Chapter 19 Flashcards
Cerebral Cortex functions
Higher mental functions
Reasoning Memory Language Speech Calculations Praxis Recognition of objects
Frontal Lobe
Contains primary motor cortex Carries map of the contralateral side of the body Contains premotor cortex Broca's area (Broca aphasia) Executive functions Working memory
Frontal Love Clinical Correlates
lack of inhibition of speech
Individuals may have a totally changed personality, poor impulse control and sociopathic behavior
Lesions resemble psychiatric disorders
Left Parietal Lobe deficits
Agraphia
Acalculia
Right left confusion
Finger agnosia
Lesions of right parietal lobe
Left side neglect Denial of the presence of a motor deficit (anosognosia) Dressing apraxia Inability to draw or read a map difficulty with spatial relations Lack of emotional intonation of speech
temporal lobe
Primary auditory cortex
Wernicke
Pure word deafness
auditory agnosia
Appreciation of rhythm and musical qualities
Bilateral lesions can cause loss of new learning and recent memory
Occipital Lobe
Primary visual cortex
Contralateral hemianopic visual field defect in both eyes
Bilateral may cause cortical blindness
Motor Speech Disorders
Dysarthria
apraxia
Dysarthria Types
Flaccid Spastic Ataxic Hypokinetic Hyperkinetic mixed
Apraxia
Abnormal articulation of sequences of phonemes
Inconsistent errors
Inability to program sequences of sounds especially consonants
Difficulty with initial consonants
Groping behavior
Apraxia of speech is rarely seen without aphasia
Broca aphasia
Aphasia
Acquired disorder of language functions secondary to brain disease
Broca Wernicke Global Conduction Anomic Transcortical (motor and sensory)
Broca
Nonfluent dysarthria Ungrammatical speech Anomia Auditory comprehension is relatively intact Difficulty comprehending complex syntax Writing deficits
Wernicke
Fluent Verbalizations are meaningless Overabundance of stock phrases and idioms Numerous verbal paraphasias Neologisms Jargon speech Auditory comprehension severely impaired Impaired repetition Reading comprehension Writing impairments without hemiparesis
Global Aphasia
Sum of the deficits of Broca and Wernicke
Nonfluent or mute
Impaired comprehension
All elements of language are severely impaired
Conduction Aphasia
Occurs in less that 10% of aphasia
Repetition is the most severely affecting modality
Spontaneous speech is fluent with literal paraphasias
Auditory comprehension is normal