Studies in Rheoencephalography (REG)

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Fig. 12

Fig.13

Fig.14

Fig.15

Fig.16

Fig.17

Fig.18

Fig.19

Fig.20

Fig.21

Fig.22

Fig.23

Summary of REG studies (1975-2010) and REG devices used. Legend: Metal fragment study involved in vitro and in vivo measurements. Several hundred Cerberus measurements were excluded from this list since there was no data processing and/or Medline accessible publication. Spreading dep: depression; * Challenges were: 30 sec breath holding, hyperventilation, CO2 inhalation, Valsalva maneuver, Trendelenburg, inverted Trendelenburg position, and Exer-Rest shaking [59].

Numeric characteristics of REG anacrotic time and age. REG samples were analyzed dividing into subgroups according to age: young (17-28) and old (42-55). * p-values of difference between young and old group.

Comparison of 5 types of data processing by their regression lines. Correlation coefficient (R2) represents the strength of relationship between independent variable (Voltage) and dependent variables 1-5; intercept was set to 0.0; Hjorth A: activity, represents amplitude.

Comparison of Doppler flow and electrical impedance during low and high flow rates. The effects of increased flow rate were comparable between Doppler and Impedance when the impedance derivations were calculated.