Norepinephrine

Recent articles

Research image of locus coeruleus.

Brain’s blue spot possesses unexpected structure-function ties

The spatial arrangement of neurons in the locus coeruleus of mice corresponds with the cells’ targets across the brain, according to a new study.

By Holly Barker
25 May 2026 | 4 min read
Research image of astrocytes in the mouse brain.

Astrocytes in mouse amygdala encode emotional state

The glial cells’ activity reliably tracks with freezing, hesitancy and other behaviors reminiscent of anxiety.

By Holly Barker
24 March 2026 | 4 min read

Snoozing dragons stir up ancient evidence of sleep’s dual nature

Deep-sleep cycling between brain waves of higher and lower amplitude dates far back on the evolutionary tree, according to a new comparative study of mammals and reptiles.

By Lauren Schenkman
29 December 2025 | 0 min watch
Photograph of Floyd Bloom.

Remembering the life of neuropharmacologist Floyd Bloom

The co-author of the classic textbook “The Biochemical Basis of Neuropharmacology” and pioneer in studying the roles of neurotransmitters in the brain died on 8 January at 88 years old.

By Sydney Wyatt
24 January 2025 | 7 min read
Three sleeping mice.

Fleeting sleep interruptions may help brain reset

Brief, seconds-long microarousals during deep sleep “ride on the wave” of locus coeruleus activity in mice and correlate with periods of waste clearing and memory consolidation, new research suggests.

By Shaena Montanari
13 January 2025 | 5 min read
Illustration of a thermostat set to 22 point 5 degrees celsius, with a silhouette of a mouse adjusting its dial.

Mouse housing temperatures can cook experimental outcomes

Neuroscientists need to take note of how thermoregulatory processes influence the brain and behavior—for the sake of reproducibility and animal welfare.

By Caitlin James, Elizabeth Repasky, Sandra Sexton
5 November 2024 | 5 min read

Explore more from The Transmitter

Illustration of two cats jumping to opposite buildings in a city.

Is confidence a second thought—or part of the first one?

In some settings, neural circuits may calculate confidence in a decision simultaneously with the choice itself. That changes the types of questions researchers should ask.

By Ariel Zylberberg
5 October 2026 | 6 min read
Illustration of a plate with a cherry in front of a computer server.

What AI can learn from hunger

To enhance AI safety, take a lesson from biological brains; a small set of wants maintains durable control over a much larger cognitive system.

By Anthony Zador
5 October 2026 | 6 min read

New projectome captures ‘complex beast’ of serotonin system in mice

The whole-brain map—the first of its kind in a vertebrate—identifies five distinct neuron groups.

By Madeline Shaw
2 October 2026 | 0 min watch