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?TABLE: SENSORY DEFECTS REPORTED IN PARKINSON'S DISEASE
VISUAL FUNCTION
CHANGE
AUTHOR
Visual Acuity
usually normal
decline over time with PD
Repka 1996, Jones 1992
PVEP
normal
delay in latency correlate
dependent on spatial freq
improve with L-dopa
Ehle 1982
Kupersmith 1982
Bodis Wollner 1982
Bodis-Wollner 1982
PERG
abnormal
decreased amplitude
P50 delayed/corrected by L-
dopa
Nightingale 1986
Gottlob 1987
Peppe 1995
Contrast Sensitivity
abnormal
orientation selectivity
low spatial freq
deficit for horizontal gratings
distorted CS: flat peak
reversed by L-dopa
CS abnl but no symptoms
Bulens1986 Hutton 1993
Regan 1987
Trick 1991
Bodis Wollner 1987
Mendez 1990
Spatial orientation
deficits in several tasks
Levin 1990
Motion discrimination
impaired thresholds
Trick
Flicker Sensitivity
decrease in peak sensitivity
Bodis-Wollner 1987
Color
blur for colored stimuli
shortened color fusion time
higher error on D15
reduced sensitivity to blue
color VEP abnl
Price 1992
Buttner 1993
Haug 1995
Barbata 1994
Visuospatial attention
normal attention, slow response
Bennett 1995
Face Perception
perceive/imagine expression
Jacobs 1995
Hallucinations
in older pts
on medications
Inzelberg 1998i