Search results
Results From The WOW.Com Content Network
The supraesophageal ganglion (also "supraoesophageal ganglion", "arthropod brain" or "microbrain" [1]) is the first part of the arthropod, especially insect, central nervous system. It receives and processes information from the first, second, and third metameres.
This page was last edited on 20 June 2016, at 21:11 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
The brain is in the head, encircling and mainly above the esophagus. It consists of the fused ganglia of the acron and one or two of the foremost segments that form the head – a total of three pairs of ganglia in most arthropods, but only two in chelicerates, which do not have antennae or the ganglion connected to them.
As part of the ventral nerve cord, it is connected (via pairs of connections) to the brain (or supraoesophageal ganglion) and to the first thoracic ganglion (or protothoracic ganglion). Its nerves innervate the sensory organs and muscles of the mouthparts and the salivary glands. Neurons in the suboesophageal ganglion control movement of the ...
Mushroom bodies visible in a Drosophila brain as two stalks. From Jenett et al., 2006 [1] The mushroom bodies or corpora pedunculata are a pair of structures in the brain of arthropods, including insects and crustaceans, [2] and some annelids (notably the ragworm Platynereis dumerilii). [3] They are known to play a role in olfactory learning ...
However, modern Homo sapiens have a smaller brain volume (brain size 1250 cm 3) than neanderthals; women have a brain volume slightly smaller than men, and the Flores hominids (Homo floresiensis), nicknamed "hobbits", had a cranial capacity of about 380 cm 3, about a third of the Homo erectus average and considered small for a chimpanzee.
The brains of arthropods and cephalopods arise from twin parallel nerve cords that extend through the body of the animal. Arthropods have a central brain, the supraesophageal ganglion, with three divisions and large optical lobes behind each eye for visual processing. [19]
The ventral nerve cord coordinates neural signaling from the brain to the body and vice versa, integrating sensory input and locomotor output. [1] Because arthropods have an open circulatory system , decapitated insects can still walk, groom, and mate — illustrating that the circuitry of the ventral nerve cord is sufficient to perform complex ...