110 
Cruce 
LIZARD TN7 
LESION 
(Segment 1) 
CERVICAL 
(Segment 8) 
THORACIC 
(Segment 15) 
LUMBAR 
(Segment 26) 
CAUDAL 
(Segment 31) 
400 |i 
too 
Figure 3. A plot of axonal degeneration of representative levels of the lizard spinal cord following a 
complete hemisection at the first cord segment. Small drawings to the left show transversely cut axonal 
degeneration in the white matter. The large drawings to the right depict degeneration in the gray 
matter. Axonal terminals are not distinguished from preterminal debris and axons-of-passage. Repro- 
duced from Cruce (1975), Brain, Behavior, and Evolution, with permission of the publisher. 
