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Confirmation Of Correlation Between Brain Nerve Conduction Velocity And Intelligence Level In Normal Adults, T. Reed, Philip Vernon, Andrew Johnson
Confirmation Of Correlation Between Brain Nerve Conduction Velocity And Intelligence Level In Normal Adults, T. Reed, Philip Vernon, Andrew Johnson
Andrew M. Johnson
In 1992, Reed and Jensen [Intelligence 16 (1992) 259–272] reported a positive correlation (.26; p=.002; .37 after correcting for restricted intelligence range) between a brain nerve conduction velocity (NCV) and intelligence level in 147 normal male students. In the first follow-up of their study, we report on a study using similar NCV methodologies, but testing both male and female students and using more extensive measures of cognitive abilities. One-hundred eighty-six males and 201 females, aged 18–25 years, were tested in three different NCV conditions and with nine cognitive tests, including Raven Progressive Matrices as used by Reed and Jensen. None …
Sex Difference In Brain Nerve Conduction Velocity In Normal Humans, T. Reed, Philip Vernon, Andrew Johnson
Sex Difference In Brain Nerve Conduction Velocity In Normal Humans, T. Reed, Philip Vernon, Andrew Johnson
Andrew M. Johnson
Nerve conduction velocity (NCV), the speed at which impulses travel along nerves, has been extensively determined in human peripheral nerves because of its clinical utility. In contrast, almost no studies have been made of human brain NCV. We determined brain NCVs in the visual nerve pathway for 185 male and 200 female university students ages 18-25 years. In each of three independent test conditions, we found that the mean NCV of male students is about 4% faster than in females (P < or = 0.0001 for each condition). These male students also have a shorter reaction time in each of seven …