"From this, the scientists were able to deduce that pterosaur brains were very bird-like, with reduced olfactory lobes and large optic lobes — suggesting that, like modern birds, they were more interested in what they could see than what they could smell
However, a surprising finding was that the pterosaur brains had two very pronounced balance-related regions called 'floccular lobes'. It is thought that these may have gathered information from the wing membranes, which functioned as sense organs, to enable the reptile to build up a detailed map of the forces experienced by its wings."
"The new findings confirm earlier studies4, 5 showing that pterosaurs had a remarkably bird-like brain — for example, it had reduced olfactory lobes and large, laterally displaced optic lobes."
"A study of pterosaur brain cavities using X-rays revealed that the animals (Rhamphorhynchus muensteri and Anhanguera santanae) had massive flocculi. The flocculus is a brain region that integrates signals from joints, muscles, skin and balance organs.
The pterosaurs' flocculi occupied 7.5% of the animals' total brain mass, more than in any other vertebrate. Birds have unusually large flocculi compared with other animals, but these only occupy between 1 and 2% of total brain mass.
The flocculus sends out neural signals that produce small, automatic movements in the eye muscles. These keep the image on an animal's retina steady. Pterosaurs may have had such a large flocculus because of their large wing size, which would mean that there was a great deal more sensory information to process."