Noradrenaline

Recent articles

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

The brain’s quiet conductor: How hidden cells fine-tune arousal

New research published today suggests that the pericoeruleus acts as a kind of micromanager of arousal, selectively inhibiting different subgroups of locus coeruleus neurons depending on the behavioral context.

By Mac Shine
7 May 2025 | 5 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

Explore more from The Transmitter

Susumu Tonegawa.

In memoriam: Susumu Tonegawa, ‘intellectual giant’

He won the Nobel Prize for his work on immunology and then went on to define the field of learning and memory.

By Claudia López Lloreda
17 July 2026 | 6 min read
Research image of mouse and human Purkinje cells.

Purkinje cells evolved to have increasingly complex architecture

An increasing proportion of the cerebellar neurons acquired multiple primary dendrites in humans and other apes, according to a comparison of 11 primate species.

By Siddhant Pusdekar
16 July 2026 | 5 min read