The human retina produces a tuned response to stimuli of increasing spatial frequency reversed at a steady state. The peak amplitude response, at medium spatial frequencies, is decreased in Parkinson's disease and in normal subjects (n = 18) treated with a D2 dopaminergic antagonist (l-sulpiride). Here, we report that a mixed D1-D2 receptor antagonist (haloperidol) in normal subjects (n = 18) does not produce an amplitude decrease of medium spatial frequencies (SFs) responses but it decreases low-frequency response. It could argued that the increased dopamine release produced by the presynaptic D2 antagonistic action of haloperidol is subsequently counteracted at postsynaptic level by its D1 antagonistic effect, producing a net counterbalance at medium SFs. These data suggest that the two dopamine receptors may play different roles in the retinal function and in the origin of visual alterations in Parkinson's disease.

Stanzione, P., Bodis Wollner, I., Pierantozzi, M., Semprini, R., Tagliati, M., Peppe, A., et al. (1999). A mixed D1 and D2 antagonist does not replay pattern electroretinogram alterations observed with a selective D2 antagonist in normal humans: relationship with Parkinson's disease pattern electroretinogram alterations. CLINICAL NEUROPHYSIOLOGY, 110(1), 82-85.

A mixed D1 and D2 antagonist does not replay pattern electroretinogram alterations observed with a selective D2 antagonist in normal humans: relationship with Parkinson's disease pattern electroretinogram alterations

STANZIONE, PAOLO;PIERANTOZZI, MARIANGELA;BERNARDI, GIORGIO
1999-01-01

Abstract

The human retina produces a tuned response to stimuli of increasing spatial frequency reversed at a steady state. The peak amplitude response, at medium spatial frequencies, is decreased in Parkinson's disease and in normal subjects (n = 18) treated with a D2 dopaminergic antagonist (l-sulpiride). Here, we report that a mixed D1-D2 receptor antagonist (haloperidol) in normal subjects (n = 18) does not produce an amplitude decrease of medium spatial frequencies (SFs) responses but it decreases low-frequency response. It could argued that the increased dopamine release produced by the presynaptic D2 antagonistic action of haloperidol is subsequently counteracted at postsynaptic level by its D1 antagonistic effect, producing a net counterbalance at medium SFs. These data suggest that the two dopamine receptors may play different roles in the retinal function and in the origin of visual alterations in Parkinson's disease.
gen-1999
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore MED/26 - NEUROLOGIA
English
Haloperidol; Sulpiride; Reference Values; Parkinson Disease; Humans; Electroencephalography; Adult; Brain; Electroretinography
Stanzione, P., Bodis Wollner, I., Pierantozzi, M., Semprini, R., Tagliati, M., Peppe, A., et al. (1999). A mixed D1 and D2 antagonist does not replay pattern electroretinogram alterations observed with a selective D2 antagonist in normal humans: relationship with Parkinson's disease pattern electroretinogram alterations. CLINICAL NEUROPHYSIOLOGY, 110(1), 82-85.
Stanzione, P; Bodis Wollner, I; Pierantozzi, M; Semprini, R; Tagliati, M; Peppe, A; Bernardi, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/99471
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