How a macaque's brain knows it's swinging

Any organism with a brain needs to make decisions about how it's going to navigate through three-dimensional spaces. That's why animals have evolved sensory organs in the ears to detect if they're rotating or moving in a straight line. But how does an animal perceive curved motion, as in turning a corner? One explanation, published April 21 in Cell Reports, from researchers looking at macaques, is that curved motion is detected when sensory neurons in the brain receiving converging information about linear and rotational movement are activated.