Activation of primary and secondary somatosensory regions following tactile stimulation of the face

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Rainer Kopietz - , Ludwig-Maximilians-Universität München (LMU) (Autor:in)
  • Vehbi Sakar - , Ludwig-Maximilians-Universität München (LMU) (Autor:in)
  • Jessica Albrecht - , Ludwig-Maximilians-Universität München (LMU) (Autor:in)
  • Anna Maria Kleemann - , Ludwig-Maximilians-Universität München (LMU) (Autor:in)
  • Veronika Schöpf - , Ludwig-Maximilians-Universität München (LMU) (Autor:in)
  • Indra Yousry - , Ludwig-Maximilians-Universität München (LMU) (Autor:in)
  • Jennifer Linn - , Klinikum der Ludwig-Maximilians-Universität (LMU) München, Ludwig-Maximilians-Universität München (LMU) (Autor:in)
  • Gunther Fesl - , Ludwig-Maximilians-Universität München (LMU) (Autor:in)
  • Martin Wiesmann - , Ludwig-Maximilians-Universität München (LMU) (Autor:in)

Abstract

Background: : Since the work of Penfield & Rasmussen it is well established that the human primary somatosensory cortex is organized somatotopically. However, the order of the representation of the face is still a matter of discussion, i.e., it is yet unclear whether the face is represented upside-down or vice versa in the somatosensory cortex. Material and Methods: : In a functional magnetic resonance imaging study (n = 30), tactile stimuli to three different locations on each side of the face were applied using a pneumatic device. Locations of stimulation corresponded to the three branches of the trigeminal nerve (forehead, cheek, chin). To determine the representation of the face on primary and secondary somatosensory cortices, peak coordinates within these regions were analyzed subjectwise. Results: : Contralateral activation of the primary somatosensory cortex following tactile stimulation of the face was found, whereas the secondary somatosensory cortices were activated bilaterally. However, differences between activation coordinates of different tactile stimuli applied to one side of the face were not statistically significant. Conclusion: : Tactile stimulation of the face leads to contralateral activation of primary and bilateral activation of secondary somatosensory cortices. Using the authors' methodological approach it was not possible to detect a somatotopic organization related to different facial areas.

Titel in Übersetzung
Aktivierung primärer und sekundärer somatosensorischer Regionen nach taktiler Stimulation des Gesichts

Details

OriginalspracheEnglisch
Seiten (von - bis)135-144
Seitenumfang10
FachzeitschriftClinical neuroradiology
Jahrgang19
Ausgabenummer2
PublikationsstatusVeröffentlicht - Juni 2009
Peer-Review-StatusJa
Extern publiziertJa

Externe IDs

PubMed 19636504

Schlagworte

Schlagwörter

  • Homunculus, Mechanoception, Somatosensory, Somatotopy, Trigeminal nerve