CANS Testing Exam Questions With Verified Answers

CANS Testing Exam Questions With Verified Answers What are the 4 categories of CANS dysfunction tests? - answer1. Dichotic speech tests 2. Binaural interaction tests 3. Temporal ordering tests 4. Monaural low redundancy speech tests On what physiologic premise are dichotic speech tests based? - answerOn the physiologic premise that contralateral pathways are more numerous and robust than ipsilateral pathways Which means that if we use monaural stimulation, the information can be processed equally well by both ipsilateral and contralateral pathways. But in dichotic stimulation situations, the weaker ipsilateral pathways are believed to be suppressed by the stronger contralateral pathways. In dichotic testing, where do we expect the deficit to be if one hemisphere is compromised? - answerat the contra ear Where do we expect the deficit to be if the compromised hemisphere is the person's language- dominant hemisphere? - answerWe may see bilateral deficits or a deficit at the contra ear. What type of lesion are dichotic tests sensitive to? - answerAll dichotic tests are sensitive to cortical lesions, but, generally, they don't tend to be sensitive to brainstem lesions. What are the 5 types of dichotic speech tests? - answer1. Dichotic digits 2. Dichotic CVs 3. Dichotic rhymes 4. Staggered spondaic words 5. Competing sentences Explain how the dichotic digits test works. - answerPresent 4 digits simultaneously (2 to each ear) at 50 dB SL relative to spondee threshold. Patient repeats back all the digits they hear. Derive a % correct for each ear and compare to norms. What are the norms for dichotic digits? - answer11 years old or older: abnormal = <90% at either ear What result would you expect on dichotic digits for a person with a right temporal lobe lesion? - answer<90% correct for the left ear Why would you expect a bilateral deficit in a dichotic speech test for patients with left temporal lobe lesions? - answerMost people's left hemisphere is the language-dominant hemisphere, and they have to use language to report their answers. When would a left hemisphere lesion maybe no show a bilateral deficit in dichotic speech tests? - answerIf the lesion is deep within the left hemisphere,a s they tend to affect the corpus callosum. Explain how the dichotic CVs test works. - answerPresent CVs dichotically at 50 dB SL relative to spondee thresholds; can be presented simultaneously or in lead-lag fashion. Patient repeats what they heard. Derive a % correct for each ear and compare to norms. What are the norms for dichotic CVs? - answerAbnormal adult performance = <43% for either ear in simultaneous condition OR <90% for either ear in lead-lag condition Is simultaneous or lead-lag presentation more difficult for dichotic CVs? - answersimulatenous What is lead-lag fashion? - answerWhen you are presenting stimuli dichotically, you introduce one to one ear slightly before the other CV is introduced to the other ear. What are some commonly used CVs in dichotic CVs? - answerba, pa, ta, ka, ga, da Explain how dichotic rhymes works. - answerPresent 30-50 pairs of monosyllabic words that begin with a stop consonant and differ only in the initial consonant (i.e., bat, cat) at 50 dB SL relative to spondee thresholds. Patient repeats what they hear. Derive a % correct for each ear and compare to norms.