fMRI tracks monkey 'voice' area

Nature Neuroscience pp 367 – 374

fMRI scanning, rarely used in non human primates, has been used to support the idea of a 'voice' area in rhesus monkeys. The technique tracks changes in blood flow as a measure of neural activity, and although it is common in human studies, the need to keep subjects still during the experiment makes it challenging to use on awake animals. In the study published this week in Nature Neuroscience, Christopher Petkov and colleagues were able to track neural activity in two monkeys as they heard sounds produced by their own species, sounds produced by other animals (including other primate species), natural sounds (such as thunder), and scrambled versions of all of these sounds. A region in the anterior superior temporal cortex was found to be activated more strongly in response to sounds from the monkeys' own species than to the other sounds. This finding suggests that monkeys, like humans, may have brain areas specialized for processing species-specific vocalizations.

Imaging study in humans have identified a voice-sensitive area in the brain, but previous attempts to find a similar area in monkeys have produced conflicting results, which had led to the suggestion that such a voice-sensitive area might be specific to humans.

Explore future extreme media