Neuroscience: Sex shapes brain-wide sensory activity.

Sex influences widespread and stimulus-dependent brain activity in Caenorhabditis elegans, with most sensory neurons exhibiting both dimorphic and non-dimorphic responses.

• Why it matters: Understanding sex differences in brain activity is crucial for revealing how biological sex shapes neural processing and behavior, yet the extent of these differences remains unclear.
• What they did: The study analyzed brain-wide responses to chemical stimuli in C. elegans, assessing responses across numerous sensory neurons to determine the prevalence and nature of sex differences.
• The result: Findings show that sex-dependent responses are extensive and vary with stimulus type, highlighting the complex and widespread influence of sex on neural activity in this organism.