In the next section, we describe the characteristics of forward (ascending) and backward (descending) projections in sensory hierarchies, and then apply these characteristics as tests to motor projections in the subsequent section.
In neurobiological implementations of this scheme, the sources of bottom up prediction errors are generally thought to be superficial pyramidal cells, because they send forward (ascending) connections to higher cortical areas.
In the third section, we describe forward-type ascending and backward-type descending connections in the visual system, and use these features to furnish 'tests' for forward and backward connections in the motor system.
The now mature spermatozoa are able to move forward and ascend the female reproductive tract.
"When the pin was released and our payload [SPIDER] snapped forward and started ascending, I simultaneously felt relief, fear and immense pride in the team for what we'd accomplished". Jones credited his team with the success of the launch, especially the graduate students and postdoctoral researchers.
Since the late 1970s (e.g. Rockland and Pandya 1979), it has been known that extrinsic corticocortical (ignoring thalamocortical) connections between areas in the visual system have distinct laminar characteristics, which depend on whether they are ascending (forward) or descending (backward).
It is clear that with some minor adjustment of the criteria for forward and backward connections, ascending and descending connections in the motor hierarchy should be classified as forward and backward types, respectively.
This intensified ligand-RAGE interaction drives the disease process forward, resulting in an ascending spiral of cellular dysfunction.
Finally, the patent describes the forward elevator, used for ascending and descending.
This paper refers to extrinsic connections between cortical areas (and subcortical structures and the spinal cord) as afferent, efferent, ascending, descending, forward, backward, driving and modulatory.
The figures are placed at an angle, so that they seemed to be ascending – propelled forwards as a nation united, into an idealised future.
