Figure 1.

Frontal airflow triggers a change in a pigeon's behavioral state. A, Default state (air-off). B, Flight state (air-on). (Credit: Marcy Hartstein, MedPIC, Washington University School of Medicine, St. Louis, MO.) C, Recording electrode tracks for the 10-wire electrode array penetrating through the vestibular nuclei of four birds. Solid lines indicate the track of one array that had split into two clusters of electrodes during the penetration. Dashed lines indicate the approximate tracks from three other animals, based on histological verification. Cb, Cerebellum; Ld, dorsal lateral vestibular nucleus; Lv, ventral lateral vestibular nucleus; M, medial vestibular nucleus; S, superior vestibular nucleus.