Kinaesthesis, the sensing of body movement, which is essential for controlling activity, depends on registering the changes which accompany body movement. While there are two basic types of change—mechanical (articular, cutaneous, and vestibular) and visual—and so two potential sources of kinaesthetic information, the mechanical changes have traditionally been considered the basis of kinaesthesis, vision being considered a purely exteroceptive sense. J.J. Gibson, on the other hand, has argued that vision is a powerful kinaesthetic sense. To test this idea visual–mechanical kinaesthetic conflicts were created by moving the visible surroundings linearly forward and backward around a passively or actively moving subject. In most cases vision dominated. Therefore vision is not a purely exteroceptive sense, nor is visual kinaesthesis simply an adjunct to mechanical kinaesthesis. Vision is an autonomous kinaesthetic sense.

As infants with bronchopulmonary dysplasia (BPD) have difficulty maintaining adequate levels of oxygenation during rest, it was decided to investigate how the additional respiratory demands associated with nutritive feeding disrupt their breathing rates. The sucking and breathing patterns of six (three male, three female) preterm infants (between 23 and 29 weeks gestational age at birth), classified as having BPD were individually compared with the patterns observed in 12 (six male, six female) healthy term (control) infants (> or = 38 weeks gestational age at birth) with no known respiratory ailments. All infants were recruited from the neonatal unit at Simpson's Maternity Pavilion, Edinburgh, Scotland. In general, the breathing patterns recorded for the infants with BPD during the pause periods of intermittent feeding lacked the striking regularity observed in the term infants. It was found that the severity of the BPD affected breathing rates by significantly reducing the duration and the regularity of a breath (P<0.05) while sucking during the intermittent phase of feeding.

Two correlated random-dot Julesz patterns, that produce apparent lateral motion of a textured surface when flashed once in succession at an appropriate ISI, were flashed repetitively in temporal alternation. If the two ISI's in the stimulus sequence were each appropriate to apparent motion, perceived to-and-fro motion of the textured surface would be expected. It was found, however, that, when the two ISI's were sufficiently different, continuous unidirectional flow-motion was perceived, indicating that the visual system was effectively partitioning the stimulus sequence into a series of identical ‘phi-pairs’ on the basis of the shorter ISI. The temporal limits of the phenomenon were investigated. Binocular, binaural, and tactile analogues of this phenomenon of perceptual pairing of successive stimuli according to temporal proximity are discussed.