| Abulia | 
          Functional 
            errors of omission: failing to perform activities to meet basic human 
            needs: 
            inability to make decisions; lack of will or willpower. | 
        
         
          | Acalculia | 
          inability 
            to do simple arithmetical calculations | 
        
         
          | Anomia | 
          inability 
            to recall or recognize names of objects | 
        
         
          | Aphasia | 
           
            loss of power of expression by speech, writing, or signs and/or loss 
            of comprehension of spoken language or written language due to brain 
            injury or pathology | 
        
         
          | Apraxia | 
          loss 
            of ability to carry out familiar, purposeful movements in the absence 
            of paralysis or other motor or sensory impairments, especially the 
            inability to make proper use of an object | 
        
         
          | Apraxic 
            agraphia | 
          inability 
            to express oneself in writing due to apraxia | 
        
         
          | Asimultanaanosia | 
          Inability 
            to visually integrate the components of ordinarily complex scene into 
            a coherent whole | 
        
         
          | Atopoaraphaonosia | 
          inability 
            to recognize familiar faces | 
        
         
          | Aural 
            comprehension | 
          understanding 
            of stimuli perceived by the ear | 
        
         
          | Constructional 
            praxis | 
           
            inability to copy simple drawings or reproduce patterns of blocks 
            or matchstick constructions | 
        
         
          | Dysarthria | 
          imperfect 
            articulation of speech due to muscular weakness resulting from damage 
            to the central or peripheral nervous system | 
        
         
          | Echolalia | 
           
            stereotyped repetition of another person's words or phrases | 
        
         
          | Executive 
            function | 
          ability 
            to set a goal, make decisions, and implement appropriate activities 
            towards meeting that goal. | 
        
         
          | Ocular 
            apraxia | 
          inability 
            to voluntarily direct their gaze to a target of visual interest | 
        
         
          | Optic 
            ataxia | 
          the 
            inability to benefit from visual guidance in reaching for an object | 
        
         
          | Paraphasia | 
          speech 
            defect characterized by disorderly arrangement of spoken words | 
        
         
          | Phonemic | 
          speech 
            sounds that are the basic units of speech (i.e. "leviator' instead 
            of 'elevator;' or .grontologs" instead of "gerontology") | 
        
         
          | Praxis | 
           
            the performance of an action; "doing" | 
        
         
          | Prosody | 
          the 
            variations in stress, pitch, and rhythms of speech that convey meanings | 
        
         
          | Prosopagnos'ia | 
          inability 
            to recognize faces | 
        
         
          | Semantic 
            paraphasia | 
          substituting 
            a similar word for an object, i.e., "staple" for 'paper 
            clip' (Caselli, 1995, p. 3) | 
        
         
          | Semantic 
            precision  | 
          use 
            of words appropriate or significant to the meaning of the intended 
            communication. i.e. substituting "machine" for "automobile". | 
        
         
          | Verbal 
            memory | 
           
            ability to remember speech | 
        
         
          | Visual 
            memory | 
          Ability 
            to remember what is seen  |