{"id":5462,"date":"2025-12-09T14:32:12","date_gmt":"2025-12-09T19:32:12","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/?post_type=chapter&#038;p=5462"},"modified":"2025-12-09T23:35:52","modified_gmt":"2025-12-10T04:35:52","slug":"aphasia-and-related-neurological-language-disorders","status":"web-only","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/chapter\/aphasia-and-related-neurological-language-disorders\/","title":{"raw":"11p10  Aphasia and Related Neurological Language Disorders","rendered":"11p10  Aphasia and Related Neurological Language Disorders"},"content":{"raw":"<h1><strong>Aphasia Overview<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Aphasia<\/strong>: Loss or impairment of language comprehension or expression.<\/li>\r\n \t<li>Usually caused by damage to specific\u00a0<strong>areas of the brain<\/strong>\u00a0involved in language.<\/li>\r\n<\/ul>\r\n<strong>Key Brain Areas<\/strong>\r\n<ul>\r\n \t<li><strong>Wernicke\u2019s area<\/strong>: Located in the\u00a0<strong>left temporal lobe<\/strong>\u00a0(for most people).\r\n<ul>\r\n \t<li>Responsible for\u00a0<strong>language comprehension<\/strong>.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li><strong>Broca\u2019s area<\/strong>: Located in the\u00a0<strong>left frontal lobe<\/strong>.\r\n<ul>\r\n \t<li>Responsible for\u00a0<strong>speech production<\/strong>\u00a0and articulation.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h1><strong>Types of Aphasia:<\/strong><\/h1>\r\n<h1><strong>1.\u00a0 Receptive Aphasia (Wernicke\u2019s Aphasia)<\/strong><\/h1>\r\n<ul>\r\n \t<li>Damage to\u00a0<strong>Wernicke\u2019s area<\/strong> in temporal lobe (usually on left side).<\/li>\r\n \t<li>Person\u00a0<strong>cannot understand<\/strong>\u00a0written or spoken language.<\/li>\r\n \t<li>Speech is\u00a0<strong>fluent<\/strong>\u00a0but\u00a0<strong>meaningless<\/strong>\u00a0(word salad).<\/li>\r\n \t<li>Can\u2019t interpret language\u00a0<strong>correctly<\/strong>.<\/li>\r\n<\/ul>\r\n<h1><strong>2.\u00a0 Expressive Aphasia (Broca\u2019s Aphasia)<\/strong><\/h1>\r\n<ul>\r\n \t<li>Damage to\u00a0<strong>Broca\u2019s area<\/strong>\u00a0in temporal lobe (usually on left side).<\/li>\r\n \t<li>Person\u00a0<strong>can understand<\/strong>\u00a0language but\u00a0<strong>cannot speak or write properly<\/strong>.<\/li>\r\n \t<li>Speech is\u00a0<strong>garbled<\/strong>\u00a0or\u00a0<strong>slow<\/strong>.<\/li>\r\n \t<li>Little or no\u00a0<strong>articulation<\/strong>.<\/li>\r\n<\/ul>\r\n<h1><strong>3.\u00a0 Global Aphasia<\/strong><\/h1>\r\n<ul>\r\n \t<li>Damage to\u00a0<strong>both Wernicke\u2019s and Broca\u2019s areas<\/strong>, or\u00a0<strong>their connecting pathways<\/strong>.<\/li>\r\n \t<li><strong>Severe<\/strong>:\r\n<ul>\r\n \t<li>Cannot understand\u00a0<strong>or<\/strong>\u00a0produce language.<\/li>\r\n \t<li>Results from\u00a0<strong>large strokes<\/strong>\u00a0affecting both regions.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h1><strong>4.\u00a0 Dysphasia (Aphasias of partial loss)<\/strong><\/h1>\r\n<ul>\r\n \t<li>Mild or\u00a0<strong>partial impairments<\/strong>.<\/li>\r\n \t<li><strong>Prefixes<\/strong>:\r\n<ul>\r\n \t<li><strong>a-<\/strong>: without or absent (e.g., aphasia).<\/li>\r\n \t<li><strong>dys-<\/strong>: bad or difficult.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h1><strong>Other Language-Related Disorders<\/strong><\/h1>\r\n<h1><strong>1.\u00a0 Dysarthria<\/strong><\/h1>\r\n<ul>\r\n \t<li>Impaired\u00a0<strong>articulation<\/strong>\u00a0due to\u00a0<strong>damage to cranial nerves<\/strong>\u00a0controlling speech muscles.<\/li>\r\n \t<li>Words tend to be\u00a0<strong>slurred<\/strong>\u00a0or\u00a0<strong>poorly articulated<\/strong>.<\/li>\r\n \t<li>Not a language problem\u00a0<strong>per se<\/strong>\u00a0but\u00a0<strong>muscle control problem<\/strong>.<\/li>\r\n<\/ul>\r\n<h1><strong>2.\u00a0 Agraphia<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Inability to write<\/strong>.<\/li>\r\n \t<li>Results from damage to\u00a0<strong>language or motor pathways<\/strong>\u00a0involved in writing.<\/li>\r\n<\/ul>\r\n<h1><strong>3.\u00a0 Alexia<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Impaired reading ability<\/strong>\u00a0(dyslexia is a related developmental disorder).<\/li>\r\n \t<li>Damage to\u00a0<strong>visual<\/strong>\u00a0or\u00a0<strong>reading centers<\/strong>.<\/li>\r\n<\/ul>\r\n<h1><strong>4.\u00a0 Agnosia<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Inability to recognize objects or people<\/strong>.<\/li>\r\n \t<li>Results from damage to specialized\u00a0<strong>recognition areas<\/strong>\u00a0in the brain.\r\n<ul>\r\n \t<li><strong>Object agnosia<\/strong>: unable to recognize objects.<\/li>\r\n \t<li><strong>Facial (prosopagnosia)<\/strong>: unable to recognize faces.<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li>Example from\u00a0<strong>Oliver Sacks\u2019 cases<\/strong>: patients unable to recognize people or objects due to focal brain damage as depicted in his book \"The Man Who Mistook His Wife for a Hat\".<\/li>\r\n<\/ul>\r\n<h1><strong>Summary<\/strong><\/h1>\r\n<ul>\r\n \t<li><strong>Aphasia<\/strong>\u00a0affects\u00a0<strong>language comprehension and output<\/strong>\u00a0based on lesion location.<\/li>\r\n \t<li><strong>Recognition deficits<\/strong>\u00a0(agnosia) involve\u00a0<strong>perception<\/strong>\u00a0of objects or faces.<\/li>\r\n \t<li>These conditions highlight the\u00a0<strong>specialized functions<\/strong>\u00a0of different brain regions.<\/li>\r\n<\/ul>","rendered":"<h1><strong>Aphasia Overview<\/strong><\/h1>\n<ul>\n<li><strong>Aphasia<\/strong>: Loss or impairment of language comprehension or expression.<\/li>\n<li>Usually caused by damage to specific\u00a0<strong>areas of the brain<\/strong>\u00a0involved in language.<\/li>\n<\/ul>\n<p><strong>Key Brain Areas<\/strong><\/p>\n<ul>\n<li><strong>Wernicke\u2019s area<\/strong>: Located in the\u00a0<strong>left temporal lobe<\/strong>\u00a0(for most people).\n<ul>\n<li>Responsible for\u00a0<strong>language comprehension<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Broca\u2019s area<\/strong>: Located in the\u00a0<strong>left frontal lobe<\/strong>.\n<ul>\n<li>Responsible for\u00a0<strong>speech production<\/strong>\u00a0and articulation.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1><strong>Types of Aphasia:<\/strong><\/h1>\n<h1><strong>1.\u00a0 Receptive Aphasia (Wernicke\u2019s Aphasia)<\/strong><\/h1>\n<ul>\n<li>Damage to\u00a0<strong>Wernicke\u2019s area<\/strong> in temporal lobe (usually on left side).<\/li>\n<li>Person\u00a0<strong>cannot understand<\/strong>\u00a0written or spoken language.<\/li>\n<li>Speech is\u00a0<strong>fluent<\/strong>\u00a0but\u00a0<strong>meaningless<\/strong>\u00a0(word salad).<\/li>\n<li>Can\u2019t interpret language\u00a0<strong>correctly<\/strong>.<\/li>\n<\/ul>\n<h1><strong>2.\u00a0 Expressive Aphasia (Broca\u2019s Aphasia)<\/strong><\/h1>\n<ul>\n<li>Damage to\u00a0<strong>Broca\u2019s area<\/strong>\u00a0in temporal lobe (usually on left side).<\/li>\n<li>Person\u00a0<strong>can understand<\/strong>\u00a0language but\u00a0<strong>cannot speak or write properly<\/strong>.<\/li>\n<li>Speech is\u00a0<strong>garbled<\/strong>\u00a0or\u00a0<strong>slow<\/strong>.<\/li>\n<li>Little or no\u00a0<strong>articulation<\/strong>.<\/li>\n<\/ul>\n<h1><strong>3.\u00a0 Global Aphasia<\/strong><\/h1>\n<ul>\n<li>Damage to\u00a0<strong>both Wernicke\u2019s and Broca\u2019s areas<\/strong>, or\u00a0<strong>their connecting pathways<\/strong>.<\/li>\n<li><strong>Severe<\/strong>:\n<ul>\n<li>Cannot understand\u00a0<strong>or<\/strong>\u00a0produce language.<\/li>\n<li>Results from\u00a0<strong>large strokes<\/strong>\u00a0affecting both regions.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1><strong>4.\u00a0 Dysphasia (Aphasias of partial loss)<\/strong><\/h1>\n<ul>\n<li>Mild or\u00a0<strong>partial impairments<\/strong>.<\/li>\n<li><strong>Prefixes<\/strong>:\n<ul>\n<li><strong>a-<\/strong>: without or absent (e.g., aphasia).<\/li>\n<li><strong>dys-<\/strong>: bad or difficult.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1><strong>Other Language-Related Disorders<\/strong><\/h1>\n<h1><strong>1.\u00a0 Dysarthria<\/strong><\/h1>\n<ul>\n<li>Impaired\u00a0<strong>articulation<\/strong>\u00a0due to\u00a0<strong>damage to cranial nerves<\/strong>\u00a0controlling speech muscles.<\/li>\n<li>Words tend to be\u00a0<strong>slurred<\/strong>\u00a0or\u00a0<strong>poorly articulated<\/strong>.<\/li>\n<li>Not a language problem\u00a0<strong>per se<\/strong>\u00a0but\u00a0<strong>muscle control problem<\/strong>.<\/li>\n<\/ul>\n<h1><strong>2.\u00a0 Agraphia<\/strong><\/h1>\n<ul>\n<li><strong>Inability to write<\/strong>.<\/li>\n<li>Results from damage to\u00a0<strong>language or motor pathways<\/strong>\u00a0involved in writing.<\/li>\n<\/ul>\n<h1><strong>3.\u00a0 Alexia<\/strong><\/h1>\n<ul>\n<li><strong>Impaired reading ability<\/strong>\u00a0(dyslexia is a related developmental disorder).<\/li>\n<li>Damage to\u00a0<strong>visual<\/strong>\u00a0or\u00a0<strong>reading centers<\/strong>.<\/li>\n<\/ul>\n<h1><strong>4.\u00a0 Agnosia<\/strong><\/h1>\n<ul>\n<li><strong>Inability to recognize objects or people<\/strong>.<\/li>\n<li>Results from damage to specialized\u00a0<strong>recognition areas<\/strong>\u00a0in the brain.\n<ul>\n<li><strong>Object agnosia<\/strong>: unable to recognize objects.<\/li>\n<li><strong>Facial (prosopagnosia)<\/strong>: unable to recognize faces.<\/li>\n<\/ul>\n<\/li>\n<li>Example from\u00a0<strong>Oliver Sacks\u2019 cases<\/strong>: patients unable to recognize people or objects due to focal brain damage as depicted in his book &#8220;The Man Who Mistook His Wife for a Hat&#8221;.<\/li>\n<\/ul>\n<h1><strong>Summary<\/strong><\/h1>\n<ul>\n<li><strong>Aphasia<\/strong>\u00a0affects\u00a0<strong>language comprehension and output<\/strong>\u00a0based on lesion location.<\/li>\n<li><strong>Recognition deficits<\/strong>\u00a0(agnosia) involve\u00a0<strong>perception<\/strong>\u00a0of objects or faces.<\/li>\n<li>These conditions highlight the\u00a0<strong>specialized functions<\/strong>\u00a0of different brain regions.<\/li>\n<\/ul>\n","protected":false},"author":1370,"menu_order":16,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":["zoe-soon"],"pb_section_license":"cc-by-nc-sa"},"chapter-type":[],"contributor":[60],"license":[57],"class_list":["post-5462","chapter","type-chapter","status-web-only","hentry","contributor-zoe-soon","license-cc-by-nc-sa"],"part":76,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapters\/5462","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/wp\/v2\/users\/1370"}],"version-history":[{"count":5,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapters\/5462\/revisions"}],"predecessor-version":[{"id":5553,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapters\/5462\/revisions\/5553"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/parts\/76"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapters\/5462\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/wp\/v2\/media?parent=5462"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/pressbooks\/v2\/chapter-type?post=5462"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/wp\/v2\/contributor?post=5462"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/pathophysiology\/wp-json\/wp\/v2\/license?post=5462"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}