Two motion systems with common and separate pathways for color and luminance.

AUTOR(ES)

Gorea, A

RESUMO

We present psychological experiments that reveal two motion systems, a specific and an unspecific one. The specific system prevails at medium to high temporal frequencies. It comprises at least two separate motion pathways that are selective for color and for luminance and that do not interact until after the motion signal is extracted separately in each. By contrast, the unspecific system prevails at low temporal frequencies and it combines color and luminance signals at an earlier stage, before motion extraction. The successful implementation of an efficient and accurate technique for assessing equiluminance corroborates further the main findings. These results offer a general framework for understanding the nature of interactions between color and luminance signals in motion perception and suggest that previously proposed dichotomies in motion processing may be encompassed by the specific/unspecific dichotomy proposed here.

Documentos Relacionados

• Contribution of human short-wave cones to luminance and motion detection.
• Psychophysical evidence for fast region-based segmentation processes in motion and color.
• INACTIVATION OF ENDOTOXIN BY A HUMORAL COMPONENT. VI. TWO SEPARATE SYSTEMS REQUIRED FOR VIABLE AND KILLED SALMONELLA TYPHOSA
• Calpain-Mediated Bid Cleavage and Calpain-Independent Bak Modulation: Two Separate Pathways in Cisplatin-Induced Apoptosis
• Two distinct regions of FC gamma RI initiate separate signalling pathways involved in endocytosis and phagocytosis.