Somatosensory Homunculus as Drawn by MEG

Sensory mapping of lip representation in brass musicians with embouchure dystonia

“…Somatotopical order: The order of the cortical representations for lips and fingers of the patients and the controls is consistent with several previous reports [9,[14][15][16]. This indicates that, in addition to the Euclidian distance and the orthogonal direction such as superior-inferior or mediallateral, the polar angle is effective in examining somatotopical organization.…”

Neural modeling and imaging of the cortical interactions underlying syllable production

“…The relative locations of the lip, tongue, and palate were confirmed in the macaque (McCarthy et al, 1995). Consistent with early electrophysiological work (Penfield eta!., 1950) and a recent MEG study (Nakamura eta!., 1998), we have placed the upper lip representation dorsomedial to the lower lip representation. Graziano, Taylor, Moore, and Cooke (2002) report early electrical stimulation work (Fulton, 1938;Foerster, 1936) which depicts a sens01y representation of the larynx at the inferior extent of the postcentral gyrus, near the Sylvian fissure.…”

Evaluation of lip sensory disturbance using somatosensory evoked magnetic fields

“…1A[1]). We designated these 2 responses as P25m and P60m according to the nomenclature system employed in previous studies of lip SEFs by electrical stimulation (Hoshiyama et al, 1996;Nagamatsu et al, 2001;Nakahara et al, 2004) and mechanical stimulation (McDonald et al, 1996;Nakamura et al, 1998;Yamashita et al, 1999;Disbrow et al, 2003;Nguyen et al, 2004;Nevalainen et al, 2006;Tamura et al, 2008). In addition, as in the case of subject 4, we detected 2 components other than P25m and P60m at around 45 ms and 80 ms over the contralateral hemisphere, i.e., at 47 and 73 ms over the right hemisphere for left-side stimulation, which we named P45m and P80m ( Fig.…”