Putamen

Overview

The bilateral putamen is a paired, subcortical gray matter structure located within the dorsal striatum of the basal ganglia, lateral to the globus pallidus and medial to the insular cortex, and is delineated in the MNI Structural maxprob thr25 1 mm atlas as a functionally homogeneous region involved primarily in motor and associative processing. Composed predominantly of medium spiny GABAergic projection neurons, the putamen receives dense excitatory input from primary and premotor cortices, supplementary motor area, and somatosensory cortices, and relays signals via the globus pallidus and substantia nigra to thalamic nuclei that project back to frontal cortical regions, thereby forming cortico‑striato‑thalamo‑cortical loops critical for movement initiation, motor learning, habit formation, and aspects of reward processing. Its activity is modulated by dopaminergic input from the substantia nigra pars compacta, and structural or functional alterations of the putamen are implicated in movement disorders such as Parkinson’s disease, dystonia, and Huntington’s disease, as well as in certain neuropsychiatric conditions. Putamen

The bilateral putamen, a key component of the dorsal striatum in the MNI Structural maxprob thr25 1 mm atlas, has been repeatedly implicated in genetic studies of neuropsychiatric and neurological traits, particularly through genome-wide association studies (GWAS) of subcortical brain volumes and disease risk. Large imaging-genetics consortia such as ENIGMA and UK Biobank have identified common variants in and near genes involved in neurodevelopment, synaptic function, and dopamine signaling (including regions near DCC, KTN1, GMNC, and others) that are associated with putamen volume and morphology. Putamen structure and function show genetic correlations with Parkinson’s disease, where variants in SNCA, LRRK2, and other dopaminergic pathway genes influence striatal vulnerability, and with Huntington’s disease, in which the HTT CAG expansion leads to prominent striatal (including putaminal) atrophy; polygenic risk for Parkinson’s and Huntington’s-related phenotypes often maps to networks including the putamen. GWAS of psychiatric traits such as schizophrenia, bipolar disorder, major depressive disorder, and obsessive–compulsive disorder have implicated risk loci (e.g., in CACNA1C, GRIN2A, DRD2 and other synaptic and receptor genes) whose downstream effects include altered cortico-striatal circuits encompassing the putamen, and imaging-genetic studies frequently find that higher polygenic risk scores for these conditions associate with differences in putamen volume or activation. In addition, genetic variants influencing substance use (e.g., in CHRNA5-A3-B4 for nicotine dependence and genes in dopaminergic reward pathways for alcohol and other drugs), impulsivity, and reward sensitivity show associations with putamen structure and function, consistent with its role in habit formation and reinforcement learning. Beyond psychiatric and movement disorders, GWAS of motor ability, reaction time, and general cognitive performance have reported shared genetic architecture with putamen volume, suggesting that variants affecting neurodevelopmental processes, axonal guidance, and synaptic plasticity contribute to individual differences in putamen anatomy and associated behavioral traits.

Overview generated by GPT-4o (2026).

Region ID: 7
Hemisphere: bilateral
Atlas: MNI Structural maxprob thr25 1mm

Putamen – Black Background (Full Brain)

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Putamen – White Background (Full Brain)

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Triplanar View – T1 Background

Triplanar View – Ghost Brain