Evoked Potentials
- Measures
cortical electrical signals generated in response to peripheral sensory
stimulation.
- Visual
(VERs), brainstem auditory (BAERs), and somatosensory (SSEPs)
- Used frequently intraoperatively for
spinal cord/facial nerve monitoring
- BAERs
- Brainstem
auditory evoked response (order in brainstem = SLIM)
- I –
Vestibulocochlear nerve
- II –
Cochlear nuclei
- III – Superior olivary nucleus
- IV –
Lateral lemniscus
- V –
Inferior colliculus
- VI –
Medial geniculate body
- VII –
Auditory cortex
- Modulaton
- Tensor
tympani – innervated by the trigeminal nerve
- Stapedius
– innervated by the facial nerve
- Reflex
mediated by the superior olivary nucleus