{"doi":"10.1002/mus.21990","title":"Jaw muscle weakness: A differential indicator of neuromuscular weakness—Preliminary observations","abstract":"<jats:title>Abstract</jats:title><jats:sec><jats:title>Introduction:</jats:title><jats:p>Flaccid quadriparesis is a common neurological problem. Guillain–Barré syndrome Guillain‐Barre syndrome (GBS), polymyositis/dermatomyositis (PM/DM), generalized myasthenia gravis (MG), and hypokalemic periodic paralysis (HPP) constitute the majority of cases of flaccid quadriparesis. Few patients from any of these disease groups lack the cardinal clinical features. We established clinical marker(s) that might have significant discriminating power for diagnosis.</jats:p></jats:sec><jats:sec><jats:title>Methods:</jats:title><jats:p>Forty‐six patients satisfied all of our criteria. Cases were evaluated clinically followed by laboratory and electrophysiological study, and, in selected cases, muscle histopathology.</jats:p></jats:sec><jats:sec><jats:title>Results:</jats:title><jats:p>Twenty‐four patients had GBS, 9 had MG, 7 had PM/DM, and 6 had HPP. Jaw‐opening weakness was found in 71.4% of PM/DM, 83.3% of HPP, and 4.1% of GBS cases. Jaw‐closing weakness was found in 88.8% of MG cases.</jats:p></jats:sec><jats:sec><jats:title>Conclusions:</jats:title><jats:p>Presence of jaw‐closing weakness pointed toward MG, whereas presence of jaw‐opening weakness suggested muscle disease (PM/DM and HPP). GBS patients very rarely had jaw muscle weakness. Muscle Nerve, 2011</jats:p></jats:sec>","journal":"Muscle &amp; Nerve","year":2011,"id":680747,"datarank":0.4887144807032224,"base_score":3.258096538021482,"endowment":3.258096538021482,"self_citation_contribution":0.4887144807032224,"citation_network_contribution":0.0,"self_endowment_contribution":0.4887144807032224,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":25,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1778585,"name":"Debashis Sanyal","orcid":null,"position":1,"is_corresponding":false},{"id":1778584,"name":"Sandip Pal","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"Jaw muscle weakness: A differential indicator of neuromuscular weakness—Preliminary observations","abstract":"<jats:title>Abstract</jats:title><jats:sec><jats:title>Introduction:</jats:title><jats:p>Flaccid quadriparesis is a common neurological problem. Guillain–Barré syndrome Guillain‐Barre syndrome (GBS), polymyositis/dermatomyositis (PM/DM), generalized myasthenia gravis (MG), and hypokalemic periodic paralysis (HPP) constitute the majority of cases of flaccid quadriparesis. Few patients from any of these disease groups lack the cardinal clinical features. We established clinical marker(s) that might have significant discriminating power for diagnosis.</jats:p></jats:sec><jats:sec><jats:title>Methods:</jats:title><jats:p>Forty‐six patients satisfied all of our criteria. Cases were evaluated clinically followed by laboratory and electrophysiological study, and, in selected cases, muscle histopathology.</jats:p></jats:sec><jats:sec><jats:title>Results:</jats:title><jats:p>Twenty‐four patients had GBS, 9 had MG, 7 had PM/DM, and 6 had HPP. Jaw‐opening weakness was found in 71.4% of PM/DM, 83.3% of HPP, and 4.1% of GBS cases. Jaw‐closing weakness was found in 88.8% of MG cases.</jats:p></jats:sec><jats:sec><jats:title>Conclusions:</jats:title><jats:p>Presence of jaw‐closing weakness pointed toward MG, whereas presence of jaw‐opening weakness suggested muscle disease (PM/DM and HPP). GBS patients very rarely had jaw muscle weakness. Muscle Nerve, 2011</jats:p></jats:sec>","is_dataset_classified":null,"base_score":3.258096538021482,"endowment":3.258096538021482,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"21607965","pmcid":null,"openalex_id":"https://openalex.org/W2063693311","authors":[],"funders":[],"total_grants":0,"fwci":1.5004,"citation_percentile":0.82322951,"influential_citations":0,"citation_trend":[{"year":2012,"count":3},{"year":2014,"count":5},{"year":2015,"count":1},{"year":2017,"count":3},{"year":2018,"count":1},{"year":2019,"count":1},{"year":2020,"count":1},{"year":2021,"count":1},{"year":2022,"count":2},{"year":2023,"count":1},{"year":2024,"count":1},{"year":2025,"count":4},{"year":2026,"count":1}],"oa_status":"closed","license":"http://onlinelibrary.wiley.com/termsAndConditions#vor","oa_locations":[{"url":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fmus.21990","host_type":"publisher"},{"url":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/mus.21990","host_type":"publisher"},{"url":"https://doi.org/10.1002/mus.21990","host_type":"journal"},{"url":"https://pubmed.ncbi.nlm.nih.gov/21607965","host_type":"repository"}],"fields_of_study":["Peripheral Neuropathies and Disorders","Inflammatory Myopathies and Dermatomyositis","Myasthenia Gravis and Thymoma","Adolescent","Adult","Aged","Child","Child, Preschool","Dermatomyositis","Diagnosis, Differential","Female","Guillain-Barre Syndrome","Humans","Hypokalemic Periodic Paralysis","Male","Masseter Muscle","Middle Aged","Muscle Weakness","Myasthenia Gravis","Neuromuscular Diseases","Predictive Value of Tests","Prospective Studies","Quadriplegia","Young Adult"],"mesh_terms":["Adolescent","Adult","Aged","Child","Child, Preschool","Dermatomyositis","Diagnosis, Differential","Female","Humans","Male","Masseter Muscle","Middle Aged","Myasthenia Gravis","Neuromuscular Diseases","Predictive Value of Tests","Prospective Studies","Quadriplegia","Muscle Weakness","Guillain-Barre Syndrome","Hypokalemic Periodic Paralysis","Young Adult"],"keywords":["Weakness","Medicine","Muscle weakness","Guillain-Barre syndrome","Myasthenia gravis","Proximal muscle weakness","Polymyositis","Dermatomyositis","Paralysis","Surgery","Anatomy","Muscle biopsy","Internal medicine","Pediatrics","Biopsy"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Reduced inequalities"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-08-17T16:00:52.603489Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}