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BROWN, SASMORE, AND JONES 



Fig. 1. A. Godiva burro, 180 rad, loss of motor control of right ear 24 hours after 

 irradiation. B. Head irradiated, 485 r, pressing forward, tongue paralyzed, animal sur- 

 vived 30 hours. 



Fig. 2. Brain from head-irradiated burro, 485 r. Hemorrhage in subarachnoid 

 space in area of medulla and at base of cerebellum. A. Dorsal view. B. Ventral view. 



blood vessels, principally within the space of Virchow-Robin, but also 

 extending into the parenchyma. Hemorrhages in the subarachnoid spaces 

 of the cerebrum and cerebellum (Fig. 5) were difTuse and extended into 

 the perivascular spaces. 



In many head-irradiated animals there was considerable extravasation 

 of plasma into the Virchow-Robin space, often with extensions into the 

 parenchyma forming large irregular "plasma lakes" (Fig. 6). 



