touch. Power in the alpha (8-15 Hz), beta (15-30 Hz), low-gamma (30-50 Hz), and high-gamma (50-125 Hz) frequency bands were evaluated for significance. RESULTS:Seventy-seven percent of electrodes over the hand area of somatosensory cortex exhibited changes in these bands. High-gamma band power increased for all stimuli, with concurrent alpha and beta band power decreases. Earlier activity was seen in these bands in deep touch and light touch compared to soft touch. CONCLUSIONS:These findings are consistent with prior literature and suggest a widespread response to focal touch, and a different encoding of deeper pressure touch than soft touch.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Kramer DR,Barbaro MF,Lee M,Peng T,Nune G,Liu CY,Kellis S,Lee Bdoi
10.1007/s00221-019-05495-1subject
Has Abstractpub_date
2019-05-01 00:00:00pages
1155-1167issue
5eissn
0014-4819issn
1432-1106pii
10.1007/s00221-019-05495-1journal_volume
237pub_type
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