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Textiles and manufacturing. 1  Spindle (textiles), a device to spin fibers into thread. 2  Spindle (tool), a rotating axis of the machine, which often has a shaft at its heart. 3  Segmented spindle, a spindle consisting of discrete elements that can be assembled and disassembled on the fly.
Sleep spindles closely modulate interactions between the brain and its external environment; they essentially moderate responsiveness to sensory stimuli during sleep. Recent research has revealed that spindles distort the transmission of auditory information to the cortex; spindles isolate the brain from external disturbances during sleep.