Arnold's nerve, also referred to as the auricular branch of the vagus nerve, is involved in providing sensation to the skin of the ear canal, tragus, tympanic membrane, and auricle. This nerve arises from the superior ganglion of the vagus nerve and receives contributions from the glossopharyngeal nerve. It traverses the temporal bone and communicates with the facial nerve, playing a role in the 'Arnold's ear-cough reflex,' wherein stimulation of the external auditory meatus can trigger a cough response in some individuals[2][3].
Additionally, Arnold’s nerve is significant in relation to certain medical conditions, including Arnold's neuralgia, which involves irritation of the greater occipital nerve, leading to headaches in the occipital area of the head[4]. The nerve's stimulation may also be associated with chronic cough syndromes, revealing its connection to vagal function and sensory neuropathies[6].
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