:: There is still a lot of argument about how imagination works, but one popular view, backed especially by Stephen Kosslyn, is that the sensory parts of the brain play a major role in imagining things in a given sensory modality, especially the higher-level sensory areas.
32.
It is arranged as follows : proprioceptive receptors of lower limb-> peripheral process-> dorsal root ganglion-> central process-> Clarke's column-> 2nd order neuron-> medulla oblogata ( Caudate nucleus )-> 3rd order neuron-> VPL of thalamus-> 4th order neuron-> posterior limb of internal capsule-> corona radiata-> sensory area of cerebrum.
33.
A number of studies have shown that activity in primary sensory areas of the brain is not sufficient to produce consciousness : it is possible for subjects to report a lack of awareness even when areas such as the primary visual cortex show clear electrical responses to a stimulus.
34.
There is probably only general agreement that it is not the level of the whole brain, since there is evidence that signals in certain primary sensory areas, such as the V1 region of the visual cortex ( in addition to motor areas and cerebellum ), do not contribute directly to phenomenal experience.
35.
Later research has mapped out functional divisions within the brain, identifying sensory areas, motor cortex areas and associative areas, and has investigated connectivity patterns both laterally between the two hemispheres and from front to back ( to the hindbrain and brainstem ) to demonstrate how the brain deals with general bodily functions.
