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neuro ch 8
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8
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12/15/2005

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Term
volley coding
Definition
action potentials in a large number of auditory nerve axons become phase-locked to the signal, occuring at identical times each cycle. Collectively, the population of neurons reproduces the frequency of the signal in action potentials
Term
sound shadow
Definition
frequencies above 2 Hz produce a shadow which results in intensity differences between the two ears
Term
aphasias
Definition
disturbances in language function
Term
phonomic errors
Definition
select correct words but make errors in assembling the constituent sounds
Term
anomia
Definition
difficulty finding words
Term
phonetic errors
Definition
producing sounds that normally do not occur in the patient's native language - foreign accent syndrome
Term
Broca's aphasia
Definition
nonfluent aphasia - labored, slow speech - comprehension intact - patient aware of deficit - reading is laborious, writing has same defects as speech - posterior end of inferior frontal gyrus
Term
wernicke's aphasia
Definition
fluent aphasia - excessive speach with little semantic content - impaired comprehension - writing parallels language deficits - patient not aware of deficit - superior temporal gyrus
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