Which physical examination finding is common in patients with vertigo?

Horizontal nystagmus is a common physical examination finding in patients experiencing vertigo. Nystagmus refers to rhythmic oscillations of the eyes, and in the case of horizontal nystagmus, the movements are typically side to side. This condition often occurs due to vestibular dysfunction and can be indicative of peripheral or central causes of vertigo. The presence of horizontal nystagmus can help healthcare providers differentiate between potential causes of vertigo and guide further diagnostic and management strategies.

In comparison, pupil dilation, absence of reflexes, and increased heart rate are not specific indicators of vertigo. These findings are associated with other neurological or systemic conditions rather than directly reflecting the vestibular system's function, making them less relevant in the context of diagnosing the cause of vertigo.