ventral root

any of the spinal roots that carry motor nerve fibers and arise from the spinal cord on the front surface of each side. Also called anterior root; motor root. Compare dorsal root. See also Bell–Magendie law.

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Psychology term of the day

January 19th 2025

homoplasy

n. a similarity of form in bodily structures of species that are not descended from a common ancestor (e.g., the body forms of a tuna and a dolphin). This superficial resemblance often arises through the process of convergent evolution because the species live in the same environment. Compare homology. See also analogy. —homoplastic adj.