Characters that support positions in this part of the tree are the continuous tectum
and sessile stigma, as in Amborella and Nymphaeales (symplesiomorphies), and the orthotropous ovule, as in Amborella (either a symplesiomorphy or a synapomorphy).
In our experiments, AIP in zebrafish was ubiquitously expressed in all major divisions of the brain including the olfactory bulbs, telencephalon, optic tectum
, cerebellum, medulla, and hypothalamus.
Citation: Yuki Shimizu et al., "Wnt signaling regulates proliferation and differentiation of radial glia in regenerative processes after stab injury in the optic tectum
of adult zebrafish," Glia, 2018; DOI: 10.1002/glia.23311
Normally, the first retinal axons reach and start to arborize the optic tectum
at 2 dpf and a preliminary arborization of the tectum
is formed at 3dpf (data not shown).
Los granos con un tipo de exina con tectum
sostenido por columelas y espinas supratectadas parece corresponder a una condicion ancestral presente en Abelia y de la cual posiblemente derivo el polen semitectado e intectado como el de Viburnum (Donoghue, 1985).
Yves Biesmans, administrator, Tectum
Group, said that the company focuses on providing facility management for commercial and industrial roofs.
Figure-3: Post-contrast T1-weighted sagittal view of the hypothalamus, pituitary stalk, tectum
and periaqueductal field with contrast enhanced areas.
These previously unknown neurons in the dorsal region of the midbrain (tectum
) differ in their directional sensitivity and in the structure of their finely branched projections.
Light-near dissociation can be caused by severe loss of afferent light input to both eyes, caused by damage to the retina or optic nerve pathways, or samage at the tectum
of the midbrain, causing loss of pretectal light input to the Edinger-Westphal nucleus (part of the parasympathetic chain of pupillary innervation).
When the fish spotted the food, researchers detected calcium signals on the left (http://en.wikipedia.org/wiki/Midbrain_tectum) tectum
6 located in the roof of the midbrain, or mesencephalon 6 which disappeared when the spot was removed from view; in the video, you can see regions of the brain light up and then dim when the prey appears and disappears from view.
Rodriguez-Moldes, "Patterns of cell proliferation and cell death in the developing retina and optic tectum
of the brown trout," Developmental Brain Research, vol.