Skip to main content

Table 1 Percentages of right- and left-handers with speech localised predominantly in the left, right hemisphere, or bilaterally, according to different studies and techniques

From: Electroconvulsive therapy and determination of cerebral dominance

Study

Right-handers

Left-handers

 

Left

Bilateral

Right

Left

Bilateral

Right

Milner, 1975*

96

0

4

70

15

15

Rossi & Rosadini, 1967*

99

1

0

40

10

50

Pratt & Warrington, 1972#

99

0

1

-

-

-

Warrington & Pratt, 1973#

-

-

-

70

7

23

Geffen et al., 1978#

92

0

8

67

0

33

Geffen & Traub, 1979‡

84

9

7

61

15

24

Springer et al. 1999&

94

6

0

-

-

-

Pujol et al. 1999&

96

4

0

76

14

10

Szaflarski et al. 2002&

-

-

-

78

14

8

Hund-Georgiadis et al. 2002&

94

0

6

47

12

41

Knecht et al. 2000†

-

-

4

-

-

27

  1. * intracarotid sodium amytal test
  2. # ECT
  3. ‡ dichotic listening test
  4. &fMRI
  5. † fTCD