The lateral lemniscus is the main ascending hearing pathway in the brainstem. It carries fibres from the cochlear nuclei and superior olivary complex up through the pons to the inferior colliculus.
| Location | Lateral pons and lower midbrain |
|---|---|
| Parts |
|
| Connections | |
| Blood Supply | Superior cerebellar artery; Basilar artery branches |
Carries sound information from both ears towards the midbrain and auditory cortex.
Because each lateral lemniscus carries input from both ears, a one-sided lesion above the cochlear nuclei rarely causes deafness in one ear. Brainstem auditory evoked responses (wave IV-V) test this pathway.
Difficulty understanding sound despite normal hearing, from brainstem or higher pathway dysfunction.
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