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486 problems

Biomolecular condensate function

Cells concentrate molecules in membraneless compartments. What makes their changing composition and material behavior useful for particular tasks?

Mitotic spindle self-organization

Spindles organize filaments to separate chromosomes. How do chromosome-attached bundles integrate with the spindle’s collective organization?

Mammalian replication origins

Mammalian DNA replication can begin at many licensed sites. What determines which sites actually start copying in a given cell?

Granulophagy

Most stress granules disperse when stress ends. How does autophagy recognize and remove the granules that persist?

Visual crowding

A visible object can become hard to recognize when surrounded by other objects. Why does the arrangement of the whole scene change that interference?

Amodal completion

We perceive whole objects even when part is hidden. How does the brain combine visible geometry with knowledge of what the object might be?

Color constancy

An object can look similarly colored under different lighting. How do visual circuits separate surface color from illumination?

Binocular rivalry

When the eyes receive incompatible images, perception can alternate between them. How do eye and pattern competition produce those switches?

Working memory maintenance

We can hold information briefly after it disappears. Which neural processes keep it available for the next action?

Biological credit assignment

A behavioral outcome depends on many neurons. How does learning change the particular cells and connections responsible for it?

Interval timing

Brains judge durations and time actions over fractions of a second to seconds. How are those intervals represented and flexibly adjusted?

Attentional blink

A second target can be missed when it follows another by a few hundred milliseconds. How do processing and response competition create that brief limit?

Deep-tissue sound printing

Sound can form injected materials inside tissue. How can a printer keep its pattern in the right place as deep tissue moves?

Wearable cardiac ultrasound

Wearable ultrasound can track deep tissues. How can heart measurements stay calibrated when a flexible array bends and its contact changes?