22 October 1999
Vol 286, Issue 5440

About The Cover

Cover image expansion

COVER The olfactory bulb of a mouse (image width, 0.5 mm). Axons of olfactory sensory neurons terminate in globose structures, glomeruli, of which there are 1800 per bulb. The vomeronasal nerve carrying pheromone information terminates separately in a diffuse structure, the accessory olfactory bulb (top). Olfactory neurons can be stained blue in this strain of genetically manipulated mice. For recent advances in olfaction, see the special section beginning on p. 703 [Photo: P. Mombaerts]