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Bio Psych test 4 (Ch. 19)
Terms in this set (19)
the cerebral hemispheres are specialized for different functions.
hemispheres are disconnected due to the surgical severing of the corpus callosum to alleviate seizures
Right ear advantage
right-handed persons identify verbal stimuli delivered to the right ear more accurately than verbal stimuli delivered to the left.
may reflect the left hemisphere's specialization for language.
Results of the tachistoscope test
visual perception of linguistic stimuli is measured by this
- the left hemisphere (right visual field) shows better recognition of words and letters.
- the right hemisphere (left visual field) shows better recognition of faces and geometric forms.
Results of the Wada test
determines involvement of hemispheres in language by anesthetizing each hemisphere separately using sodium amytal.
face blindness, people fail to recognize familiar faces, including their own. bilateral damage to the fusiform gyrus causes complete prosopagnosia.
less severe damage to the left hemisphere of the brain may cause this. insertion of incorrect sounds or words.
-slow non fluent speech
- good comprehension
results for damage to the Broca's area.
- non fluent speech
- variable paraphasia
- poor repetition
- poor naming
total or near total loss of the ability to understand or produce language
- fluent speech
- good comprehension
- common paraphasia
Connectionist model of aphasia
Also called Wernicke-Geschwind model. A theory proposing that left-hemisphere language deficits result from disconnection between the brain regions in a language network, each of which serves a particular linguistic function.
Sensitive period for language
early on in a childs life. up until 7 years of age is the most sensitive learning period for language.
reading disorder attributed to brain impairment
-compared with control subjects people with dyslexia show diminished activation of the left posterior regions including the superior temporal lobe and gyrus.
can occur in adults after injury to the left hemisphere
an acquired dyslexia in which a person reads a word as another semantically related word
another acquired dyslexia when the person attends only to the fine details of reading
occurs in 5% of the general population
surgery that removes the malfunctioning brain tissue and saves the life of a child, but it also produces severe symptoms of its own.
- complete paralysis of one side
- visual impairments
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