Heather Clark, PhD

  • 863 Citations
  • 15 Scopus h-Index
19982019
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Research Output 1998 2019

  • 863 Citations
  • 15 Scopus h-Index
  • 43 Article
  • 4 Review article
  • 2 Comment/debate
  • 1 Short survey
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Article
2019

An Evaluation of the Progressive Supranuclear Palsy Speech/Language Variant

Whitwell, J. L., Stevens, C. A., Duffy, J. R., Clark, H., Machulda, M. M., Strand, E. A., Martin, P. R., Utianski, R., Botha, H., Spychalla, A. J., Senjem, M. L., Schwarz, C., Jack, C. R. J., Ali, F., Hassan, A. & Josephs, K. A., Jan 1 2019, In : Movement Disorders Clinical Practice.

Research output: Contribution to journalArticle

Progressive Supranuclear Palsy
Language
Parkinsonian Disorders
Mesencephalon
Language Disorders

Clinical and neuroimaging characteristics of clinically unclassifiable primary progressive aphasia

Utianski, R., Botha, H., Martin, P. R., Schwarz, C., Duffy, J. R., Clark, H., Machulda, M. M., Butts, A., Lowe, V., Jack, C. R. J., Senjem, M. L., Spychalla, A. J., Whitwell, J. L. & Josephs, K. A., Oct 1 2019, In : Brain and Language. 197, 104676.

Research output: Contribution to journalArticle

Primary Progressive Aphasia
speech disorder
Neuroimaging
diagnostic
visualization

Progressive agrammatic aphasia without apraxia of speech as a distinct syndrome

Tetzloff, K. A., Duffy, J. R., Clark, H., Utianski, R., Strand, E. A., Machulda, M. M., Botha, H., Martin, P. R., Schwarz, C., Senjem, M. L., Reid, R. I., Gunter, J. L., Spychalla, A. J., Knopman, D. S., Petersen, R. C., Jack, C. R. J., Lowe, V., Josephs, K. A. & Whitwell, J. L., Aug 1 2019, In : Brain : a journal of neurology. 142, 8, p. 2466-2482 17 p.

Research output: Contribution to journalArticle

Apraxias
Aphasia
Broca Aphasia
Parkinsonian Disorders
Neuroimaging
2 Citations (Scopus)
Primary Progressive Aphasia
Agnosia
Language
Apraxias
Deafness
1 Citation (Scopus)

The influence of β-amyloid on [ 18 F]AV-1451 in semantic variant of primary progressive aphasia

Whitwell, J. L., Martin, P. R., Duffy, J. R., Clark, H., Machulda, M. M., Schwarz, C., Weigand, S. D., Sintini, I., Senjem, M. L., Taner, N., Botha, H., Utianski, R., Graff-Radford, J., Jones, D. T., Boeve, B. F., Knopman, D. S., Petersen, R. C., Jack, C. R. J., Lowe, V. & Josephs, K. A., Feb 12 2019, In : Neurology. 92, 7, p. e710-e722

Research output: Contribution to journalArticle

Primary Progressive Aphasia
Semantics
Amyloid
Alzheimer Disease
Temporal Lobe
2018
14 Citations (Scopus)

[18F]AV-1451 tau-PET and primary progressive aphasia

Josephs, K. A., Martin, P. R., Botha, H., Schwarz, C., Duffy, J. R., Clark, H., Machulda, M. M., Graff-Radford, J., Weigand, S. D., Senjem, M. L., Utianski, R., Drubach, D., Boeve, B. F., Jones, D. T., Knopman, D. S., Petersen, R. C., Jack, C. R. J., Lowe, V. & Whitwell, J. L., Jan 1 2018, (Accepted/In press) In : Annals of Neurology.

Research output: Contribution to journalArticle

Primary Progressive Aphasia
Semantics
Principal Component Analysis

Clinical Progression in Four Cases of Primary Progressive Apraxia of Speech

Utianski, R., Duffy, J. R., Clark, H., Strand, E. A., Boland, S. M., Machulda, M. M., Whitwell, J. L. & Josephs, K. A., Nov 21 2018, In : American Journal of Speech-Language Pathology. 27, 4, p. 1303-1318 16 p.

Research output: Contribution to journalArticle

Apraxias
Aphasia
speech disorder
Dysarthria
Phonetics
2 Citations (Scopus)

Disrupted functional connectivity in primary progressive apraxia of speech

Botha, H., Utianski, R., Whitwell, J. L., Duffy, J. R., Clark, H., Strand, E. A., Machulda, M. M., Tosakulwong, N., Knopman, D. S., Petersen, R. C., Jack, C. R. J., Josephs, K. A. & Jones, D. T., Jan 1 2018, In : NeuroImage: Clinical. 18, p. 617-629 13 p.

Research output: Contribution to journalArticle

Apraxias
Motor Cortex
Language
Short-Term Memory
Speech Disorders
Primary Progressive Aphasia
Apraxias
speech disorder
Electroencephalography
Aphasia
7 Citations (Scopus)

Longitudinal structural and molecular neuroimaging in agrammatic primary progressive aphasia

Tetzloff, K. A., Duffy, J. R., Clark, H., Strand, E. A., Machulda, M. M., Schwarz, C., Senjem, M. L., Reid, R. I., Spychalla, A. J., Tosakulwong, N., Lowe, V., Jack, C. R. J., Josephs, K. A. & Whitwell, J. L., Jan 1 2018, In : Brain. 141, 1, p. 302-317 16 p.

Research output: Contribution to journalArticle

Primary Progressive Aphasia
Apraxias
Neuroimaging
Aphasia
Motor Cortex
2 Citations (Scopus)

Patterns of Neuropsychological Dysfunction and Cortical Volume Changes in Logopenic Aphasia

Owens, T. E., Machulda, M. M., Duffy, J. R., Strand, E. A., Clark, H., Boland, S., Martin, P. R., Lowe, V., Jack, C. R. J., Whitwell, J. L. & Josephs, K. A., Jan 1 2018, In : Journal of Alzheimer's Disease. 66, 3, p. 1015-1025 11 p.

Research output: Contribution to journalArticle

Primary Progressive Aphasia
Aphasia
Atrophy
Language
Occipital Lobe
9 Citations (Scopus)

Prosodic and phonetic subtypes of primary progressive apraxia of speech

Utianski, R., Duffy, J. R., Clark, H., Strand, E. A., Botha, H., Schwarz, C., Machulda, M. M., Senjem, M. L., Spychalla, A. J., Jack, C. R. J., Petersen, R. C., Lowe, V., Whitwell, J. L. & Josephs, K. A., Sep 1 2018, In : Brain and Language. 184, p. 54-65 12 p.

Research output: Contribution to journalArticle

Apraxias
Phonetics
phonetics
Motor Cortex
Frontal Lobe

Quantitative assessment of grammar in amyloid-negative logopenic aphasia

Tetzloff, K. A., Whitwell, J. L., Utianski, R., Duffy, J. R., Clark, H., Machulda, M. M., Strand, E. A. & Josephs, K. A., Nov 1 2018, In : Brain and Language. 186, p. 26-31 6 p.

Research output: Contribution to journalArticle

Aphasia
speech disorder
Linguistics
Amyloid
grammar
semantics
anxiety
Primary Progressive Aphasia
10 Citations (Scopus)

Regional Distribution, Asymmetry, and Clinical Correlates of Tau Uptake on [18F]AV-1451 PET in Atypical Alzheimer's Disease

Tetzloff, K. A., Graff-Radford, J., Martin, P. R., Tosakulwong, N., Machulda, M. M., Duffy, J. R., Clark, H., Senjem, M. L., Schwarz, C., Spychalla, A. J., Drubach, D., Jack, C. R. J., Lowe, V., Josephs, K. A. & Whitwell, J. L., Jan 1 2018, In : Journal of Alzheimer's Disease. 62, 4, p. 1713-1724 12 p.

Research output: Contribution to journalArticle

Hospital Distribution Systems
Positron-Emission Tomography
Atrophy
Alzheimer Disease
Pathology
11 Citations (Scopus)

Tau-PET imaging with [18F]AV-1451 in primary progressive apraxia of speech

Utianski, R., Whitwell, J. L., Schwarz, C., Senjem, M. L., Tosakulwong, N., Duffy, J. R., Clark, H., Machulda, M. M., Petersen, R. C., Jack, C. R. J., Lowe, V. & Josephs, K. A., Feb 1 2018, In : Cortex. 99, p. 358-374 17 p.

Research output: Contribution to journalArticle

Apraxias
Positron-Emission Tomography
Aphasia
Motor Cortex
Progressive Supranuclear Palsy
3 Citations (Scopus)
Primary Progressive Aphasia
Apraxias
Frontal Lobe
Tauopathies
Parietal Lobe
2017
2 Citations (Scopus)

Neurogenic orofacial weakness and speech in adults with dysarthria

Solomon, N. P., Makashay, M. J., Helou, L. B. & Clark, H., Jan 1 2017, In : American Journal of Speech-Language Pathology. 26, 3, p. 951-960 10 p.

Research output: Contribution to journalArticle

Dysarthria
Tongue
Speech Intelligibility
Muscle Weakness
Speech Disorders
5 Citations (Scopus)

Predicting clinical decline in progressive agrammatic aphasia and apraxia of speech

Whitwell, J. L., Weigand, S. D., Duffy, J. R., Clark, H., Strand, E. A., Machulda, M. M., Spychalla, A. J., Senjem, M. L., Jack, C. R. J. & Josephs, K. A., Nov 28 2017, In : Neurology. 89, 22, p. 2271-2279 9 p.

Research output: Contribution to journalArticle

Apraxias
Aphasia
Parkinsonian Disorders
Broca Aphasia
Corpus Striatum
15 Citations (Scopus)

Temporal acoustic measures distinguish primary progressive apraxia of speech from primary progressive aphasia

Duffy, J. R., Hanley, H., Utianski, R., Clark, H., Strand, E., Josephs, K. A. & Whitwell, J. L., May 1 2017, In : Brain and Language. 168, p. 84-94 11 p.

Research output: Contribution to journalArticle

Primary Progressive Aphasia
Apraxias
speech disorder
Acoustics
acoustics
2016
7 Citations (Scopus)

Tracking the development of agrammatic aphasia: A tensor-based morphometry study

Whitwell, J. L., Duffy, J. R., Machulda, M. M., Clark, H., Strand, E. A., Senjem, M. L., Gunter, J. L., Spychalla, A. J., Petersen, R. C., Jack, C. R. J. & Josephs, K. A., Mar 22 2016, (Accepted/In press) In : Cortex.

Research output: Contribution to journalArticle

Aphasia
Broca Aphasia
Apraxias
Thalamus
Putamen
2015
6 Citations (Scopus)

Effects of age, sex, and body position on orofacial muscle tone in healthy adults

Dietsch, A. M., Clark, H., Steiner, J. N. & Solomon, N. P., Jan 1 2015, In : Journal of Speech, Language, and Hearing Research. 58, 4, p. 1145-1150 6 p.

Research output: Contribution to journalArticle

Muscles
quantification
age group
diagnostic
interaction
26 Citations (Scopus)
Apraxias
Acoustics
Nervous System
acoustics
speech disorder
2014
8 Citations (Scopus)

Clinical and imaging characterization of progressive spastic dysarthria

Clark, H., Duffy, J. R., Whitwell, J. L., Ahlskog, J. E., Sorenson, E. J. & Josephs, K. A., Mar 2014, In : European Journal of Neurology. 21, 3, p. 368-376 9 p.

Research output: Contribution to journalArticle

Dysarthria
Motor Cortex
Neurodegenerative Diseases
Positron-Emission Tomography
Babinski's Reflex
10 Citations (Scopus)

NMDA receptor encephalitis causing reversible caudate changes on MRI and PET imaging

Tobin, W., Strand, E. A., Clark, H., Lowe, V., Robertson, C. E. & Pittock, S. J., 2014, In : Neurology: Clinical Practice. 4, 6, p. 470-473 4 p.

Research output: Contribution to journalArticle

Encephalitis
N-Methyl-D-Aspartate Receptors
9 Citations (Scopus)

Perceptual and instrumental assessments of orofacial muscle tone in dysarthric and normal speakers

Dietsch, A. M., Solomon, N. P., Sharkey, L. A., Duffy, J. R., Strand, E. A. & Clark, H., 2014, In : Journal of Rehabilitation Research and Development. 51, 7, p. 1127-1142 16 p.

Research output: Contribution to journalArticle

Dysarthria
Tongue
Muscles
Facial Muscles
Masticatory Muscles
50 Citations (Scopus)

The apraxia of speech rating scale: A tool for diagnosis and description of apraxia of speech

Strand, E. A., Duffy, J. R., Clark, H. & Josephs, K. A., Sep 1 2014, In : Journal of Communication Disorders. 51, p. 43-50 8 p.

Research output: Contribution to journalArticle

Apraxias
rating scale
Language Disorders
Speech Disorders
Reproducibility of Results
12 Citations (Scopus)

Training Effects of the Effortful Swallow Under Three Exercise Conditions

Clark, H. & Shelton, N., Sep 28 2014, In : Dysphagia. 29, 5, p. 553-563 11 p.

Research output: Contribution to journalArticle

Swallows
Exercise
Pressure
Tongue
Deglutition
1 Citation (Scopus)

Volumes of discrete sips from straws of varying internal diameters

Clark, H., Anderson, C. C. & Hietpas, F., Feb 1 2014, In : American Journal of Speech-Language Pathology. 23, 1, p. 84-89 6 p.

Research output: Contribution to journalArticle

Deglutition Disorders
water
Water
2013

Muscle isolations

Clark, H., Oct 1 2013, ASHA Leader, 18, 10 OCT.

Research output: Contribution to specialist publicationArticle

Muscles
1 Citation (Scopus)
Pressure
Muscles
Electromyography
Drinking
2012
80 Citations (Scopus)

Age and sex differences in orofacial strength

Clark, H. & Solomon, N. P., Mar 1 2012, In : Dysphagia. 27, 1, p. 2-9 8 p.

Research output: Contribution to journalArticle

Tongue
Sex Characteristics
Cheek
Lip
Deglutition Disorders
30 Citations (Scopus)

Specificity of training in the lingual musculature

Clark, H., Apr 1 2012, In : Journal of Speech, Language, and Hearing Research. 55, 2, p. 657-667 11 p.

Research output: Contribution to journalArticle

Tongue
Exercise
endurance
Deglutition
Healthy Volunteers
2010
5 Citations (Scopus)

Quantifying orofacial muscle stiffness using damped oscillation

Solomon, N. P. & Clark, H., Dec 1 2010, In : Journal of Medical Speech-Language Pathology. 18, 4, p. 120-124 5 p.

Research output: Contribution to journalArticle

Tongue
Cheek
Muscles
Motor Neurons
Dysarthria
2 Citations (Scopus)
Compliance
Muscles
Dysarthria
Ice
Therapeutic Uses
2009
48 Citations (Scopus)

Effects of directional exercise on lingual strength

Clark, H., O'Brien, K., Calleja, A. & Corrie, S. N., Aug 1 2009, In : Journal of Speech, Language, and Hearing Research. 52, 4, p. 1034-1047 14 p.

Research output: Contribution to journalArticle

Tongue
Exercise
Resistance Training
Cheek
social isolation
61 Citations (Scopus)

Evidence-based systematic review: Effects of neuromuscular electrical stimulation on swallowing and neural activation

Clark, H., Lazarus, C., Arvedson, J., Schooling, T. & Frymark, T., Nov 1 2009, In : American Journal of Speech-Language Pathology. 18, 4, p. 361-375 15 p.

Research output: Contribution to journalArticle

Deglutition
Electric Stimulation
activation
evidence
Research
2008
17 Citations (Scopus)

Assessment of orofacial strength in patients with dysarthria

Solomon, N. P., Clark, H., Makashay, M. J. & Newman, L. A., Dec 1 2008, In : Journal of Medical Speech-Language Pathology. 16, 4, p. 251-258 8 p.

Research output: Contribution to journalArticle

Dysarthria
Tongue
Speech-Language Pathology
Pressure
Cheek
12 Citations (Scopus)

The role of strength training in speech sound disorders

Clark, H., Nov 1 2008, In : Seminars in Speech and Language. 29, 4, p. 276-283 8 p.

Research output: Contribution to journalArticle

Resistance Training
Exercise
Dental Articulators
Education
Speech Disorders
17 Citations (Scopus)

Visuomotor tracking abilities of speakers with apraxia of speech or conduction aphasia

Robin, D. A., Jacks, A., Hageman, C., Clark, H. & Woodworth, G., Aug 1 2008, In : Brain and Language. 106, 2, p. 98-106 9 p.

Research output: Contribution to journalArticle

Conduction Aphasia
Apraxias
Aptitude
speech disorder
ability
2003
86 Citations (Scopus)

Relationships among subjective and objective measures of tongue strength and oral phase swallowing impairments

Clark, H., Henson, P. A., Barber, W. D., Stierwalt, J. & Sherrill, M., Jan 1 2003, In : American Journal of Speech-Language Pathology. 12, 1, p. 40-50 11 p.

Research output: Contribution to journalArticle

Deglutition
Tongue
rating
manipulation
Mastication
2001
19 Citations (Scopus)

Motor control in children and adults during a non-speech oral task

Clark, H., Robin, D. A., McCullagh, G. & Schmidt, R. A., Jan 1 2001, In : Journal of Speech, Language, and Hearing Research. 44, 5, p. 1015-1025 11 p.

Research output: Contribution to journalArticle

Songbirds
Resource Allocation
Lip
Jaw
Learning
1998
32 Citations (Scopus)

Generalized motor programme and parameterization accuracy in apraxia of speech and conduction aphasia

Clark, H. & Robin, D. A., Jan 1 1998, In : Aphasiology. 12, 7-8, p. 699-713 15 p.

Research output: Contribution to journalArticle

Conduction Aphasia
Apraxias
speech disorder
Jaw
control theory