How the head governs the heart of fly species

Seeholzer et at. found that P1 has the same role in D. simutans. [...]the neural pathway that detects 7,11-HD and propagates the sensory input to P1 is structurally similar in D. metanogaster and D. simutans (Fig. 1). [...]comparing the structure and function of individual circuit components between species, in the haystack of neurons that makes up the brain, is uncharted territory. [...]the study highlights that integrative nodes in neural circuits such as P1 might be poised to accommodate evolutionary changes that underlie variations in behaviour.