Visual hemifield mapping using transcranial magnetic stimulation coregistered with cortical surfaces derived from magnetic resonance images.
The perception of a visual stimulus can be inhibited by occipital transcranial magnetic stimulation. This visual suppression effect has been attributed to disruption in the cortical gray matter of primary visual cortex or in the fiber tracts leading to V1 from the thalamus. However, others have sugg...
| Published in: | Journal of Clinical Neurophysiology Vol. 15; no. 4; pp. 344 - 351 |
|---|---|
| Main Authors: | , , , , , , , , , , , , , , , , , , , |
| Format: | research Journal Article |
| Published: |
Lippincott Williams & Wilkins
Jul1998
|
| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=112252923&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 112252923 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 07360258 8CL jtl: Journal of Clinical Neurophysiology issn: 07360258 maglogo: N pubinfo: dt: Jul1998 vid: 15 iid: 4 pid: 5086 pub: Lippincott Williams & Wilkins place: Baltimore, Maryland artinfo: ui: 112252923 112252923 NLM9736468 112252923 10.1097/00004691-199807000-00006 NLM9736468 112252923 ppf: 344 ppct: 7 formats: tig: atl: Visual hemifield mapping using transcranial magnetic stimulation coregistered with cortical surfaces derived from magnetic resonance images. aug: au: Potts, Geoffrey F. Gugino, Laverne D. Leventon, Michael E. Grimson, W. Eric L. Kikinis, Ron Cote, Wayne Alexander, Eban Anderson, Jane E. Ettinger, Gil J. Aglio, Linda S. Shenton, Martha E. Pascual-Leone, Alvaro Meador, Kimdor J. Potts, G F Gugino, L D Leventon, M E Grimson, W E Kikinis, R Cote, W Alexander, E affil: Departments of ∗Psychiatry, † Anesthesiology, ¶ Radiology, ∗∗Neurosurgery, Harvard Medical School, Boston; ‡ Brockton VA Medical Center, Brockton; Department of # Anesthesiology, § Brigham and Women's Hospital, Boston; ∥ Department of Computer Science Massachusetts Institute of Technology, Cambridge, Massachusetts sug: subj: Neural Pathways Physiology Brain Mapping Methods Evoked Potentials, Visual Physiology Visual Perception Physiology Occipital Lobe Physiology Visual Fields Physiology Magnetic Resonance Imaging Occipital Lobe Anatomy and Histology Central Nervous System Physiology Nervous System Physiology Physiology Physical Stimulation Female Image Processing, Computer Assisted Electromagnetic Fields Adult Male Human Validation Studies Comparative Studies Evaluation Research Multicenter Studies Adult: 19-44 years Female Male ab: The perception of a visual stimulus can be inhibited by occipital transcranial magnetic stimulation. This visual suppression effect has been attributed to disruption in the cortical gray matter of primary visual cortex or in the fiber tracts leading to V1 from the thalamus. However, others have suggested that the visual suppression effect is caused by disruption in secondary visual cortex. Here the authors used a figure-eight coil, which produces a focal magnetic field, and a Quadropulse stimulator to produce visual suppression contralateral to the stimulated hemisphere in five normal volunteer subjects. The authors coregistered the stimulation sites with magnetic resonance images in these same subjects using optical digitization. The stimulation sites were mapped onto the surface of the occipital lobes in three-dimensional reconstructions of the cortical surface to show the distribution of the visual suppression effect. The results were consistent with disruption of secondary visual cortical areas. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|