Nucleus · one in each half of the brain

Putamen

The shell-shaped hub where practiced movements become smooth, automatic habits.

The putamen is the outer part of the striatum and the basal ganglia's main hub for movement. It receives messages from the movement and touch areas of the cortex and helps start the right movement. With practice, it helps turn skills like typing or playing piano into automatic routines. It is the area hit hardest by the dopamine loss of Parkinson's disease.

Where it is

Deep in each half of the brain, just beneath the insula. It forms the outer layer of a lens-shaped block, with the globus pallidus nestled inside.

What it does

Launching movements

It helps start the movement you chose by picking which muscles to use and holding back the rest.

Skills on autopilot

With practice, it helps turn step-by-step actions into smooth, automatic routines.

Learning better moves

Dopamine signals here strengthen the movements that led to good results, fine-tuning your skills over time.

A map of the body

It holds a rough body map, with separate zones for different body parts, such as the hand and the leg.

Think of it as the muscle memory library, where well-practiced moves are stored so you can play them without thinking.

Works with

Motor stripSends it movement plans and gets the go-ahead back through the thalamus.
Primary somatosensory cortexFeeds it touch and body-position information to guide movement.
Globus pallidusSits just inside it and receives its output, the next step in the loop.
Substantia nigra pars compactaSupplies the dopamine that keeps its "go" signals flowing.
Caudate nucleusIts partner in the striatum, which handles more of the thinking side.
DopamineThe chemical whose loss here causes the slowness and stiffness of Parkinson's disease.

When it goes wrong

Parkinson's disease

The putamen loses its dopamine supply faster than the rest of the striatum. Movements become slow, small and stiff, and a resting tremor may appear.

Bleeding from high blood pressure

The putamen is the most common site of brain bleeds caused by long-term high blood pressure, which can weaken the opposite side of the body.

Wilson's disease

In this rare inherited condition, copper builds up in the body, including the putamen, causing tremor and stiffness. Lifelong treatment that removes copper can keep it under control.

For learning only, not medical advice. If you have a health concern, talk to a doctor.

Surprising facts

The putamen and globus pallidus together form a lens-shaped block called the lentiform nucleus ("lens-shaped" in Latin).
Practiced skills, like a gymnast's flips or a pianist's runs, become habits that play out with little thought, a process that leans heavily on the striatum, which includes the putamen.

Where the name comes from

From Latin "putamen", meaning "shell" or "husk", because it wraps around the globus pallidus like a shell around a nut.

Learn it in a lesson

The basal gangliaChoosing which movement goes. A short guided lesson in 3D.

Quick quiz

3 questions. Your answers are saved and come back in your daily review.

Which of these is a job of the putamen?
Show the answer
Launching movements. It helps start the movement you chose by picking which muscles to use and holding back the rest.
The putamen is part of which larger structure?
Show the answer
Basal ganglia. It belongs to the basal ganglia.
Which part fits this description? "Like the muscle memory library, where well-practiced moves are stored so you can play them without thinking."
Show the answer
Putamen. It is the putamen. The shell-shaped hub where practiced movements become smooth, automatic habits.

Sources

Neuroanatomy, Putamen, StatPearls, NCBI Bookshelf
Projections to the Basal Ganglia, Neuroscience (Purves et al.), NCBI Bookshelf
10.3 Our Brain Gets Involved - Responsibilities of Upper Motor Systems, OpenStax, Introduction to Behavioral Neuroscience

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Explore the putamen in 3D

Turn it around, zoom inside and see how it connects to the rest of the brain, then test yourself with quick quizzes.

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