The brainstem auditory
pathway is myelinated
earlier in the human
fetus than any other
circuit of the brain,
and essential for
learning to speak.
Midbrain:
ICol  -- Inferior colliculus
SCol -- Sperior colliculus
Lower brainstem auditory nuclei:
TzB -- Trapezoid body
SOl --  Superior olive
(from Yakovlev & Lecours, 1967, with permission
from Blackwell Scientific Publications).
1     2     3     4     5     6     7     8     9    10    11    12   13    14    15    16
Notes
FNPS 2006


midbrain
pons
cerebellum
midbrain
medulla