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A neural correlate between aggressive behaviour and mating has been found. This involves a set of neurons in the ventromedial hypothalamus that are active during fighting and suppressed during mating.
The growth cones of developing axons are guided towards their targets by gradients of cues. Kamiguchi and colleagues propose a mechanism for this process whereby cues trigger an alteration in the balance of endocytosis and exocytosis on one side of the growth cone, biasing the direction of turning.
Vesicular glutamate transporters are expressed not only in glutamate neurons but also in monoamine, acetylcholine and, intriguingly, GABA neurons. Trudeau and colleagues discuss the role of these transporters in glutamate co-release and vesicular synergy — a process leading to enhanced packaging of the 'primary' transmitter.
Various proposals have defined the dorsal visual stream as a 'Where' or 'How' pathway. Synthesizing data from anatomical and functional studies, Mishkin and colleagues propose that in the posterior parietal cortex, three different pathways emerge from the dorsal stream, each supporting a different aspect of spatial processing.
Although inter-individual differences in performance are often considered to be 'noise', recent data show that they are linked to structural differences. Kanai and Rees argue that studying these links can help in understanding how structural variation influences the functional capacity of brain regions.
