Farb, N. A., Segal, Z. V., &Anderson, A. K. (2012). Attentional modulation of primary interoceptive and exteroceptive cortices. Cerebral cortex, 23(1), 114-126.
How exteroceptive attention (EA) alters neural representations of the external world is well characterized, yet little is known about how interoceptive attention (IA) alters neural representations of the body's internal state. We contrasted visual EA against IA toward respiration. Visual EA modulated striate and extrastriate cortices and a lateral frontoparietal “executive” network. By contrast, respiratory IA modulated a posterior insula region sensitive to respiratory frequency, ...