Lecture 26 Flashcards
define amusia
deficit in musical perception that cannot be attributed to a more general auditory dysfunction or intellectual disability
pitch based amusia affects how much of the population
1.5%
_______ is a type of amusia that applies when people are born with the deficit
congenital amusia
what is the opposite of congenital amusia
acquired amusia
true or false - people with amusia can slightly detect deviations in pitch that are very small
false - they cannot detect deviations at all
what are semitones
it is the smallest musical interval
what is the most commonly used tool to diagnose amusia
montreal battery of evaluation of amusia
what does the MBEA assess
tonal knowledge, rhythm processing, musical working memory
patients with amusia demonstrate a phenomenon that is referred to as ______
perception without awareness
which ERPs do amusia patients demonstrate
MMN, N100 and ERAN
which two EPRs are different in amusia patients
P3b and P600
what are P3b and P600 associated with
tied to conscious detection of a deviant tone
what 3 areas in the right frontotemporal network have observed abnormalities in amusia patients
right inferior frontal gyrus
right superior temporal gyrus
right arucate fasciculus
match the area with its function
right inferior frontal gyrus
broca’s area -> language production
match the area with its function
right superior temporal gyrus
auditory association cortex
match the area with its function
right arcuate fasciculus
connects temporal cortex to parietal and frontal
what features are found in the abnormalities in the frontotemporal network
white and grey matter and connectivity patterns
what is the model that explains the observed deficits in the right frontotemporal network
inferior frontal gyrus usually processes the signals from the superior temporal gyrus through top down contributions -> but in people with amusia -> interferences with processes that allow conscious detection
_________ (a type of disorder) is related to deficits in time perception
beat finding disorder
in the case study about beat finding disorders… what did people have a difficulty with
matching the tempo of a dance like bouncing movement with music
give an example of perception action coupling
a case study’s patient’s tapping was comparable to controls for typical stimuli but his performance differed from controls when there were unpredictable temporal changes
what does acquired amusia typically result from
from lesions in the superior temporal gyrus and insula
what is the insula important for
integrating inputs from across modalities, salience detection and self awareness
when lesions only affect either pitch perception or perception of temporally relevant information, what does this suggest
the brain has dissociable neural mechanisms
Liegeois-Chauvel et al. studied patients who had surgery for epilepsy… what did he find in their brain
the right hemisphere parts had impaired contour and pitch interval perception
-> left hemisphere parts had impaired only pitch interval perception
what impaired areas of the brain were associated with impaired rhythm perception
right temporal lobe, planum temporale and insula
when the right anterior lobe was removed in the brain, what did Liegeois Chauvel et al. find
there was impaired motor processing
bilateral lesions can impair what?
melody perception
