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Unformatted text preview: Biopsychology Exam 4 Lecture 18- Language and Aphasias: Language is localized and distributed (small parts of cortex and many regions) Paul BROCAs patient Tan: production impairment , but comprehension relatively intact (impairment because of disease); suffered from RIGHT HEMIPARESIS (weaken of right arm and leg because of damage to anterior part of left hemisphere movements are lateralized across the body) Carl WERNICKE: studied 2 patients with fluent speech , but nonsensical sound/words/sentences ; damage to posterior region of superior temporal gyrus You must hear to understandprimary auditory cortex next to Wernickes Area APHASIA: disorders of language apparent in speech, writing (AGRAPHIA) or reading (ALEXIA) produced by injury to brain area specialized in these functions Impairments are not always due to aphasiasdisturbances may be due to: intellectual impairment, loss of sensory input (vision, hearing), paralysis/incoordination of muscles in mouth (ANARTHIA), or hand paralysis affecting writing PRIMARY APHASIA: problems with language-processing mechanisms (purely due to lang. input in brain ) SECONDARY APHASIA: memory impairments, attention disorders, perceptual problems DISORDERS IN COMPREHENSION: 1. Poor auditory comprehension (cant understand speech) 2. Poor visual comprehension (cant read) DISORDERS IN PRODUCTION: 1. Poor articulation 2. ANOMIA: word finding deficit 3. PARAPHASIA: unintended words or phrases; errors producing specific words 4. Loss of grammar/syntax 5. Inability to repeat aurally presented material (cant repeat sentences exactly the same) 6. Low verbal fluency (ex: asked to say as many words as they can that start with f and they can only say a few) 7. AGRAPHIA 8. APROSIDIA: loss of tone in voice APHASIA CLASSIFICATION TEST PARAMETERS: 1. spontaneous speech 2. auditory comprehension (can they understand commands?) 3. verbal repetition (ask them to repeat words you just said) THREE BROAD CATAGORIES OF APHASIA: 1. NONFLUENT APHASIA : difficulties in articulation but relatively good auditory verbal comprehension (ex: Brocas severe & Brocas mild) BROCAS APHASIA /Expressive aphasia- nonfluent speech, short phrases with lots of pauses, makes errors, repetitious errors in grammar , omits function words (verbsTELEGRAPHIC SPEECH); poor repetition; somewhat good comprehension (problems arise with differences in syntax); *can repeat some...
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This note was uploaded on 02/18/2011 for the course PSYCH 230 taught by Professor Unkown during the Winter '08 term at University of Michigan.
- Winter '08