Optic nerve hypoplasia (ONH) is a congenital condition in which the optic nerve is underdeveloped (small). Many times, de Morsierâs Syndrome or septo-optic dysplasia (SOD) is associated with ONH, however, it is possible to have ONH without any additional issues like SOD.
Pyramidal neurons (pyramidal cells) are a type of neuron found in areas of the brain including cerebral cortex, the hippocampus, and in the amygdala.Pyramidal neurons are the primary excitation units of the mammalian prefrontal cortex and the corticospinal tract.eatures Edit. One of the main structural features of the pyramidal neuron is the triangular shaped soma, or cell body, after which the neuron is named. Other key structural features of the pyramidal cell are a single axon, a large apical dendrite, multiple basal dendrites, and the presence of dendritic spines.
Star-shaped glial cells in the CNS are collectively known as astrocytes. 'Astro' implies 'star' and 'cyte' refers to 'cell'. Hence, we get 'astrocyte': a star-shaped cell. These glial cells are responsible for a lot of important things in the central nervous system; most notably, they are part of the blood-brain barrier. Tiny little feet leave the astrocyte and help to encircle the vessels that make up the blood-brain barrier, which is a barrier that helps to prevent undesirable substances from entering the brain via blood vessels.