Insertion of BMP5 in developing chicken prosencephalon causes loss of ventral forebrain secondary to immense cell death localized to that region.
The ventral primary feathers, secondary and tail feathers are olive green.
In hylobatids, which engage primarily in suspensory orthograde locomotion and posture, there apparently is a secondary ventral shift of the septum so that the transposition is lost.
Some artiodactyl groups that have secondary ventral shifting of the horizontal septum also have co-linearity with the neuraxis and thus have parallel evolution of the pedicle perforations for the nerve roots instead of intervertebral foramina (Figure 23).
The remarkable successes in identifying the brain activity associated with viewing classes of visual depictions of objects has focused, unsurprisingly, on the brain's primary and secondary (ventral temporal) visual areas.
Specific retinopathy, deficits in the primary visual pathway and the secondary ventral and dorsal pathways, as well as dysfunction of the attention pathways have all been posited as causes of hallucinations in Parkinson's disease.
In many instances, the ventral and dorsal projecting secondary motoneuron axons were stalled when exiting the ventral root (Fig. 9B and C).
The grafted dorsal lip was able to 'organize' the neighboring cells of the host embryo to form a complete secondary dorsal-ventral and antero-posterior pattern of body axis in addition to the primary body axis, and the graft itself became the notochord.
