PMID- 18065721
OWN - NLM
STAT- MEDLINE
DCOM- 20081212
LR  - 20080717
IS  - 1460-2199 (Electronic)
IS  - 1047-3211 (Linking)
VI  - 18
IP  - 8
DP  - 2008 Aug
TI  - Dynamic properties of the representation of the visual field midline in the 
      visual areas 17 and 18 of the ferret (Mustela putorius).
PG  - 1941-50
AB  - In mammals, the visual field is split along the midline, each hemisphere 
      representing the contralateral hemifield. We determined that, in the ferret, an 
      8- to 10-deg-wide strip of visual field near the midline is represented in both 
      hemispheres. Bright squares (1.5 deg) were flashed at different azimuths within 
      the central 20 deg of the visual field. Stimuli were flashed either alone or 
      sequentially, and the responses were analyzed with the voltage-sensitive dye 
      (VSD) RH 795 and/or by recording local field potentials (LFPs). In both VSD and 
      LFP experiments, each stimulus evoked a cortical response field that extended 
      over visual areas 17 and 18 up to a surface of 1-1.5 mm(2) and then shrank again. 
      Amplitude of the responses decreased approaching the visual midline and the 
      latency increased. These positional differences are likely to originate from the 
      spatiotemporal structure of the peripheral response fields (PRFs) that form a 
      mosaic in areas 17 and 18, interrupted near the visual midline. Unexpectedly, 
      interhemispheric connections appear not to modify these PRFs' effects and may not 
      contribute to the responses to discrete, flashed stimuli.
FAU - Nakamura, Hiroyuki
AU  - Nakamura H
AD  - Department of Neuroscience, Karolinska Institutet, S-17177 Stockholm, Sweden.
FAU - Chaumon, Maximilien
AU  - Chaumon M
FAU - Klijn, Floor
AU  - Klijn F
FAU - Innocenti, Giorgio M
AU  - Innocenti GM
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20071207
PL  - United States
TA  - Cereb Cortex
JT  - Cerebral cortex (New York, N.Y. : 1991)
JID - 9110718
SB  - IM
MH  - Animals
MH  - Brain Mapping/methods
MH  - Corpus Callosum
MH  - Female
MH  - Ferrets/*physiology
MH  - Photic Stimulation/methods
MH  - Visual Cortex/*physiology
MH  - Visual Fields/*physiology
MH  - Visual Pathways/physiology
MH  - Visual Perception/physiology
EDAT- 2007/12/11 09:00
MHDA- 2008/12/17 09:00
CRDT- 2007/12/11 09:00
PHST- 2007/12/11 09:00 [pubmed]
PHST- 2008/12/17 09:00 [medline]
PHST- 2007/12/11 09:00 [entrez]
AID - bhm221 [pii]
AID - 10.1093/cercor/bhm221 [doi]
PST - ppublish
SO  - Cereb Cortex. 2008 Aug;18(8):1941-50. doi: 10.1093/cercor/bhm221. Epub 2007 Dec 
      7.