Figure 5 : Relationships between paradoxical sleep and slow wave
(Crosses) Cats that have undergone sham operations; the values for slow-wave
sleep and paradoxical sleep are normal. (Black dots) Cats with the raphe
system totally or partially destroyed. Note that paradoxical sleep occurs
only if the amount of slow-wave sleep is greater than 15 percent. (Triangles)
Cats with total bilateral destruction of the nucleus locus coeruleus.
Values for slow-wave sleep are normal; paradoxical sleep is com pletely