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Bahia MM, Lowell SY. Evaluating Anterior and Posterior Oral Tongue Contributions to Pressure Generation: A Comparison Between Regular and Effortful Saliva Swallows. AMERICAN JOURNAL OF SPEECH-LANGUAGE PATHOLOGY 2024; 33:1406-1419. [PMID: 38416052 DOI: 10.1044/2024_ajslp-23-00289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
PURPOSE This study determined the contributions of the anterior and posterior tongue regions in tongue pressure generation during regular saliva swallows (SSs) and effortful swallows (ESs) completed under two different instructions. The association between tongue pressure and perceived effort to swallow was also examined. METHOD Forty healthy adults without swallowing disorders participated in this study, divided into two age groups: 20 younger (Mage = 21.95 years, SD = 4.43) and 20 older (Mage = 70.10 years, SD = 4.30). Simultaneous data acquisition involved submental surface electromyography, tongue manometry, and a visual analog scale across swallowing conditions (SS, ES with tongue emphasis, and ES with pharyngeal squeezing). The main outcome measures were tongue pressure during swallowing and perceived effort to swallow. RESULTS Overall tongue pressure during ESs with tongue emphasis and with pharyngeal squeezing was greater than that during SSs (R2 = .78, p < .001). Moreover, tongue pressure during the ES with tongue emphasis was greater than that during the ES with pharyngeal squeezing (t = 25.63, p < .001). The posterior tongue region generated more pressure during SSs (R2 = .64, p < .001) and the ES with tongue emphasis (R2 = .55, p < .001) than the anterior tongue. Finally, a positive correlation was found between perceived effort and tongue pressure during swallowing (r = .75, 95% CI [0.72, 0.77]). CONCLUSIONS Tongue pressure generation was affected by the type of instruction used to elicit ESs, and the posterior tongue showed relatively greater pressure contributions than the anterior tongue for ESs with tongue emphasis and SSs. Furthermore, age-related declines in pressure generation during swallowing were not evidenced in this study, underscoring the ability of healthy older individuals to appropriately modulate lingual pressure during ESs. Last, our results showed that the visual analog scale is a simple tool for rating swallowing effort during ESs, supporting its potential clinical use to train ESs.
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Affiliation(s)
- Mariana M Bahia
- Department of Communication Sciences and Disorders, Syracuse University, NY
| | - Soren Y Lowell
- Department of Communication Sciences and Disorders, Syracuse University, NY
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2
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Cullins MJ, Connor NP. Differential impact of unilateral stroke on the bihemispheric motor cortex representation of the jaw and tongue muscles in young and aged rats. Front Neurol 2024; 15:1332916. [PMID: 38572491 PMCID: PMC10987714 DOI: 10.3389/fneur.2024.1332916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 03/04/2024] [Indexed: 04/05/2024] Open
Abstract
Introduction Dysphagia commonly occurs after stroke, yet the mechanisms of post-stroke corticobulbar plasticity are not well understood. While cortical activity associated with swallowing actions is bihemispheric, prior research has suggested that plasticity of the intact cortex may drive recovery of swallowing after unilateral stroke. Age may be an important factor as it is an independent predictor of dysphagia after stroke and neuroplasticity may be reduced with age. Based on previous clinical studies, we hypothesized that cranial muscle activating volumes may be expanded in the intact hemisphere and would contribute to swallowing function. We also hypothesized that older age would be associated with limited map expansion and reduced function. As such, our goal was to determine the impact of stroke and age on corticobulbar plasticity by examining the jaw and tongue muscle activating volumes within the bilateral sensorimotor cortices. Methods Using the middle cerebral artery occlusion rat stroke model, intracortical microstimulation (ICMS) was used to map regions of sensorimotor cortex that activate tongue and jaw muscles in both hemispheres. Young adult (7 months) and aged (30 months) male F344 × BN rats underwent a stroke or sham-control surgery, followed by ICMS mapping 8 weeks later. Videofluoroscopy was used to assess oral-motor functions. Results Increased activating volume of the sensorimotor cortex within the intact hemisphere was found only for jaw muscles, whereas significant stroke-related differences in tongue activating cortical volume were limited to the infarcted hemisphere. These stroke-related differences were correlated with infarct size, such that larger infarcts were associated with increased jaw representation in the intact hemisphere and decreased tongue representation in the infarcted hemisphere. We found that both age and stroke were independently associated with swallowing differences, weight loss, and increased corticomotor thresholds. Laterality of tongue and jaw representations in the sham-control group revealed variability between individuals and between muscles within individuals. Conclusion Our findings suggest the role of the intact and infarcted hemispheres in the recovery of oral motor function may differ between the tongue and jaw muscles, which may have important implications for rehabilitation, especially hemisphere-specific neuromodulatory approaches. This study addressed the natural course of recovery after stroke; future work should expand to focus on rehabilitation.
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Affiliation(s)
- Miranda J. Cullins
- Department of Surgery, University of Wisconsin-Madison, Madison, WI, United States
| | - Nadine P. Connor
- Department of Surgery, University of Wisconsin-Madison, Madison, WI, United States
- Department of Communication Sciences and Disorders, University of Wisconsin-Madison, Madison, WI, United States
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3
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Jeannin C, Perrier P. Pressure sensor calibration using a water-filled latex finger to account for the mechanical interaction between the hard palate and the deformable human tongue. Med Eng Phys 2023; 120:104036. [PMID: 37838410 DOI: 10.1016/j.medengphy.2023.104036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 07/31/2023] [Accepted: 08/06/2023] [Indexed: 10/16/2023]
Abstract
We present a calibration system called Dried Water Column (DWC). It applies pressure on a sensor with a latex finger filled with water, which pressure is controlled with a water column. This is intended to mimic the way the deformable tongue mechanically interacts with the hard palate. We show that, once some specificities of the elastic/plastic behavior of the latex finger are taken into account, namely the softening due to Mullins Effect and the non-elastic deformation occurring above a certain pressure level, the DWC provides a reliable measure of the linear relation between the pressure and the output voltage of the sensor within the limited pressure range [0, 2.5 kPa]. Such a precise calibration would not be possible with a rigid actuator, which position on the sensor can dramatically influence the measures. Extrapolating the linear relationship thus determined to a larger pressure range compatible with speech production and swallowing ([0, 35 kPa]), is possible once it has been verified that the behavior of the sensor is linear over this pressure range. This can be done with any rigid or semi rigid actuator. This reliable calibration procedure can be easily reproduced in any laboratory, and can be applied to any pressure sensor.
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Affiliation(s)
- Christophe Jeannin
- Laboratoire des Multimatériaux et Interfaces (LMI), UMR CNRS 5615, Université Claude Bernard Lyon 1, Villeurbanne, France; Hospices Civils de Lyon, Lyon, France.
| | - Pascal Perrier
- Université Grenoble Alpes, CNRS, Grenoble INP, GIPSA-lab, 38000, Grenoble, France
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Robison R, DiBiase L, Wymer JP, Plowman EK. Functional Lingual Pressure Thresholds for Swallowing Safety and Efficiency Impairments in Amyotrophic Lateral Sclerosis. Dysphagia 2023; 38:676-685. [PMID: 35907088 PMCID: PMC10228623 DOI: 10.1007/s00455-022-10499-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 07/11/2022] [Indexed: 11/25/2022]
Abstract
Although reductions in lingual strength are reported in individuals with amyotrophic lateral sclerosis (ALS) that are associated with dysphagia; determination of a functional lingual pressure threshold (FLPT) has not yet been established. The present study therefore sought to identify an FLPT for impaired swallowing safety and efficiency in individuals with ALS.Thirty individuals with ALS completed a standardized videofluoroscopic swallowing examination and maximum anterior isometric lingual pressure testing using the Iowa Oral Performance Instrument. Duplicate, blinded ratings of the validated Penetration-Aspiration Scale (PAS) scores and Analysis of Swallowing Physiology: Events, Kinematics and Timing (ASPEKT) were performed. Binary classifications of safety (unsafe: PAS: ≥ 3) and efficiency (inefficient: ≥ 3% worst total pharyngeal residue) were derived. Descriptives and receiver operating characteristic curve analyses (AUC, sensitivity, specificity) were performed.Unsafe and inefficient swallowing were instrumentally confirmed in 57% and 70% of ALS patients, respectively. Across the entire cohort, the mean maximum lingual physiologic capacity was 32.1 kilopascals ('kPa'; SD: 18.1 kPa). The identified FLPT for radiographically confirmed unsafe swallowing was 43 kPa (sensitivity: 94%, specificity: 62%, AUC 0.82, p = 0.003). FLPT for inefficient swallowing was 46 kPa (sensitivity: 86%, specificity: 56%, AUC = 0.77, p = 0.02).These data provide preliminary FLPT data in a small cohort of individuals with ALS that need to be further investigated in larger cohorts to inform clinical screening practices.
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Affiliation(s)
- Raele Robison
- Aerodigestive Research Core, University of Florida, Gainesville, FL, USA.
- Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA.
| | - Lauren DiBiase
- Aerodigestive Research Core, University of Florida, Gainesville, FL, USA
| | - James P Wymer
- Department of Neurology, University of Florida, Gainesville, FL, USA
| | - Emily K Plowman
- Aerodigestive Research Core, University of Florida, Gainesville, FL, USA
- Department of Neurology, University of Florida, Gainesville, FL, USA
- Speech, Language and Hearing Science Department, University of Florida, Gainesville, FL, USA
- Department of Surgery, University of Florida, Gainesville, FL, USA
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5
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Robison RD, DiBiase L, Anderson A, Wymer JP, Plowman EK. Maximum lingual pressure impacts both swallowing safety and efficiency in individuals with amyotrophic lateral sclerosis. Neurogastroenterol Motil 2023; 35:e14521. [PMID: 36573040 PMCID: PMC10033350 DOI: 10.1111/nmo.14521] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 12/05/2022] [Accepted: 12/10/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND Although reduced lingual strength is a confirmed early manifestation of amyotrophic lateral sclerosis (ALS), its functional impact on swallowing remains unclear. We therefore sought to examine relationships between maximum anterior isometric lingual pressure (MAIP) with swallowing safety, swallowing efficiency, and swallowing timing metrics in a large cohort of individuals with ALS. METHODS Ninety-seven participants with ALS completed a standardized videofluoroscopic swallowing examination (VF) and lingual pressure testing (Iowa Oral Performance Instrument). Duplicate and blinded ratings of the Penetration-Aspiration Scale (PAS) and Analysis of Swallowing Physiology: Events, Kinematics and Timing (ASPEKT) percent efficiency (%C2-C42 ) and timing (laryngeal vestibule closure (LVC) duration: amount of time (milliseconds, msec) between LVC onset and laryngeal vestibule opening; time-to-LVC: hyoid burst to onset of LVC (msec); and swallow reaction time: interval between bolus passing ramus of mandible and onset of LVC (msec)) were performed across bolus trials. Swallowing safety (safe PAS: 1, 2, 4; unsafe PAS: 3, 5, 6, 7, and 8) and efficiency (inefficient: ≥3% worst total residue) were derived. Statistical analyses including descriptives, binary logistic regressions, and Spearman's rho correlations were performed (α = 0.05). KEY RESULTS Mean MAIP was 36.3 kPa (SD: 18.7). Mean MAIP was higher in those with safe swallowing as compared to those who penetrated (mean difference: 12 kPa) or aspirated (mean difference: 18 kPa). Individuals with efficient swallowing demonstrated higher MAIP than those with inefficient swallowing (mean difference: 11 kPa). Binary logistic regression analyses revealed increasing MAIP was significantly associated with a 1.06 (95% CI: 1.03-1.09) and 1.04 (95% CI: 1.01-1.06) greater odds of safe and efficient swallowing, respectively. No relationships were observed between MAIP and swallow reaction time across all bolus trials. Longer time-to-LVC (5 ml thin liquid: rs = -0.35, p = 0.002; cup sip thin liquid: rs = -0.26, p = 0.02; moderately thick liquid: rs = -0.28, p = 0.01) and prolonged LVC duration (cup sip thin liquid, rs = -0.34, p = 0.003) were associated with lower MAIP. CONCLUSIONS AND INFERENCES Reduced lingual strength was confirmed in this group of 97 individuals with ALS that was associated with a diminished ability to effectively transport boluses and aide in laryngeal vestibule closure to prevent entry of material into the airway.
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Affiliation(s)
- Raele Donetha Robison
- Aerodigestive Research Core, University of Florida, Gainesville, Florida, USA
- Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
- Center for Health Disparities Research, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Lauren DiBiase
- Aerodigestive Research Core, University of Florida, Gainesville, Florida, USA
| | - Amber Anderson
- Aerodigestive Research Core, University of Florida, Gainesville, Florida, USA
| | - James P. Wymer
- Department of Neurology, University of Florida, Gainesville, Florida, USA
| | - Emily K. Plowman
- Aerodigestive Research Core, University of Florida, Gainesville, Florida, USA
- Department of Neurology, University of Florida, Gainesville, Florida, USA
- Speech, Language and Hearing Science Department, University of Florida, Gainesville, Florida, USA
- Department of Surgery, University of Florida, Gainesville, Florida, USA
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The Relationship Between Lingual Strength and Functional Swallowing Outcomes in Parkinson’s Disease. Dysphagia 2022:10.1007/s00455-022-10543-0. [DOI: 10.1007/s00455-022-10543-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 11/16/2022] [Indexed: 12/12/2022]
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7
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Gandhi P, Plowman EK, Steele CM. Comparison of Lingual Pressure Generation Capacity in Parkinson Disease, Amyotrophic Lateral Sclerosis, and Healthy Aging. AMERICAN JOURNAL OF SPEECH-LANGUAGE PATHOLOGY 2022; 31:1845-1853. [PMID: 35858265 PMCID: PMC9907496 DOI: 10.1044/2022_ajslp-21-00385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 03/01/2022] [Accepted: 04/25/2022] [Indexed: 06/15/2023]
Abstract
PURPOSE The tongue plays a key role in bolus propulsion during swallowing, with reduced lingual pressure generation representing a risk factor for impaired swallowing safety and efficiency. We compared lingual pressure generation capacity in people with Parkinson disease (PwPD), people with amyotrophic lateral sclerosis (PwALS), and healthy older adults. We hypothesized that both patient cohorts would demonstrate reduced maximum anterior isometric pressure (MAIP) and regular effort saliva swallow (RESS) pressures compared with healthy controls, with the greatest reductions expected in the ALS cohort. METHOD We enrolled 20 PwPD, 18 PwALS, and 20 healthy adults over 60 years of age. The Iowa Oral Performance Instrument was used to measure MAIP, RESS, and lingual functional reserve (LFR, i.e., MAIP - RESS). Descriptive statistics were calculated; between-groups differences were explored using univariate analyses of variance and post hoc Sidak tests with alpha set at .05. RESULTS Mean MAIPs for the PD, ALS, and heathy cohorts were 54.7, 33.5, and 47.4 kPa, respectively. Significantly lower MAIP was found in PwALS compared with PwPD and healthy controls. RESS values did not differ significantly across groups. LFR was significantly higher in PwPD versus PwALS and healthy controls. CONCLUSIONS Lingual pressure generation capacity and functional reserve were reduced in PwALS, but not in PwPD, beyond changes seen with healthy aging. Both patient cohorts displayed preserved lingual pressure during saliva swallows. Future studies exploring longitudinal changes in tongue pressure generation on isometric and saliva swallowing tasks will be needed to confirm whether tongue pressure measures serve as noninvasive clinical biomarkers of swallowing impairment.
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Affiliation(s)
- Pooja Gandhi
- Swallowing Rehabilitation Research Laboratory, KITE Research Institute, University Health Network, Toronto, Ontario, Canada
- Rehabilitation Sciences Institute, University of Toronto, Ontario, Canada
| | | | - Catriona M. Steele
- Swallowing Rehabilitation Research Laboratory, KITE Research Institute, University Health Network, Toronto, Ontario, Canada
- Rehabilitation Sciences Institute, University of Toronto, Ontario, Canada
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Effects of Tongue-Strengthening Exercise on Tongue Strength Reserve and Detraining Effects among Healthy Adults: A Randomized Controlled Trial. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19116878. [PMID: 35682461 PMCID: PMC9180874 DOI: 10.3390/ijerph19116878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 12/10/2022]
Abstract
Introduction: Tongue strength reserve is the difference between the maximum isometric pressure (MIP) and swallowing pressure of the tongue. People with decreased tongue strength reserve may have a higher risk of presbyphagia or dysphagia. Thus, this study explored the effects of tongue strengthening exercise (TSE) on tongue strength reserve and detraining effects in healthy adults. Materials and Methods: In total, 102 healthy volunteers without any reported history of speech or swallowing deficits were recruited and assigned to experimental (n = 50) and control groups (n = 52). Exercises in the experimental group consisted of compressing an air-filled bulb between the tongue and hard palate for 30 min a day, 5 days a week, for 8 weeks. Thereafter, the experimental group underwent a 4-week detraining period. Results: Following the TSE training, posterior tongue strength reserve (F = 4.92, p = 0.029) of the experimental group was significantly higher than that of the control group. No significant detraining effects were observed on the MIP and swallowing pressure from 4 weeks after the completion of TSE training. Conclusions: According to the study results, TSE may be an effective approach for improving swallowing function.
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9
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Casey V, Perry A, Conway R. Intraoral Swallow Pressure Profiles: General Features and Aids to Categorization. J Med Biol Eng 2022. [DOI: 10.1007/s40846-022-00682-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Abstract
Purpose
The primary goal of this study was to establish a normative data set representing intraoral time series swallow pressure profiles for healthy adults using a novel wearable intraoral pressure sensing system, OroPress, developed to help with dysphagia (swallow disorder) clinical screening.
Methods
Swallow intraoral pressure-time profiles for 35 healthy adults (17 male, 18 female) swallowing water ($$3 \times 5\, {\text{cm}^3}$$
3
×
5
cm
3
; $$3 \times 10\, {\text{cm}^3}$$
3
×
10
cm
3
) and custard ($$3 \times 5\, {\text{cm}^3}$$
3
×
5
cm
3
) boluses ($$N=9 \times 35 = 315$$
N
=
9
×
35
=
315
) were recorded using OroPress.
Results
General swallow profile traits are identified to characterise an effective, efficient swallow. A profile-specific swallow envelope function is devised which in combination with profile metrics, provides a simple means of categorizing swallows as effective or impaired.
Conclusion
The swallow profile data trace with superimposed and colour coded peaks, envelope function and related swallow metrics provides a simple human readable graphic to aid the real-time instrumented identification of subjects warranting more in-depth clinical assessment. It may also prove useful in the selection of training set profiles for machine learning and other analysis tools which could improve the discriminatory capabilities of intraoral pressure measurement in dysphagia diagnostics.
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Ng KB, Guiu Hernandez E, Erfmann KLC, Jones RD, Macrae P, Huckabee ML. Effect of Volitional Effort on Submental Surface Electromyographic Activity During Healthy Swallowing. Dysphagia 2021; 37:297-306. [PMID: 33687559 DOI: 10.1007/s00455-021-10278-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 02/24/2021] [Indexed: 11/30/2022]
Abstract
The effortful swallowing technique aims to compensate for or rehabilitate impaired swallowing by using maximal volitional effort to behaviorally modify aspects of swallowing physiology. Given that swallowing is a submaximal task, swallowing at submaximal levels has recently been suggested as a more task-specific therapeutic technique. The aim of this study was to investigate differences in muscle activity during minimum, regular, and maximum effort swallowing of different boluses and across different ages, with the goal of characterizing the task specificity of minimum effort and maximum effort swallowing. Forty-three healthy adults (22 female) representing four age groups (20-39, 40-59, 60-79, and 80 + years) participated in the study. They were verbally cued to swallow saliva and 5 mL water boluses using participant-determined minimum, regular, and maximum levels of effort, in randomized order. sEMG peak amplitude and duration of each swallow were measured. Linear mixed effects analyses demonstrated that compared to regular effort swallowing, maximum effort swallowing resulted in increased sEMG amplitude (p < .001) and prolonged duration (p < .001), while minimum effort swallowing resulted in decreased amplitude (p < .001) but no significant difference in duration (p = .06). These effects occurred regardless of age or bolus type. Differences in sEMG activity were smaller between regular and minimum effort swallowing than regular and maximum effort swallowing. Both increasing and decreasing volitional efforts during swallowing translate to significant modulation of muscle activity. However, regular swallowing is more similar to minimal effort swallowing. Results reinforce the concept of swallowing as a submaximal task, and provide insight into the development of sEMG biofeedback techniques for rehabilitation.
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Affiliation(s)
- Karen B Ng
- The University of Canterbury Rose Centre for Stroke Recovery and Research, Christchurch, New Zealand. .,School of Psychology, Speech and Hearing, University of Canterbury, Christchurch, New Zealand.
| | - Esther Guiu Hernandez
- The University of Canterbury Rose Centre for Stroke Recovery and Research, Christchurch, New Zealand.,School of Psychology, Speech and Hearing, University of Canterbury, Christchurch, New Zealand
| | - Kerstin L C Erfmann
- The University of Canterbury Rose Centre for Stroke Recovery and Research, Christchurch, New Zealand.,School of Psychology, Speech and Hearing, University of Canterbury, Christchurch, New Zealand
| | - Richard D Jones
- School of Psychology, Speech and Hearing, University of Canterbury, Christchurch, New Zealand.,Department of Electrical & Computer Engineering, University of Canterbury, Christchurch, New Zealand.,New Zealand Brain Research Institute, Christchurch, New Zealand.,Medical Physics & Bioengineering, Christchurch Hospital, Christchurch, New Zealand
| | - Phoebe Macrae
- The University of Canterbury Rose Centre for Stroke Recovery and Research, Christchurch, New Zealand.,School of Psychology, Speech and Hearing, University of Canterbury, Christchurch, New Zealand
| | - Maggie-Lee Huckabee
- The University of Canterbury Rose Centre for Stroke Recovery and Research, Christchurch, New Zealand.,School of Psychology, Speech and Hearing, University of Canterbury, Christchurch, New Zealand
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Curtis JA, Laus J, Schneider SL, Troche MS. Examining the Relationships Between Lingual Strength, Perihyoid Strength, and Swallowing Kinematics in Dysphagic Adults: A Retrospective Cross-Sectional Analysis. JOURNAL OF SPEECH, LANGUAGE, AND HEARING RESEARCH : JSLHR 2021; 64:405-416. [PMID: 33439740 DOI: 10.1044/2020_jslhr-20-00143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Purpose The aim of this study was to examine the relationships of clinical measures of lingual and perihyoid strength with displacement swallowing kinematics and swallowing safety in a heterogenous group of dysphagic adults. Method A retrospective analysis was completed of videofluoroscopic swallow studies of consecutive dysphagic outpatient adults presenting to a tertiary swallowing center from January 1, 2015, to December 31, 2017. Videofluoroscopic swallow study records were included if containing displacement swallowing kinematics of a 20-ml single liquid swallow and clinical measures of anterior (L-MIPA) or posterior (L-MIPP) lingual maximal isometric press, saliva mean swallowing pressures (S-MSP), and/or open mouth-maximal isometric press (OM-MIP). Regression analyses were used to examine the relationships between clinical measures of lingual (L-MIPA, L-MIPP, S-MSP) and perihyoid (OM-MIP) strength and displacement swallowing kinematics, and binomial logistic regressions were used to examine the relationships between clinical measures of lingual and perihyoid strength and swallowing safety (Penetration-Aspiration Scale [PAS]). Results Multivariate regressions revealed significant relationships of L-MIPA, L-MIPP, S-MSP, and OM-MIP with group-level changes to the displacement swallowing kinematics. Univariate analyses revealed significant relationships of L-MIPA and L-MIPP with pharyngeal constriction ratio, maximal extent of upper esophageal segment opening, and PAS. Conclusions Weak relationships were identified of clinical measures of lingual and perihyoid strength with displacement swallowing kinematics. These findings suggest that clinical measures of lingual and perihyoid strength do not fully explain impairments in swallowing kinematics across a heterogenous group of dysphagic patients. Weak-to-moderate relationships were identified between clinical measures of lingual strength and PAS, suggesting that they may have value in predicting functional measures of swallowing safety. Further research is needed to examine how findings may differ between specific patient populations.
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Affiliation(s)
- James A Curtis
- Laboratory for the Study of Upper Airway Dysfunction, Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY
| | - Joey Laus
- UCSF Voice and Swallowing Center, Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco
| | - Sarah L Schneider
- UCSF Voice and Swallowing Center, Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco
| | - Michelle S Troche
- Laboratory for the Study of Upper Airway Dysfunction, Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY
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Oommen ER, Cuellar ME, Scholten A, Rylander B, David M. Objective measures of lingual and jaw function in healthy adults and persons with Parkinson's disease: Implications for swallowing. Physiol Behav 2021; 232:113349. [PMID: 33545210 DOI: 10.1016/j.physbeh.2021.113349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 12/13/2022]
Abstract
The study examines the effects of age and Parkinson's disease on lingual and jaw function in neurotypical adults, as well as persons with Parkinson's Disease. Preliminary results provide reference measures in these populations and support the systematic collection of objective data regarding lingual strength, lingual range of motion, and jaw range of motion in clinical populations. The application of this clinically meaningful protocol also provides a means to track physiological changes over time in order to maximize the results of rehabilitative efforts to restore swallow function.
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Affiliation(s)
- Elizabeth R Oommen
- Calvin University, Speech Pathology and Audiology Department, 1810 E. Beltline Ave SE, Grand Rapids, MI 49546, United States
| | - Megan E Cuellar
- San José State University, Communicative Disorders & Sciences, One Washington Square, San Jose, CA 95192-0046, United States.
| | - Alyssa Scholten
- Helen DeVos Children's Hospital, 100 Michigan St NE, Grand Rapids, MI 49503, United States
| | - Bethany Rylander
- Colt Early Childhood Center, 4344 W. Michigan Ave, Lansing, MI 48917, United States
| | - Mallika David
- Metro Health, Univ of Michigan, 5900 Byron Center Ave, Wyoming, MI 49519, United States
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13
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Brates D, Molfenter S. The Influence of Age, Eating a Meal, and Systematic Fatigue on Swallowing and Mealtime Parameters. Dysphagia 2021; 36:1096-1109. [PMID: 33479862 DOI: 10.1007/s00455-020-10242-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 12/30/2020] [Indexed: 10/22/2022]
Abstract
Fatigue is widely accepted as a clinically relevant factor in the diagnosis, treatment, and management of dysphagia. Despite the relative importance that is placed on swallowing-related fatigue, the occurrence and effects of fatigue during swallowing is unclear. The goal of this study was to explore effects of eating a meal on measures of tongue strength, endurance, and other parameters of swallowing function under normal conditions compared to when the tongue is intentionally fatigued. Thirty healthy females, 15 "Young" (18-35 years old), and 15 "Old" (70 + years old) were seen for two data collection sessions one week apart. On both days, pre-meal measures were collected, then participants consumed a standardized meal based on a previously published protocol (half a bagel with peanut butter and 8 baby carrots) followed by post-meal measures. An additional pre-meal fatigue task was included on one of the test days (counterbalanced), involving maximal tongue presses until participants could not achieve 40% of baseline maximum pressure. Pre- and post-meal measures included anterior and posterior maximum tongue pressures, saliva swallow pressure, tongue endurance, surface electromyography (sEMG), the modified Borg scale, and the Test of Mastication and Swallowing of Solids (TOMASS). Linear mixed effects regressions compared pre- and post-meal outcome measures (1) on the non-fatigue day and (2) between fatigue and non-fatigue days while controlling for participant and age. The fatigue task caused significant reductions in maximum anterior and posterior tongue pressure. After a normal meal (i.e., without fatigue), we found decreased anterior pressures in the older group only. Older participants also had decreased saliva swallow pressures after the meal compared to pre-meal, while this measure increased post-mean in the young participants. When compared to the non-fatigue meal, eating a meal after tongue fatigue resulted in significantly lower post-meal posterior pressures, regardless of age group. The same pattern was observed with posterior functional reserve. Our results demonstrate that a systematic, participant-specific tongue fatigue task induced measurable changes in maximum tongue pressure. A meal by itself was observed to reduce anterior tongue strength and saliva swallow pressures only in older participants. Overall, it appears that older adults may be more vulnerable to fatigue-induced changes in tongue strength, though the relationship between these measures and changes to functional swallowing remains unknown.
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Affiliation(s)
- Danielle Brates
- Department of Communicative Sciences and Disorders, NYU Steinhardt, 665 Broadway, 9th Floor, New York, NY, 10012, USA.
| | - Sonja Molfenter
- Department of Communicative Sciences and Disorders, NYU Steinhardt, 665 Broadway, 9th Floor, New York, NY, 10012, USA
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Kletzien H, Kelm-Nelson CA, Wang S, Suzuki M, Connor NP. Myogenic marker expression as a function of age and exercise-based therapy in the tongue. Exp Gerontol 2020; 142:111104. [PMID: 33017670 PMCID: PMC7748063 DOI: 10.1016/j.exger.2020.111104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 08/29/2020] [Accepted: 09/24/2020] [Indexed: 12/30/2022]
Abstract
Degeneration of tongue muscles with aging may contribute to swallowing deficits observed in elderly people. However, the capacity for tongue muscle stem cells (SCs) to regenerate and repair the aged tongue and improve tongue strength following tongue exercise (a current clinical treatment) has never been examined. We found that the expression of regenerative, myogenic markers were impaired with age and may be related to increased expression of senescent marker p16INK4a. Tongue strength increased in young adult and old rats following exercise and was related to the expression of Pax7, MyoD, myogenin, and p16INK4a. Our study also suggests that strengthening of tongue muscles via clinical rehabilitation strategies also increased the expression of SC regenerative markers in the tongue throughout the exercise duration.
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Affiliation(s)
- Heidi Kletzien
- Department of Biomedical Engineering, University of Wisconsin-Madison, United States of America; Department of Surgery, University of Wisconsin School of Medicine and Public Health, United States of America; Department of Stem Cell and Regenerative Biology, Harvard University, United States of America.
| | - Cynthia A Kelm-Nelson
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, United States of America
| | - Sabrina Wang
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, United States of America
| | - Masatoshi Suzuki
- Department of Biomedical Engineering, University of Wisconsin-Madison, United States of America; Department of Comparative Biosciences, University of Wisconsin-Madison, United States of America
| | - Nadine P Connor
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, United States of America; Department of Communication Sciences and Disorders, University of Wisconsin-Madison, United States of America
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Chen YC, Chen PY, Wang YC, Wang TG, Han DS. Decreased swallowing function in the sarcopenic elderly without clinical dysphagia: a cross-sectional study. BMC Geriatr 2020; 20:419. [PMID: 33087067 PMCID: PMC7579958 DOI: 10.1186/s12877-020-01832-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 10/13/2020] [Indexed: 11/17/2022] Open
Abstract
Background Sarcopenia and dysphagia are prevalent health issues as the elderly population continues to grow. However, whether sarcopenia, defined by either reduced handgrip strength or gait speed, would lead to pathological effects on swallowing function is still a matter of debate. Studies focusing on subclinical changes in the swallowing function in the sarcopenic elderly are lacking. This study evaluates the swallowing function in the sarcopenic elderly without dysphagia. Methods: A cross-sectional study was conducted including subjects recruited from the community. Ninety-four individuals aged 65 and older without dysphagia were divided into two groups: sarcopenia and nonsarcopenia. The swallowing assessment included tongue pressure measurement, hyoid displacement (HD), hyoid velocity (HV) measurement with submental ultrasonography, 100-ml water-swallowing test, and the 10-item Eating Assessment Tool (EAT-10). Results The average tongue pressure was 47.0 ± 13.7 and 48.6 ± 11.5 kPa in the sarcopenia and nonsarcopenia groups, respectively (p = 0.55), whereas the average HD during swallowing was 15.3 ± 4.4 and 13.0 ± 4.2 mm in the sarcopenia and nonsarcopenia groups, respectively (p < 0.05). The median of HV during swallowing was 19.5 (6.41–45.86) and 15.9 (3.7–39.7) mm/s in the sarcopenia and nonsarcopenia group (p < 0.05). The median of time needed for consuming 100 ml water was 12.43 (3.56–49.34) and 5.66 (2.07–19.13) seconds in the sarcopenia and nonsarcopenia groups, respectively (p < 0.05). The median of the EAT-10 score was 0 (0–2) and 0 (0–1) in the sarcopenia and nonsarcopenia groups, respectively (p < 0.05). Conclusions In elderly individuals, swallowing function was significantly impaired with sarcopenia before clinical symptoms become clear. However, tongue muscles exhibited resistance to sarcopenia. We observed compensative strategies in patients with sarcopenia, such as reduced swallowing speed and increased hyoid bone movement.
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Affiliation(s)
- Yen-Chih Chen
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, No.1, Changde Street, Zhongzheng District, Taipei City, 10048, Taiwan, Republic of China
| | - Pei-Yun Chen
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, No.1, Changde Street, Zhongzheng District, Taipei City, 10048, Taiwan, Republic of China
| | - Yu-Chen Wang
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, No.1, Changde Street, Zhongzheng District, Taipei City, 10048, Taiwan, Republic of China
| | - Tyng-Guey Wang
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, No.1, Changde Street, Zhongzheng District, Taipei City, 10048, Taiwan, Republic of China.
| | - Der-Sheng Han
- Physical Medicine & Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, No.87, Neijiang Street, Wanhua District, Taipei City, Taiwan
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Suzuki M, Koyama S, Kimura Y, Ishiyama D, Ohji S, Otobe Y, Nishio N, Kunieda Y, Ichikawa T, Ito D, Ogawa H, Yamada M. Relationship between tongue muscle quality and swallowing speed in community-dwelling older women. Aging Clin Exp Res 2020; 32:2073-2079. [PMID: 31673992 DOI: 10.1007/s40520-019-01388-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 10/14/2019] [Indexed: 12/22/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the relationship between tongue muscle quality index, which was represented as tongue muscle pressure divided by tongue muscle mass, and swallowing speed in community-dwelling older women. METHODS The inclusion criteria for this cross-sectional study were that participants be community-dwelling older women aged 65 years and above without dysphagia. The exclusion criteria were stroke and Parkinson's disease that directly cause dysphagia. We measured tongue muscle thickness and maximum tongue pressure and the tongue muscle quality index, which was defined as the maximum tongue pressure divided by tongue muscle thickness. We investigated swallowing speed via a 100 ml water swallowing test. To assess the relationship between tongue muscle characteristics and swallowing speed, we performed stepwise multiple regression analysis. RESULTS Ninety-three participants were enrolled in this study (mean age: 84.2 ± 4.7 years). A stepwise multiple regression analysis showed that age (β = - 0.292, p < 0.01) and tongue muscle quality index (β = 0.267, p < 0.01) were related to swallowing speed. CONCLUSION We found that tongue muscle quality index was related to swallowing speed in community-dwelling older women. According to our findings, it is possible that the tongue muscle quality index is a useful parameter for assessing swallowing speed in older women without dysphagia.
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Affiliation(s)
- Mizue Suzuki
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan.
| | - Shingo Koyama
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Yosuke Kimura
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Daisuke Ishiyama
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Shunsuke Ohji
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Yuhei Otobe
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Naohito Nishio
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Yota Kunieda
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Takeo Ichikawa
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Daisuke Ito
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Hideyuki Ogawa
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Minoru Yamada
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
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Oh JC. Systematic Effortful Swallowing Exercise Without External Resistance Does Not Increase Swallowing-Related Muscle Strength in the Elderly. Dysphagia 2020; 36:465-473. [PMID: 32720053 DOI: 10.1007/s00455-020-10163-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 07/20/2020] [Indexed: 10/23/2022]
Abstract
Effortful swallow (ES) is a maneuver intended to increase pressure on a bolus by swallowing and pushing with sufficient force to facilitate clearance. Although ES is mainly known for its immediate effects, the long-term effects of applying ES as an exercise program remain unclear. This study investigated the effects of a 7-week systematic ES exercise regime on swallowing-related muscle strength in individuals aged 65 years and over. In total, 30 healthy older adults participated in this study (16 women and 14 men, aged 67-90 years). The subjects participated in the exercise program for 20 min a day, twice a week, for 7 weeks. To gradually increase exercise intensity, the number of exercises per session was increased from the initial 60 repetitions (weeks 1-2) to 120 repetitions (weeks 5-7). To measure the effect of the strengthening exercise program, the activation level of suprahyoid muscles was measured using surface electromyography, and a tongue pressure measurement system was used to measure variables related to tongue strength (isometric tongue pressure, swallowing tongue pressure, and tongue endurance). Although the effect of ES exercise on muscle strength through gradual adjustment of exercise frequency was not confirmed, ES remains valuable as an exercise for strengthening the muscles involved in swallowing. Future studies are warranted to determine the effects of ES exercise after adjusting for other variables of exercise intensity.
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Affiliation(s)
- Jong-Chi Oh
- Department of Occupational Therapy, Cheongju University, 298 Daesung-ro, Cheongwon-gu, Cheongju, Chungcheongbuk-do, Cheongju city, 28503, Republic of Korea.
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Rogus-Pulia NM, Plowman EK. Shifting Tides Toward a Proactive Patient-Centered Approach in Dysphagia Management of Neurodegenerative Disease. AMERICAN JOURNAL OF SPEECH-LANGUAGE PATHOLOGY 2020; 29:1094-1109. [PMID: 32650651 PMCID: PMC7844336 DOI: 10.1044/2020_ajslp-19-00136] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Purpose Persons with neurodegenerative disease frequently develop comorbid dysphagia as part of their disease process. Current "reactive" approaches to dysphagia management address dysphagia once it manifests clinically and consist of compensatory approaches. The purpose of this article is to propose a paradigm shift in dysphagia management of patients with neurodegenerative disease from a "reactive to proactive" approach by highlighting amyotrophic lateral sclerosis (ALS) and dementia as case examples. Method The authors present several areas of special consideration for speech-language pathologists (SLPs) treating dysphagia in patients with neurodegenerative disease. The drawbacks of historical "reactive" approaches to dysphagia management are described. Concepts of functional reserve for swallowing and homeostenosis are discussed. A "proactive" patient-centered paradigm of care for these patients is proposed with evidence to support its importance. A rationale for use of this approach in patients with ALS and dementia is provided with strategies for implementation. Results When treating dysphagia in patients with neurodegenerative disease, SLPs must balance a variety of factors in their decision making, including disease severity and expected progression, cultural considerations, goals of care, patient empowerment, and caregiver support. Reactive approaches to dysphagia management in these populations are problematic in that they disempower patients by focusing on use of compensatory techniques (e.g., diet modification, postural changes, feeding tube placement). Proactive approaches that employ rehabilitative interventions to increase functional reserve, such as resistance training, may result in improvement or maintenance of swallowing function longer into disease progression. An interdisciplinary team with early SLP involvement is necessary. Conclusions SLPs play a critical role in the management of dysphagia in patients with neurodegenerative disease and should be integrated early in the care of these patients. By focusing on a proactive patient-centered approach, patients with neurodegenerative conditions, such as ALS and dementia, will experience improved quality of life and health outcomes for a longer time.
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Affiliation(s)
- Nicole M. Rogus-Pulia
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health
- Department of Surgery, University of Wisconsin-Madison School of Medicine and Public Health
- Geriatric Research Education and Clinical Center, William S. Middleton Memorial Veterans Hospital, Madison, WI
| | - Emily K. Plowman
- Department of Speech, Language and Hearing Sciences, University of Florida, Gainesville
- Aerodigestive Research Core, University of Florida, Gainesville
- Department of Neurology, College of Medicine, University of Florida, Gainesville
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Surface Electromyographic Biofeedback and the Effortful Swallow Exercise for Stroke-Related Dysphagia and in Healthy Ageing. Dysphagia 2020; 36:281-292. [PMID: 32445060 PMCID: PMC8004490 DOI: 10.1007/s00455-020-10129-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 05/05/2020] [Indexed: 11/29/2022]
Abstract
Dysphagia is common after stroke, leading to adverse outcome. The Effortful Swallow (ES) is recommended to improve swallowing but it is not known if dysphagic patients can increase muscle activity during the exercise or if age affects performance. Providing surface electromyographic (sEMG) biofeedback during dysphagia therapy may enhance exercise completion, but this has not been investigated and the technique’s acceptability to patients is not known. Aims: To determine if age or post-stroke dysphagia affect the ability to increase submental muscle activity during the ES, if sEMG biofeedback improves ES performance and if sEMG is an acceptable addition to therapy. In a Phase I study submental sEMG amplitudes were measured from 15 people with dysphagia < 3 months post-stroke and 85 healthy participants aged 18–89 years during swallowing (NS) and when they performed the ES with and without sEMG biofeedback. Participant feedback was collected via questionnaire. Measurements were compared with repeated measures ANOVA and age effects were examined with linear regression. Both groups produced significantly greater muscle activity for the ES than NS (p < 0.001) and significantly increased activity with biofeedback (p < 0.001) with no effect of age. Participant feedback about sEMG was very positive; over 98% would be happy to use it regularly. The ES is a physiologically beneficial dysphagia exercise, increasing muscle activity during swallowing. sEMG biofeedback further enhances performance and is considered an acceptable technique by patients. These findings support the potential application of sEMG biofeedback and the ES in dysphagia therapy in stroke, justifying further investigation of patient outcome.
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20
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Ultrasonography to detect age-related changes in swallowing muscles. Eur Geriatr Med 2019; 10:753-760. [DOI: 10.1007/s41999-019-00223-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 07/19/2019] [Indexed: 12/28/2022]
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21
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Oral processing in elderly: understanding eating capability to drive future food texture modifications. Proc Nutr Soc 2018; 78:329-339. [DOI: 10.1017/s0029665118002768] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Ageing population suffer from increased risk of malnutrition which is a major determinant of accelerated loss of autonomy, adverse health outcomes and substantial health-care costs. Malnutrition is largely attributed to reduced nutrient intake which may be associated with several endogenous factors, such as decline of muscle mass, oral functions and coordination that can make the eating process difficult. From an exogenous viewpoint, nutritionally dense foods with limited innovations in food texture have been traditionally offered to elderly population that negatively affected pleasure of eating and ultimately, nutrient intake. Recent research has recognised that older adults within the same age group are not homogenous in terms of their preferences, nutritional needs, capabilities and impediments in skill-sets. Hence, a new term eating capability (EC) has been coined to describe various quantifiable endogenous factors in the well-coordinated eating process that may permit characterisation of the capabilities of elderly individuals in food handling and oral processing. This review covers current knowledge on EC focusing on parameters, such as hand and oro-facial muscle forces. Although limited in literature, EC score measured using a comprehensive toolkit has shown promise to predict eating difficulty perception and oral processing behaviour. Further systematic studies are required to explore relationships between individual/multiple constituents of EC and oral comfort. Such knowledge base is needed to underpin the creation of next generation personalised texture-modified foods for elderly population using sophisticated technologies, such as 3D printing to enhance eating pleasure, increase nutrient intake that will ultimately contribute to tackling malnutrition.
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Effects of Tongue-Hold Swallows on Suprahyoid Muscle Activation According to the Relative Tongue Protrusion Length in the Elderly Individuals. Dysphagia 2018; 34:382-390. [DOI: 10.1007/s00455-018-9948-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 09/18/2018] [Indexed: 01/18/2023]
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Suzuki M, Koyama S, Kimura Y, Ishiyama D, Otobe Y, Nishio N, Ichikawa T, Kunieda Y, Ohji S, Ito D, Yamada M. Relationship between characteristics of skeletal muscle and oral function in community-dwelling older women. Arch Gerontol Geriatr 2018; 79:171-175. [PMID: 30265912 DOI: 10.1016/j.archger.2018.09.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 09/08/2018] [Accepted: 09/09/2018] [Indexed: 11/19/2022]
Abstract
PURPOSE To examine the relationship between oral function and sarcopenia staging, including dynapenia and presarcopenia, in community-dwelling older adults. METHODS A cross-sectional study was performed in community-dwelling older women aged 65 years and above. We measured oral muscle strength using maximum tongue pressure, oral muscle performance using oral diadochokinesis, and subjective swallowing difficulties using the Eating Assessment Tool. We measured skeletal muscle mass and function and other variables. All participants were divided into 4 groups (normal, presarcopenia, dynapenia, and sarcopenia) using an algorithm that operationally defines sarcopenia staging by skeletal muscle characteristics. A general linear model was used to analyze differences in oral function among the 4 groups. RESULTS A total of 245 participants were enrolled (median age [IQR], 81.0 [75.0-85.0]). The proportion of normal participants and those with presarcopenia, dynapenia, and sarcopenia was 48.6% (n = 119), 9.4% (n = 23), 30.2% (n = 74), and 11.8% (n = 29), respectively. The sarcopenia and dynapenia groups had significantly lower maximum tongue pressure and oral diadochokinesis than the normal group. In the multivariate analysis, after adjusting for age, maximum tongue pressure and oral diadochokinesis were found to be significantly lower in the sarcopenia and dynapenia groups than in the normal group. CONCLUSIONS In this study, participants with sarcopenia and dynapenia showed low oral function, and similar trends were indicated for oral function and skeletal muscle according to progression of sarcopenia staging. Future research should clarify the characteristics of swallowing-related muscles, including muscle mass, strength, and performance at each sarcopenia stage.
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Affiliation(s)
- Mizue Suzuki
- Visiting Nursing Station AT Shukugawara, 3-2-1 Shukugawara, Tama-ku, Kawasaki, Kanagawa, 214-0021, Japan; Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan.
| | - Shingo Koyama
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Yosuke Kimura
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Daisuke Ishiyama
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Yuhei Otobe
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Naohito Nishio
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Takeo Ichikawa
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Yota Kunieda
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Shunsuke Ohji
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Daisuke Ito
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
| | - Minoru Yamada
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, 3-29-1 Otsuka, Bunkyo-ku, Tokyo, 112-0012, Japan
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Sokoloff AJ, Douglas M, Rahnert JA, Burkholder T, Easley KA, Luo Q. Absence of morphological and molecular correlates of sarcopenia in the macaque tongue muscle styloglossus. Exp Gerontol 2016; 84:40-48. [PMID: 27566374 DOI: 10.1016/j.exger.2016.08.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 08/18/2016] [Accepted: 08/22/2016] [Indexed: 01/06/2023]
Abstract
INTRODUCTION Equivocal decline of tongue muscle performance with age is compatible with resistance of the tongue to sarcopenia, the loss of muscle volume and function that typically occurs with aging. To test this possibility we characterized anatomical and molecular indices of sarcopenia in the macaque tongue muscle styloglossus (SG). METHODS We quantified myosin heavy chain (MHC), muscle fiber MHC phenotype and size and total and phosphorylated growth- and atrophy-related proteins by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), immunoblot and immunohistochemistry (IHC) in the SG in twenty-four macaque monkeys (Macaca rhesus, age range 9months to 31years) categorized into Young (<8years of age), Middle-aged (15-21years of age) and Old (>22years of age) groups. RESULTS In Young, Middle and Old age groups, by SDS-PAGE MHCI comprised ~1/3 and MHCII ~2/3 of total MHC. MHCI relative frequency was lower and MHCII higher in Middle versus Young (p=0.0099) and Middle versus Old (p=0.052). Relative frequencies of MHC fiber phenotype were not different by age but were different by phenotype (rates 233, 641 and 111 per 1000 fibers for MHCI, MHCII and MHCI-II respectively, p=0.03). Few or no fibers were positive for developmental MHC. Mean cross-sectional area (CSA) was not different among the three age groups for MHCII and MHCI-II; however MHCI fibers tended to be larger in Middle versus Old and Young (mean=2257μm2,1917μm2 (p=0.05) and 1704μm2 (p=0.06), respectively). For each age group, mean CSA increased across MHC phenotype (lowest mean CSA for MHCI and highest mean CSA for MHCII). Spearman analysis demonstrated age-related increases in total p70 ribosomal protein S6 kinase (P70), phosphorylated P70421/424, phosphorylated P38 mitogen-activated protein kinase and muscle atrophy F-Box, a trend to age-related decrease in total extracellular signal-regulated kinase (ERK), and no age-related change in total protein kinase B (Akt/PKB), phosphorylated Akt, phosphorylated ERK, phosphorylated c-Jun N-terminal kinase (JNK46) and phosphorylated P70389. CONCLUSION Common anatomical and molecular indices of sarcopenia are absent in our sample of macaque SG. Relative frequencies of MHCII protein and phenotype are preserved with age. Although MAFbx expression increases with age, this is not associated with fiber atrophy, perhaps reflecting compensatory growth signaling by p70. The resistant nature of the styloglossus muscle to sarcopenia may be related to routine activation of tongue muscles in respiration and swallowing and the preservation of hypoglossal motoneuron number with age.
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Affiliation(s)
- Alan J Sokoloff
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, United States.
| | - Megan Douglas
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, United States
| | - Jill A Rahnert
- School of Applied Physiology, Georgia Institute of Technology, Atlanta, GA, United States
| | - Thomas Burkholder
- School of Applied Physiology, Georgia Institute of Technology, Atlanta, GA, United States
| | - Kirk A Easley
- Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA, United States
| | - Qingwei Luo
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, United States
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Oh JC. A Pilot Study of the Head Extension Swallowing Exercise: New Method for Strengthening Swallowing-Related Muscle Activity. Dysphagia 2016; 31:680-6. [PMID: 27461480 DOI: 10.1007/s00455-016-9732-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 07/18/2016] [Indexed: 11/29/2022]
Abstract
This pilot study examined the effect of a new head extension swallowing exercise (HESE) on submental muscle activity and tongue strength in healthy volunteers. Fifteen young adults (10 females and 5 males) were instructed to extend their head backwards as much as possible, and while watching the ceiling, swallowed their saliva every 10 s for a duration of 20 min. Twenty-four treatments were performed over 8 weeks. The outcome variables evaluated at baseline, 4 and 8 weeks of training, and 12-week follow-up included mean and peak submental muscle activation amplitudes during normal and effortful swallowing measured via surface electromyography, and anterior and posterior isometric tongue pressures were measured with the Iowa Oral Performance Instrument. Results indicated that the muscle activation amplitudes during effortful swallowing increased significantly at 4 and 8 weeks compared to baseline (p < 0.025). However, the increases in amplitudes during normal swallowing were minor (nonsignificant) after 8 weeks compared to baseline. The isometric pressures of the tongue tip and the posterior part of the oral tongue were significantly higher at 8 weeks compared to baseline (p < 0.025). Thus, the 8-week HESE protocol significantly improved suprahyoid muscle activity during effortful swallowing as well as the isometric tongue pressures. The HESE appears effective in exercising and strengthening the suprahyoid muscles and tongue muscles in healthy participants. Although encouraging, these results need to be replicated in clinical trials for testing the therapeutic effects of the HESE in older adults and patients with dysphagia who present with decreased hyolaryngeal elevation.
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Affiliation(s)
- Jong-Chi Oh
- Department of Occupational Therapy, Cheongju University, 298 Daesung-ro, Cheongwon-gu, Cheongju, Chungcheongbuk-do, 28503, Republic of Korea.
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Steele CM, Bayley MT, Peladeau-Pigeon M, Nagy A, Namasivayam AM, Stokely SL, Wolkin T. A Randomized Trial Comparing Two Tongue-Pressure Resistance Training Protocols for Post-Stroke Dysphagia. Dysphagia 2016; 31:452-61. [PMID: 26936446 DOI: 10.1007/s00455-016-9699-5] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 02/22/2016] [Indexed: 11/25/2022]
Abstract
The objective of this study was to compare the outcomes of two tongue resistance training protocols. One protocol ("tongue-pressure profile training") emphasized the pressure-timing patterns that are typically seen in healthy swallows by focusing on gradual pressure release and saliva swallowing tasks. The second protocol ("tongue-pressure strength and accuracy training") emphasized strength and accuracy in tongue-palate pressure generation and did not include swallowing tasks. A prospective, randomized, parallel allocation trial was conducted. Of 26 participants who were screened for eligibility, 14 received up to 24 sessions of treatment. Outcome measures of posterior tongue strength, oral bolus control, penetration-aspiration and vallecular residue were made based on videofluoroscopy analysis by blinded raters. Complete data were available for 11 participants. Significant improvements were seen in tongue strength and post-swallow vallecular residue with thin liquids, regardless of treatment condition. Stage transition duration (a measure of the duration of the bolus presence in the pharynx prior to swallow initiation, which had been chosen to capture impairments in oral bolus control) showed no significant differences. Similarly, significant improvements were not seen in median scores on the penetration-aspiration scale. This trial suggests that tongue strength can be improved with resistance training for individuals with tongue weakness following stroke. We conclude that improved penetration-aspiration does not necessarily accompany improvements in tongue strength; however, tongue-pressure resistance training does appear to be effective for reducing thin liquid vallecular residue.
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Affiliation(s)
- Catriona M Steele
- Swallowing Rehabilitation Research Laboratory, Toronto Rehabilitation Institute - University Health Network, 550 University Avenue, 12th Floor, Toronto, ON, M5G 2A2, Canada.
- University of Toronto, Toronto, ON, M5G 1X5, Canada.
| | - Mark T Bayley
- Swallowing Rehabilitation Research Laboratory, Toronto Rehabilitation Institute - University Health Network, 550 University Avenue, 12th Floor, Toronto, ON, M5G 2A2, Canada
- University of Toronto, Toronto, ON, M5G 1X5, Canada
| | - Melanie Peladeau-Pigeon
- Swallowing Rehabilitation Research Laboratory, Toronto Rehabilitation Institute - University Health Network, 550 University Avenue, 12th Floor, Toronto, ON, M5G 2A2, Canada
| | - Ahmed Nagy
- Swallowing Rehabilitation Research Laboratory, Toronto Rehabilitation Institute - University Health Network, 550 University Avenue, 12th Floor, Toronto, ON, M5G 2A2, Canada
- University of Fayoum, Fayoum, Egypt
| | - Ashwini M Namasivayam
- Swallowing Rehabilitation Research Laboratory, Toronto Rehabilitation Institute - University Health Network, 550 University Avenue, 12th Floor, Toronto, ON, M5G 2A2, Canada
- University of Toronto, Toronto, ON, M5G 1X5, Canada
| | - Shauna L Stokely
- Swallowing Rehabilitation Research Laboratory, Toronto Rehabilitation Institute - University Health Network, 550 University Avenue, 12th Floor, Toronto, ON, M5G 2A2, Canada
| | - Talia Wolkin
- Swallowing Rehabilitation Research Laboratory, Toronto Rehabilitation Institute - University Health Network, 550 University Avenue, 12th Floor, Toronto, ON, M5G 2A2, Canada
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Age-Related Differences in Pressures Generated During Isometric Presses and Swallows by Healthy Adults. Dysphagia 2015; 31:90-6. [DOI: 10.1007/s00455-015-9662-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 10/14/2015] [Indexed: 01/16/2023]
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Schaser AJ, Ciucci MR, Connor NP. Cross-activation and detraining effects of tongue exercise in aged rats. Behav Brain Res 2015; 297:285-96. [PMID: 26477376 DOI: 10.1016/j.bbr.2015.10.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Revised: 10/09/2015] [Accepted: 10/11/2015] [Indexed: 02/05/2023]
Abstract
Voice and swallowing deficits can occur with aging. Tongue exercise paired with a swallow may be used to treat swallowing disorders, but may also benefit vocal function due to cross-system activation effects. It is unknown how exercise-based neuroplasticity contributes to behavior and maintenance following treatment. Eighty rats were used to examine behavioral parameters and changes in neurotrophins after tongue exercise paired with a swallow. Tongue forces and ultrasonic vocalizations were recorded before and after training/detraining in young and old rats. Tissue was analyzed for neurotrophin content. Results showed tongue exercise paired with a swallow was associated with increased tongue forces at all ages. Gains diminished after detraining in old rats. Age-related changes in vocalizations, neurotrophin 4 (NT4), and brain derived neurotrophic factor (BDNF) were found. Minimal cross-system activation effects were observed. Neuroplastic benefits were demonstrated with exercise in old rats through behavioral improvements and up-regulation of BDNF in the hypoglossal nucleus. Tongue exercise paired with a swallow should be developed, studied, and optimized in human clinical research to treat swallowing and voice disorders in elderly people.
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Affiliation(s)
- Allison J Schaser
- Department of Communication Sciences and Disorders, Department of Surgery Division of Otolaryngology-Head and Neck Surgery, University of Wisconsin-Madison, 53706, United States.
| | - Michelle R Ciucci
- Department of Communication Sciences and Disorders, Department of Surgery Division of Otolaryngology-Head and Neck Surgery, University of Wisconsin-Madison, 53706, United States
| | - Nadine P Connor
- Department of Communication Sciences and Disorders, Department of Surgery Division of Otolaryngology-Head and Neck Surgery, University of Wisconsin-Madison, 53706, United States
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Becker BJ, Russell JA, Connor NP. Effects of aging on evoked retrusive tongue actions. Arch Oral Biol 2015; 60:966-71. [PMID: 25847069 DOI: 10.1016/j.archoralbio.2015.02.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 02/24/2015] [Accepted: 02/25/2015] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Tongue strength, timing, and coordination deficits may underlie age-related swallowing function. Retrusive tongue actions are likely important in retrograde bolus transport. However, age-related changes in retrusive tongue muscle contractile properties have not been identified in animal studies. Because previous studies employed whole hypoglossal nerve stimulation that activated both protrusive and retrusive tongue muscles, co-contraction may have masked retrusive muscle force decrements. The hypotheses of this study were: (1) retrusive tongue muscle contraction forces would be diminished and temporal characteristics prolonged in old rats when lateral nerves were selectively activated, and (2) greater muscle contractile forces with selective lateral branch stimulation would be found relative to whole hypoglossal nerve stimulation. DESIGN Nineteen Fischer 344/Brown Norway rats (9 old, 10 young adult) underwent tongue muscle contractile property recording elicited by: (1) bilateral whole hypoglossal nerve stimulation, and (2) selective lateral branch stimulation. Twitch contraction time (CT), half-decay time, maximal twitch and tetanic forces, and a fatigue index were measured. RESULTS For whole nerve stimulation, CT was significantly longer in the old group. No significant age group differences were found with selective lateral nerve stimulation. Significantly reduced twitch forces (old group only), increased tetanic forces and significantly less fatigue were found with selective lateral nerve stimulation than with whole hypoglossal stimulation. CONCLUSIONS Retrusive tongue forces are not impaired in old rats. Deficits observed in swallowing with aging may be due to other factors such as inadequate bolus propulsive forces, mediated by protrusive tongue muscles, or timing/coordination of muscle actions.
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Affiliation(s)
- Benjamin J Becker
- Department of Surgery, Division of Otolaryngology-Head and Neck Surgery, University of Wisconsin, Madison, WI, United States
| | - John A Russell
- Department of Surgery, Division of Otolaryngology-Head and Neck Surgery, University of Wisconsin, Madison, WI, United States
| | - Nadine P Connor
- Department of Surgery, Division of Otolaryngology-Head and Neck Surgery, University of Wisconsin, Madison, WI, United States; Department of Communication Sciences and Disorders, University of Wisconsin, Madison, WI, United States.
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Variations in tongue-palate swallowing pressures when swallowing xanthan gum-thickened liquids. Dysphagia 2014; 29:678-84. [PMID: 25087111 PMCID: PMC4247849 DOI: 10.1007/s00455-014-9561-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 07/11/2014] [Indexed: 11/06/2022]
Abstract
Thickened liquids are frequently recommended to reduce the risk of aspiration in patients with oropharyngeal dysphagia. Although it has previously been reported that tongue-palate pressures increase when swallowing spoon-thick and semi-solid consistencies compared to thin liquids, relatively little is known about how swallowing behaviors differ when swallowing liquids of nectar- or honey-thick consistency. Furthermore, previous studies have primarily used starch-based thickeners, and little is known about swallowing behaviors with xanthan gum-thickened liquids, which have recently been introduced for dysphagia management. In this study, we measured variations in tongue-palate pressures during the swallowing of liquids thickened to apparent viscosities of 190, 250, and 380 mPa s at 50/s using increasing concentrations of xanthan gum (0.5, 0.63 and 0.87 w/w%). The viscosity differences between these nectar- and honey-thick stimuli were confirmed to exceed sensory perceptual discrimination thresholds. Data were collected from 78 healthy adults in two sex-balanced age-groups (young; mature) and compared to reference values obtained during water swallowing. The results confirm that increased amplitudes of tongue-palate pressure were used when swallowing the thickened liquid stimuli, compared to swallows of water, and for the honey-thick liquid compared to the two nectar-thick liquids. Age-related reductions were seen in tongue strength but not in swallowing pressures, which fell below 40 % of maximum isometric pressure values. Thus, the use of xanthan gum-thickened liquids is unlikely to tax the swallowing system in terms of tongue pressure generation requirements, even in seniors with reduced maximum isometric tongue pressure measures.
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Steele CM, Hill L, Stokely S, Peladeau-Pigeon M. Age and strength influences on lingual tactile acuity. J Texture Stud 2014; 45:317-323. [PMID: 25663715 DOI: 10.1111/jtxs.12076] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sensory function during the oral processing of liquids is thought to play a key role in informing the tailoring of swallowing motor behaviours to the flow characteristics of the bolus. In addition to taste receptors, the mouth and tongue house trigeminal nerve receptors that support the sensory detection of bolus size, shape (stereognosis), mass, temperature and movement. Recent studies suggest that healthy adults lose tongue strength with advancing age. However, little is known about changes in the sensory function of the tongue attributable to age, or associated with reductions in strength. In this study, we explored lingual tactile acuity in healthy young and older adults, and measured the relationship between tactile acuity and measures of tongue strength. The results showed an age-related reduction in lingual tactile acuity that was not explained by variations in tongue strength. PRACTICAL APPLICATIONS Sensory motor interactions are a topic of interest in understanding the processing activities that take place in the mouth during eating and swallowing. In this paper, we explore a test of sensory acuity in the mouth, in which the tongue is used to "read" embossed letters on Teflon strips. Our questions were to determine whether sensory acuity for this task declines with age, or with age-related reductions in tongue strength. We determined that older people perform this task with less accuracy, suggesting some changes in oral sensory function with age. However, these changes were not related to tongue strength. The findings suggest that strength does not play a major role in the kind of sensory discrimination task tested in this study.
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Affiliation(s)
- Catriona M Steele
- Toronto Rehabilitation Institute - University Health Network, Toronto, Canada ; University of Toronto, Toronto, Canada ; Bloorview Research Institute - Holland Bloorview Kids Rehab Hospital, Toronto, Canada
| | - Lisa Hill
- University of Kentucky, Lexington, KY
| | - Shauna Stokely
- Toronto Rehabilitation Institute - University Health Network, Toronto, Canada
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Alsanei WA, Chen J. Studies of the Oral Capabilities in Relation to Bolus Manipulations and the Ease of Initiating Bolus Flow. J Texture Stud 2013. [DOI: 10.1111/jtxs.12041] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Jianshe Chen
- School of Food Science and Nutrition; University of Leeds; Leeds LS2 9JT U.K
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