Ci Rculatory- *4n-d Cerebral Ch~4~ges A4kd Protective Aids during Exp0st_tre T0 Acceleratory Forces”

Resuks derived from experiments carried out mainlv on small animals during the earlv part of t’he war have recentlv been reportkd (Pertzoff and Brittjon, 1945, l&K; I3ritton et nl., 1946 j. More partSicular inquiry into circulatory, cerebral a’nd other changes brought about by high accelerat,ions has been made in tlhtt past, three years and may now be discussed. It, demands no keen insight to visualize t)he need for more intimate knon-ledge of functional clisturbances referable to alcceleratory and deceleratory forces, witlh the present8 and immediately anticipated developments in aerial t’ravel. While high velocity mot’ion at uniform speed and direction does not give us phvsiological concern, bodily changes induced by stfarting and st)opping t;he physical machinery (perhaSps omewhat suddenly now and then), or changing the direction of movement+ may be of no small caliber.