Loss of speech comprehension following midbrain auditory system injury:
Injury in a skiing accident resulted in a "punctate
hematoma" affecting the inferior colliculi bilaterally
(top). Compare with the normal appearance of the
inferior colliculi (bottom). From Johkura et al. 1998.
The skier, whose MRI is shown here, was one of the
nine cases in which comprehension of spoken
language was lost following bilateral injury of the
inferior colliculi (follow links to abstracts, right).
Impact from the free edge of the cerebellar tentorium
was thought to have caused the skier's injury.
How much more serious such an
injury would be for an infant, who
has not yet begun to speak!
The inferior colliculi may play a special role in analysis of the acoustic features of speech.
Case reports of loss of speech comprehension
following bilateral injury of the inferior colliculi
in the midbrain auditory pathway: