Which of the following tests is least likely to be affected by elevated intracranial pressure?

Cortical somatosensory evoked potentials (SSEPs) are known to be less sensitive to the effects of elevated intracranial pressure compared to the other tests listed. Elevated intracranial pressure can impact brain function and the physiological mechanisms behind many neurophysiological tests. For instance, EEG readings can show changes such as slowing or abnormal wave patterns, reflecting alterations in the brain's electrical activity due to increased pressure.

Visual evoked potentials may also be influenced as they are dependent on the integrity of the visual pathways, which can be compromised under conditions of elevated intracranial pressure. Similarly, somatosensory evoked potentials can be affected, as they assess the response to tactile stimuli relayed through the nervous system, which can be altered by pressure changes in the cranium.

In contrast, cortical SSEPs are generally more resilient to these pressure changes because they primarily evaluate the integrity of the somatosensory pathways and may not directly reflect acute physiological alterations caused by elevated intracranial pressure. Thus, their response is less likely to be impacted in the context of increased intracranial pressure, making them the least affected among the tests listed.