Until the late Carboniferous Period, Siberia was rotated 180° from its present orientation.
Laurentia, a craton primarily made up of present-day North America and Greenland, was rotated 90° clockwise from its present orientation and sat astride the paleoequator during Cambrian times.
Something similar may have happened on Mars, where a collection of large volcanoes in the Tharsis region is believed to have caused the planet to realign to its present orientation with Tharsis on the equator.
The N83° W direction is the present orientation of the σ 1-axis at (35.7° N, 136.6° E) in the Neodani fault obtained by the stress inversion at the depth of 5 10 km.
Before tilting to their present orientation, these four formations were a continuous pile of mud and sand 3 mile deep that accumulated slowly on the nearshore ocean bottom.
Although vinpocetine treatment restores orientation selectivity maps in alcohol exposed animals, we cannot discard the possibility that at the cellular level, neurons still present orientation tuning deficits [9].
The main hypothesis guiding our analysis of ISs in bacterial genomes was that, if IS insertions are associated with host replication, they could, given some conditions, present orientation patterns in the chromosome.
Therefore, even for the most complex stimuli that contained a rich mixture of multiple orientations, we found sensitive cortical tuning for changing orientations rather than for currently presented orientations.
Under an early BD regime, neurons remain responsive to all presented orientations until 4 months of age (Pettigrew 1974; Crair et al. 1998; for a review, see Sherman and Spear 1982).
When gratings were presented, the population tuning curves showed a peak at the preferred orientation, and a significant reduction as the difference between preferred orientation and presented orientation increased (P < 0.001, three-factor anova, main effect orientation; Table 1).
