Palinacousis—Evidence to suggest a post-ictal phenomenon

Palinacousis

“…In 11 cases (46%) in the literature, the auditory illusion is heard in the opposite auditory space or in the opposite ear to the cerebral lesion (Jacobs et al, 1973;Patterson et al, 1988;Auzou et al, 1995Auzou et al, , 1997Prueter et al, 2002;DiDio et al, 2007;Mohamed et al, 2012) (Table 25.1). In 2 (8%) documented cases the perseverated stimulus was heard ipsilateral to the lesion (Jacobs et al, 1973;Fukutake and Hattori, 1998).…”

“…Typically the voice is one of someone nearby. Most often a fragment of the original sentence is heard repeatedly (Jacobs et al, 1973;Auzou et al, 1995Auzou et al, , 1997Mohamed et al, 2012). The girl continued to hear "Eisenhower" repetitively over the next 10 minutes.…”

“…Rarely, palinacousis appears with a latency of minutes, hours, or days after the original stimulus (Jacobs et al, 1971;Kim et al, 2007;Mohamed et al, 2012). In one case described by Jacobs et al (1973), the patient heard the perseverated sound 24 hours after the original stimulus.…”

“…Lastly, although not always performed exactly at the time patients were experiencing palinacousis, EEG data often revealed an abnormal focus (Jacobs et al, 1971;Bekeny and Peter, 1972;Malone and Leiman, 1983;Patterson et al, 1988;Masson et al, 1993;Auzou et al, 1995Auzou et al, , 1997Prueter et al, 2002;DiDio et al, 2007;Kim et al, 2007;Mohamed et al, 2012;Bega et al, 2014) (Table 25.1). This abnormal focus consisted of focal slowing, spikes, or sharp waves.…”

A New Symptom, ‘Palinendophonia', Associated with Pure Verbal Palinacousis Induced by a Right Inferior Temporal Lesion

“…It is usually described following a left temporal lesion, frequently of tumoral or vascular origin. Seizures or post-ictal mechanisms are most often reported [2] . Only 2 cases have been described with right-sided lesions in the median geniculate body [4] and the temporo-parietal junction [5] and 1 case with bilateral temporo-parietal lesions [3] .…”