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Megalencephaly (or macrencephaly; abbreviated MEG) is a growth development disorder in which the brain is abnormally large. It is characterized by a brain with an average weight that is 2.5 standard deviations above the mean of the general population. [2]
It is about 45 cm (18 in) long in men and around 43 cm (17 in) in women, ovoid-shaped, and is enlarged in the cervical and lumbar regions. The cervical enlargement, located from C3 to T2 spinal segments, is where sensory input comes from and motor output goes to the arms.
These ganglia form the basis for the peripheral nervous system’s (PNS) sensory and motor neurons that innervate various parts of the body. The vertebral segmentation is a process that forms a distinctive feature of the group. At first, somites form as a spherical epithelial structure with a central lumen lined by radially arranged cells.
Macrocephaly is a condition in which circumference of the human head is abnormally large. [1] It may be pathological or harmless, and can be a familial genetic characteristic. . People diagnosed with macrocephaly will receive further medical tests to determine whether the syndrome is accompanied by particular disorde
The zona limitans intrathalamica (ZLI) is a lineage-restriction compartment and primary developmental boundary in the vertebrate forebrain (which is analogous to the human cerebrum) that serves as a signaling center and a restrictive border between the thalamus (also known as the dorsal thalamus) and the prethalamus (ventral thalamus).
Strausfeld 2016 identifies the anteriormost part of the brain = labrum = acron with the archicerebrum, followed by an engrailed-bounded 'first segment', bearing appendicular eyes, which he terms the prosocerebrum. [7] Ortega-Hernández et al. (2017) [8] follow the same model as Strausfeld (2016), but switch the terms prosocerebrum and ...
MSNBC also remained a top 10 network, at No. 7 but up a more modest 4%. Despite its difficulties, CNN could still find solace at rising 20% and landing at No. 15. Also up 31% was Newsmax, although ...
A neurological disease refers to any ailment of the central nervous system, including abnormalities of the brain, spinal cord and other connecting nerve fibres. [8] Where millions of people are affected by neurological diseases on a worldwide scale, [8] it has been identified that the number of different types of neurological diseases exceeds six hundred, [9] any of which an individual can incur.