We describe the case of a patient with pure verbal palinacousis and perseveration of inner speech after a right inferior temporal lesion. The superior temporal lobe, including the superior temporal sulcus and the interhemispheric connection between the 2 superior temporal lobes, explored by tractography, were preserved. These regions are involved in voice processing, verbal short-term memory and inner speech. It can then be hypothesised that abnormal activity in this network has occurred. Palinacousis and ‘palinendophonia', a term proposed for this symptom not previously reported, may be due to common cognitive processes disorders involved in both voice hearing and inner speech.

Keywords:
Palinacousis, Working memory, Inner speech, Palinendophonia, Superior temporal sulcus
1.
Jacobs L, Feldman M, Bender MB: Palinacousis of persistent auditory sensations. Trans Am Neurol Assoc 1971;96:123-126.
2.
Mohamed W, Ahuja N, Shah A: Palinacousis - evidence to suggest a post-ictal phenomenon. J Neurol Sci 2012;317:6-12.
3.
Bega D, Wang N, Klein JP: Reversible palinacousis from intracranial metastases. Neurohospitalist 2014;4:22-25.
4.
Fukutake T, Hattori T: Auditory illusions caused by a small lesion in the right medial geniculate body. Neurology 1998;51:1469-1471.
5.
Masson C, Sztern A, Cambier J, Masson M: [Palinacousis related to right temporo-parietal hemorrhage]. Presse Med 1993;22:596.
6.
Vercueil L, Klinger H: Loss of silent reading in frontotemporal dementia: unmasking the inner speech. J Neurol Neurosurg Psychiatry 2001;70:705.
7.
Vercueil L, Perronne-Bertolotti M: Ictal inner speech jargon. Epilepsy Behav 2013;27:307-309.
8.
Langland-Hassan P, Faries FR, Richardson MJ, Dietz A: Inner speech deficits in people with aphasia. Front Psychol 2015;6:528.
9.
Zhang L, Xi J, Xu G, Shu H, Wang X, Li P: Cortical dynamics of acoustic and phonological processing in speech perception. PLoS One 2011;6:e20963.
10.
Shergill SS, Bullmore ET, Brammer MJ, Williams SC, Murray RM, McGuire PK: A functional study of auditory verbal imagery. Psychol Med 2001;31:241-253.
11.
Li R, Qin W, Zhang Y, Jiang T, Yu C: The neuronal correlates of digits backward are revealed by voxel-based morphometry and resting-state functional connectivity analyses. PLoS One 2012;7:e31877.
12.
Hurschler MA, Liem F, Jäncke L, Meyer M: Right and left perisylvian cortex and left inferior frontal cortex mediate sentence-level rhyme detection in spoken language as revealed by sparse fMRI. Hum Brain Mapp 2013;34:3182-3192.
13.
Saito S, Baddeley A: Irrelevant sound disrupts speech production: exploring the relationship between short-term memory and experimentally induced slips of the tongue. Q J Exp Psychol A 2004;57:1309-1340.
14.
Patterson MC, Tomlinson FH, Stuart GG: Palinacousis: a case report. Neurosurgery 1988;22(6 pt 1):1088-1090.
© 2015 S. Karger AG, Basel
2015
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