Change of somatosensory function of the tongue caused by chorda tympani nerve disorder after stapes surgery

Maeda, Emi; Katsura, Hirokazu; Nin, Tomomi; Sakaguchi-Fukunaga, Akiko; Mishiro, Yasuo; Sakagami, Masafumi

doi:10.1002/lary.26598

Cited by 21 publications

(15 citation statements)

References 25 publications

(42 reference statements)

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“…Patients who also complain of tongue numbness are sometimes seen after middle ear surgery. The incidences of tongue numbness were 31.5% in the CTN‐preserved group, 63.3% in the CTN‐sectioned group, and 33.3% in the CTN‐preserved group that underwent stapes surgery, suggesting that these incidences were higher than we thought. Tongue numbness is considered a symptom of a somatosensory disorder.…”

Section: Introductionmentioning

confidence: 56%

“…There were 46 cases with preservation of the CTN and 13 cases with sectioning of the CTN. In addition, 106 adult patients were compared with the pediatric patients, and they were included in the previous study . Of the 106 cases, 44 had cholesteatoma; 34 had chronic otitis media; and 28 had noninflammatory middle ear disease.…”

Section: Methodsmentioning

confidence: 99%

“…There has been no report concerning the changes in somatosensory function in pediatric patients under the normal or the postoperative condition because a clinical examination of somatosensory function of the tongue has not yet been established. Our previous study reported that the somatosensory thresholds were significantly increased in patients who complained of tongue numbness after stapes surgery using a 2‐point discriminator and an electrostimulator, whereas they were not significantly elevated in patients who did not complain of tongue numbness.…”

Section: Introductionmentioning

confidence: 94%

“…There have been many studies of the change in taste function caused by damage to the chorda tympani nerve (CTN) during middle ear surgery. They reported that taste function was impaired in 22% to 66.7% of the patients . Patients who also complain of tongue numbness are sometimes seen after middle ear surgery.…”

Section: Introductionmentioning

confidence: 99%

“…There have been a few reports of the changes in lingual trigeminal sensitivity after middle ear surgery. They reported that somatosensory function deteriorated on the affected side after middle ear surgery . It is generally thought that pediatric patients complain of postoperative taste function less frequently than adult patients .…”

Section: Introductionmentioning

confidence: 99%

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Earlier recovery of lingual dysfunction after middle ear surgery in pediatric versus adult patients

et al. 2019

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Objectives It is generally thought that the recovery of damaged chorda tympani nerve (CTN) function after middle ear surgery is different in pediatric patients from that in adult patients. The purpose of this study was to investigate the changes and the progress of taste and somatosensory functions of the tongue after middle ear surgery in pediatric patients compared with those of adult patients. Study Design Prospective study. Methods Fifty‐nine pediatric patients and 106 adult patients underwent middle ear surgery. Taste and somatosensory functions of the anterior tongue, the so‐called CTN functions, were assessed using electrogustometry (EGM), a 2‐point discriminator, an electrostimulator, and a questionnaire before and 2 weeks and 6 months after surgery. Results Two weeks after surgery, there was no significant difference in the incidence of dysgeusia and abnormal EGM thresholds between the patient groups. The incidence of tongue numbness was significantly lower in pediatric patients than in adult patients regardless of CTN manipulation. Although the lingual somatosensory thresholds of adult patients were significantly increased, those of pediatric patients were not increased. Six months after surgery, the incidences of dysgeusia and an abnormal EGM threshold were lower in pediatric patients than in adult patients. Tongue numbness disappeared, and the thresholds of lingual somatosensory tests returned to normal in most pediatric patients. Conclusion Not only taste function but also lingual somatosensory function was damaged after middle ear surgery even in pediatric patients. Pediatric patients complained of tongue numbness less frequently and showed earlier recovery than adult patients. Level of Evidence 2 Laryngoscope, 130:1016–1022, 2020

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Section: Introductionmentioning

confidence: 56%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Earlier recovery of lingual dysfunction after middle ear surgery in pediatric versus adult patients

et al. 2019

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Oral Somatosensory Sensitivity in Patients With Taste Disturbance

et al. 2021

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Objective The significance of the human sense of taste is typically underestimated until it is altered or even lost. Hypogeusia, a diminished capacity to taste, has an adverse influence on a patient's quality of life. Similar to interactions between the oral senses and between olfaction and intranasal trigeminal sensitivity, taste disturbance may also affect the mechanosensitivity of the tongue. In this study, we investigated the lingual tactile sensitivity of patients with subjective taste disturbance and people with normogeusia. Study Design Prospective case‐control study. Methods Forty‐six patients with subjective taste disturbance (mean age 60 years) and 43 participants with normogeusia (mean age 55 years) were enrolled and underwent a stereognostic test of edge and point sensitivity based on 3D‐printed letters sized from 2 to 8 mm. Gustatory function and salivary production were also tested. Results Patients with dysgeusia needed significantly bigger letters to recognize them compared with controls (P = .01). Apart from this, patients with dysgeusia had no significant association between gustatory function and salivary production. Duration of dysgeusia and age were not associated with the presently obtained measures of gustatory or oral mechanosensory function. Conclusions The results of this study indicate that taste dysfunction has a negative impact on oral mechanosensitivity and hence possibly on oral texture perception. Level of Evidence 3 Laryngoscope, 131:2572–2577, 2021

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Acute Taste Dysfunction in Oropharyngeal Cancer Patients after Transoral Robotic Surgery

et al. 2023

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ObjectivesTo compare taste changes after transoral robotic surgery (TORS) to taste changes in healthy controls.MethodsOropharyngeal cancer patients receiving TORS and healthy controls were recruited. Participants underwent posterolateral and whole‐mouth psychophysical taste testing (identification, intensity, and hedonics) at baseline and at 2 weeks postoperatively (patients) or follow‐up (controls). Surgeons reported suspension time and glossopharyngeal nerve injury (GNI) based on the identification and sacrifice of the nerve. A Clinical Global Impression (CGI) of taste symptoms was completed at each session (“My sense of taste bothers me” on a 5‐point scale from Never [1] to Always [5]). A taste disorder (TD) was a CGI of 3 (Sometimes) or worse. Within‐subject changes in CGI and psychophysical scores were computed. “Worsened taste” was a CGI increase by ≥1 point at follow‐up.ResultsOf 69 participants, most (33/37 tumor, 31/32 controls) had normal baseline taste (CGI < 3). 14/33 (42%) TORS patients and no controls developed new TDs at follow‐up. More smokers (7/9) had worsened taste than nonsmokers (19/60, difference = 46% [95% CI 16%–76%]). More patients without GNI (6/22) than with GNI (0/15) had postoperative phantogeusia (difference = 27% [95% CI 9–45%]). Tumor‐ipsilateral taste identification (TI) decreased more in patients (−11.3%) than controls (0.8%, difference = 12.2% [95% CI 5.0–19.3%]). Suspension time was not associated with worsened taste symptoms or psychophysical changes.ConclusionsPatient‐reported taste changes after TORS are frequent. Compared to healthy controls, TORS patients have decreased tumor‐ipsilateral TI. Suspension time and GNI are unlikely to cause symptomatic TDs. Further investigations of the etiology and long‐term symptom burden of TORS‐associated TDs will aid in the management of oropharyngeal cancer patients.Level of EvidenceLevel 3 (non‐randomized controlled cohort study) Laryngoscope, 2023

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Change of somatosensory function of the tongue caused by chorda tympani nerve disorder after stapes surgery

Abstract: 4. Laryngoscope, 128:701-706, 2018.

Cited by 21 publications

References 25 publications

Earlier recovery of lingual dysfunction after middle ear surgery in pediatric versus adult patients

Earlier recovery of lingual dysfunction after middle ear surgery in pediatric versus adult patients

Oral Somatosensory Sensitivity in Patients With Taste Disturbance

Acute Taste Dysfunction in Oropharyngeal Cancer Patients after Transoral Robotic Surgery

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