What does striatum mean?
The striatum is a major component of the basal ganglia, a group of forebrain structures that helps regulate movement and supports learning, reward, and habit formation. Anatomically, it consists chiefly of the caudate nucleus and putamen, which are separated by bundles of nerve fibers. Dopamine acts strongly within this region, and abnormalities in striatal function or cell loss are associated with movement disorders such as Parkinson's disease. The term is also used when discussing reward prediction, reinforcement learning, and the gradual development of habits. In technical contexts, “striatal” is the corresponding adjective. Although the striatum is sometimes called the corpus striatum or neostriatum, these names should not be treated as referring to every part of the basal ganglia. Its name reflects the banded appearance produced by the pale fibers passing through the darker gray matter.
nounThe striatum is a large mass of gray matter in the forebrain forming part of the basal ganglia. It comprises the caudate nucleus and putamen and has major roles in motor control, learning, and habit formation.
- An anatomically distinct mass of gray matter in the forebrain, comprising the caudate nucleus and putamen and forming a major component of the basal ganglia.
"Damage to the striatum can cause involuntary movements and difficulty initiating voluntary actions."
"The neurotransmitter dopamine acts on several receptor systems within the striatum."
"Researchers studying the striatum have identified neural circuits involved in reward learning and habit formation."
The standard plural is strata. Anatomical usage may distinguish the two components as dorsal striatum and ventral striatum.
"The dorsal and ventral strata participate in different forms of learning and motivation."
Its name comes from its striped appearance: bundles of nerve fibers create visible bands of white matter through the striatum.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does striatum come from?
The term comes through Neo-Latin from Latin striatus, meaning “striated” or “marked with lines,” with the underlying root stria, “groove” or “furrow.” It was adopted in anatomical terminology for the conspicuous bands of white-fiber bundles running through the gray matter. Striate, striated, and striation belong to the same Latinate etymological family.
How striatum is actually used
This is a specialized anatomical term used chiefly in neuroscience, neuroanatomy, and clinical medicine. In discussions of the basal ganglia, it normally refers specifically to the caudate nucleus and putamen rather than to the entire basal ganglia.
Easily confused with striatum
A striatum is a particular forebrain structure, whereas a stratum is a layer or level within a larger group or formation.