Blurred vision with head movement is a common symptom reported by patients with vestibular dysfunction affecting the vestibulo-ocular reflex (VOR). Impaired VOR can be measured by comparing visual acuity in which there is no head movement to visual acuity obtained with head movement. A previous study demonstrated that dynamic visual acuity (DVA) testing using vertical head movement revealed def...

It was hypothesized that overt movement can either augment or inhibit certain cognitive activities depending on whether the movement has been positively associated with or negatively associated with that cognitive activity in the past. Seventy-two subjects who believed that they were testing headphone sets engaged in either vertical, horizontal, or no-instructed head movements while listening t...

PURPOSE There is little information regarding the characteristics of head movements during reading. This study was undertaken to investigate horizontal and vertical head movements during two different reading tasks. METHODS Head and eye movements were monitored with an infrared pupil and head tracker in 15 subjects during repeated reading of text from an A4-sized card and a card 90 degrees wi...

Perception of movement in acoustic space depends on comparison of the sound waveforms reaching the two ears (binaural cues) as well as spectrotemporal analysis of the waveform at each ear (monaural cues). The relative importance of these two cues is different for perception of vertical or horizontal motion, with spectrotemporal analysis likely to be more important for perceiving vertical shifts...

With the retinal image of a 35-minute circular target stabilized against horizontal eye movements, horizontal autokinesis is markedly reduced. It is suggested that this result is consistent with an eye movement interpretation of autokinetic movement, and further, that the response patterns reported here are similar to those that might be expected from recent work describing cortical single unit...

This paper discusses issues including tongue position, tongue movement space, constraint etc. of Mongolian word-initial consonants. The experimental result shows that word-initial consonant tongue horizontal movement space is constrained by constriction position and is in conformity with the rule that front consonant leads to smaller tongue movement space; higher consonant leads to smaller tong...