Results 261 to 270 of about 2,662,612 (298)
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Rockglacier Movement, Velocity, and Rheology
1996The movement of rockglaciers has caused quite a lot of speculation. Theoretically, a huge mass of debris can be moved by a number of different processes (Johnson 1987). A discussion of these various theoretical possibilities has to be based on information of measured velocities and on the geometry of the rockglacier movement.
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Water velocity shapes fish movement behavior
Journal of Fish BiologyAbstractStream and river ecosystems present fluvial fishes with a dynamic energy landscape because moving water generates heterogeneous flow fields that are rarely static in space and time. Fish movement behavior should be consistent with conserving energy in these dynamic flowing environments, but little evidence supporting this hypothesis exists ...
William D. Hintz +2 more
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The smoothness of unconstrained head movements is velocity-dependent
Human Movement Science, 2013Non-smooth, irregular movements reported in persons with neck pain have been suggested to signify motor impairment. However, irregular movements are additionally observed during slow movements in healthy participants. We therefore examined whether the smoothness of head movements is related to the movement speed in 26 healthy participants.
Harald, Vikne +4 more
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Response Velocity, Range of Movement, and Timing Accuracy
Perceptual and Motor Skills, 1994This study examined the relationship between variation in response velocity, range of motion, and temporal accuracy for 25 subjects executing stroking movements aimed to terminate coincidently with a moving stimulus arriving at a target. Analysis indicated that temporal accuracy improved with increasing velocity and decreasing range of movement.
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Voluntary Control of Smooth Eye Movements and their Velocity
Nature, 1972IT has been shown recently that the eyes can make sustained smooth eye movements indistinguishable from normal pursuit movements in the absence of a moving visual stimulus if an after-image is tracked1–3. This experimental procedure avoids the objections which can be raised against previous demonstrations of smooth eye movements without moving targets ...
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The coding of velocity of movement in the human visual system
Vision Research, 1984A very simple model of velocity perception which requires only 17 channels is outlined. The important points of the model are that: (1) in each direction of movement just two temporal frequency channels are necessary at any spatial frequency, (2) at low temporal frequencies the spatial frequency domain is encoded by many channels, but only those at low
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A role for the cerebellum in the control of limb movement velocity
Current Opinion in Neurobiology, 1998Accepting, rejecting or modifying the many different theories of the cerebellum's role in the control of movement requires an understanding of the signals encoded in the discharge of cerebellar neurons and how those signals are transformed by the cerebellar circuitry.
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Judgment and control of velocity in rapid voluntary movements
Experimental Brain Research, 1986Control of velocity in rapid flexion movements of the interphalangeal joint of the thumb was investigated by examining movement trajectories and patterns of activity in the extensor pollicis longus (EPL) and flexor pollicis longus (FPL) muscles. Although velocity was controlled with considerable accuracy, it was not sensed with the same precision ...
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Movement velocity and movement time as determiners of degree of preprogramming in simple movements.
Journal of Experimental Psychology, 1972R A, Schmidt, D G, Russell
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