Chapter 10 questions Flashcards
Hubel and Wiesel’s theoretical model has been characterized as a _______ model.
hierarchical
In aged monkeys, neurons of visual cortex show _______ spontaneous activity and _______ orientation selectivity.
increased; decreased
Mirror neurons were first observed in the _______ region of the monkey brain in response to the observation of motor movements by another monkey.
premotor cortex
Capture of one photon of light in a photoreceptor can block the entry of _______ Na+ ion(s).
1 million
An on-center/off-surround cell responds most strongly when…
the entire center illuminated
Because the visual system integrates stimuli over time, its performance is relatively….
slow but sensitive
In area V5 of the visual cortex, cells appear to be sensitive to _______ but not to _______.
movement; wavelength
Cortical area V5 has many cells that respond preferentially to..
motion
Cones in the retina form synapses with which cell type?
Bipolar cells
Cells in the primate LGN have receptive fields that…
are concentric
At any given time, a photoreceptor operates approximately over a ____ range.
100-fold
Among mammals, color vision is…
weak in some primates
Cortical area V4 has many cells that respond preferentially to…
concentric and radial stimuli
Based upon differences between Old and New World Monkeys, which photopigments are thought to have differentiated most recently, in evolutionary terms?
M and L cones
Ocular dominance is seen especially strongly in which layer of primary visual cortex?
IV
