Dictation: Blind People Sense Touch Faster
原文
On October 9th, we reported that cats born deaf develop enhanced vision. Now researchers find that blind people perceive touch faster than do those with sight. The work is in the Journal of Neuroscience. [Daniel Goldreich et al., citation to come.]
Volunteers who were sighted or who had varying levels of vision loss were asked to sense the movements of a small probe tapped against the tips of their index fingers. Everyone did well distinguishing light taps from stronger taps.
But when a light tap was followed almost instantly by a big, long-lasting vibration, those who had been blind since birth perceived each touch much better than did the sighted volunteers or those with only partial vision loss.
The researchers also varied the period between the tap and the vibration, and then measured the minimum separation time needed for participants to perceive the two separately. And congenitally blind people needed less time than anyone else. They were also the fastest Braille readers in the group.
The study suggests that the brain adapts to early blindness with a faster perception of touch. But the researchers admit that a lifetime of practicing Braille could also get the credit.
聽力
On octomber 9th, through report the cat born deaf developing hands regions. Now researchers find the blind people precive touch faster than those of sight. The work is on journal of neuroscience.
Volunteers would sight those who had very in level vision lost would ask the sense of movement of small probe tagged in the text in index fingure. Everyone did well distingulish lighter ype from stronger type. No wonder light types follow almost instantly by a big long-lasting vibration, those who have blind sense both of precive each touch better than the sighted-volunteer with those who only partial vision lost.
The researchers also vary the period between the tape and vibration and measure the minium separation time needed for perticipant to precive the tune separately. And congenally, blind people need the lest time than anyone else, they were also the faster grale people in the group.
THe study suggest the brain adapt to early blind would faster the preception touch, but researchers meet the lifetime would practice the brail can also get acquit.
On October 9th, we reported that cats born deaf develop enhanced vision. Now researchers find that blind people perceive touch faster than do those with sight. The work is in the Journal of Neuroscience. [Daniel Goldreich et al., citation to come.]
Volunteers who were sighted or who had varying levels of vision loss were asked to sense the movements of a small probe tapped against the tips of their index fingers. Everyone did well distinguishing light taps from stronger taps.
But when a light tap was followed almost instantly by a big, long-lasting vibration, those who had been blind since birth perceived each touch much better than did the sighted volunteers or those with only partial vision loss.
The researchers also varied the period between the tap and the vibration, and then measured the minimum separation time needed for participants to perceive the two separately. And congenitally blind people needed less time than anyone else. They were also the fastest Braille readers in the group.
The study suggests that the brain adapts to early blindness with a faster perception of touch. But the researchers admit that a lifetime of practicing Braille could also get the credit.
聽力
On octomber 9th, through report the cat born deaf developing hands regions. Now researchers find the blind people precive touch faster than those of sight. The work is on journal of neuroscience.
Volunteers would sight those who had very in level vision lost would ask the sense of movement of small probe tagged in the text in index fingure. Everyone did well distingulish lighter ype from stronger type. No wonder light types follow almost instantly by a big long-lasting vibration, those who have blind sense both of precive each touch better than the sighted-volunteer with those who only partial vision lost.
The researchers also vary the period between the tape and vibration and measure the minium separation time needed for perticipant to precive the tune separately. And congenally, blind people need the lest time than anyone else, they were also the faster grale people in the group.
THe study suggest the brain adapt to early blind would faster the preception touch, but researchers meet the lifetime would practice the brail can also get acquit.
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