perception of a sensory experience can change even though the input remains the same
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Perception of a sensory experience can change even though the input remains the same.
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Agnosia - failure of perception
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Pohl, W., Dissociation of spatial discrimination deficits following frontal and parietal lesions in monkeys, Journal of Comparative and
Physiological Psychology 82 (1973): 227–239. Copyright © 1973 by the American Psychological Association. Adapted with permission.
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Koh
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Ada
pted
from
Rob
inso
n, D
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and
Pete
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The
pulv
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and
vis
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Parietal Cortex
W. W. NortonSingle neuron inferior temporal cortex
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Mapping the Auditory System in Rhesus
Monkeys
NIMH, July 2002
University of Iowa
NeuroscienceProgram
The University of IowaDepartment of Psychology
Behavioral and Cognitive Neuroscience
Auditory cortexUnfolded view of
supratemporal plane and adjoining STG.
BeltParabelt
Core
Kaas and Hackett, PNAS 2000
Auditory Projection System
Lower Brainstem
Lower Brainstem
IC
MGB
IC
Early Auditory
Areas
MGB
Early Auditory
Areas
Auditory Projection System
Lower Brainstem
Lower Brainstem
IC
MGB
IC
Early Auditory
Areas
MGB
Early Auditory
Areas
Corpus Callosum,Anterior & Posterior
Commissures
Tectal Commissures
Lower Brainstem
Lower Brainstem
MGB
Early Auditory
Areas
MGB
Early Auditory
AreasForebrain Comm.
Tectal Comm. ICIC
Intact side 'Deaf' side
Methods
Speakers 2-DG injected intravenously
Monkey listens passively for 45 min
Wide variety of acoustic stimuli
Brain prepared for autoradiography
LCGU measured in ROIs throughout brain
ROIs compared for hemispheric asymmetries
Three surgically prepared monkeys
2 DG in Intact (left) and Deafferented (right) Hemisphere
Early auditory areas
MGB
IC
Columns of 2-DG activation in rSTG
Metabolic Mapping of Visual Cortex
Metabolic Mapping of Auditory Cortex
Overlap of Auditory and Visual Maps
Auditory and Visual Processing Streams
Parabelt projections to prefrontal cortex
Romanski et al., Nature Neuroscience, 1999
Left Hemisphere Right Hemisphere
Superior Temporal Gyrus (STG)(n=7 monkeys)
12
34 5
% o
f Who
le B
rain
Act
ivity
Monkey Vocalizations
Complex Sounds and Vocalizations
Complex Sounds No Vocalizations
Ambient Background Sound
70
80
90
100
110
120
130
Human Vocalizations
High
Low
High
Low
Monkey Vocalizations
p<0.001
*
Complex Sounds and
Vocalizations
p<0.01
*
FDG Activity in the Dorsal Temporal Pole
70
80
90
100
Ambient Background
Noise
% o
f Who
le B
rain
Act
ivity
Left Hemisphere Right Hemisphere
Monkey Vocalizations
p<0.001
*
Complex Sounds and
Vocalizations
p<0.01
*
FDG Activity in the Dorsal Temporal Pole
70
80
90
100
Ambient Background
Noise
Left Hemisphere Right Hemisphere
Complex Sounds No Vocalizations
% o
f Who
le B
rain
Act
ivity