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Titolo:
Magnetoencephalographic investigation of somatosensory homunculus in patients with peri-Rolandic tumors
Autore:
Ishibashi, H; Morioka, T; Nishio, S; Shigeto, H; Yamamoto, T; Fukui, M;
Indirizzi:
Kyushu Univ, Grad Sch Med Sci, Dept Neurosurg, Higashi Ku, Fukuoka 8128582, Japan Kyushu Univ Fukuoka Japan 8128582 rg, Higashi Ku, Fukuoka 8128582, Japan Kyushu Univ, Grad Sch Med Sci, Dept Neurol, Fukuoka 8128582, Japan Kyushu Univ Fukuoka Japan 8128582 i, Dept Neurol, Fukuoka 8128582, Japan Kyushu Univ, Grad Sch Med Sci, Dept Otorhinolaryngol, Fukuoka 8128582, Japan Kyushu Univ Fukuoka Japan 8128582 orhinolaryngol, Fukuoka 8128582, Japan
Titolo Testata:
NEUROLOGICAL RESEARCH
fascicolo: 1, volume: 23, anno: 2001,
pagine: 29 - 38
SICI:
0161-6412(200101)23:1<29:MIOSHI>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOKED MAGNETIC-FIELDS; LARGE-ARRAY BIOMAGNETOMETER; MEDIAN NERVE-STIMULATION; SENSORIMOTOR CORTEX; HUMAN-BRAIN; FUNCTIONAL MRI; CENTRAL SULCUS; MOTOR CORTEX; HUMAN HAND; LOCALIZATION;
Keywords:
magnetoencephalography; somatosensory evoked potentials; somatosensory evoked magnetic fields; somatosensory homunculus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Morioka, T Kyushu Univ, Grad Sch Med Sci, Dept Neurosurg, Higashi Ku, 3-1-1 Maidashi,Fukuoka 8128582, Japan Kyushu Univ 3-1-1 Maidashi Fukuoka Japan8128582 128582, Japan
Citazione:
H. Ishibashi et al., "Magnetoencephalographic investigation of somatosensory homunculus in patients with peri-Rolandic tumors", NEUROL RES, 23(1), 2001, pp. 29-38

Abstract

In order to investigate functional topography of the hand somatosensory cortex in five patients with periRolandic tumors (four frontal lobes and one parietal lobe), we recorded somatosensory evoked fields (SEFs) using magnetoencephalography (MEG) after stimulation of the median nerve (MN) and the five digits. The results obtained were compared with those of five normal healthy subjects. In all five patients, SEFs following MN and digit stimulation showed the previously described respective N20m and N22m components of primary sensory response. Single dipole modeling was applied to determine the three dimensional cortical representations of the N20m and N22m components. The cortical representations of the hand were identical to those of normal subjects, arranging in an orderly somatotopic way from lateral inferior to medial superior in the sequence thumb, MN, index, middle, ring, and little fingers. This sensory homunculus was confirmed by cortical recording of the somatosensory evoked potentials (SEPs) at the time of surgery. Thus, wedemonstrate that SEFs, recorded on MEG in conjunction with source localization techniques, are useful to non-invasively investigate the functional topography of the human hand somatosensory cortex in pathological conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 09:33:24