Research article summary:

Fundamental mechanisms of visual motion detection: models, cells and functions.

Abstract Extract:
Taking a comparative approach, data from a range of visual species are discussed in the context of ideas about mechanisms of motion detection. The cellular basis of motion detection in the vertebrate retina, sub-cortical structures and visual cortex is ... (Full abstract text below)

Published 2002Dec in Journal: Prog Neurobiol (Language : eng)

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1. Prog Neurobiol. 2002 Dec;68(6):409-37

Fundamental mechanisms of visual motion detection: models, cells and functions.

Clifford CW, Ibbotson MR

Colour, Form and Motion Laboratory, Visual Perception Unit, School of Psychology, The University of Sydney, Sydney 2006, NSW, Australia. colinc@psych.usyd.edu.au

Taking a comparative approach, data from a range of visual species are discussed in the context of ideas about mechanisms of motion detection. The cellular basis of motion detection in the vertebrate retina, sub-cortical structures and visual cortex is reviewed alongside that of the insect optic lobes. Special care is taken to relate concepts from theoretical models to the neural circuitry in biological systems. Motion detection involves spatiotemporal pre-filters, temporal delay filters and non-linear interactions. A number of different types of non-linear mechanism such as facilitation, inhibition and division have been proposed to underlie direction selectivity. The resulting direction-selective mechanisms can be combined to produce speed-tuned motion detectors. Motion detection is a dynamic process with adaptation as a fundamental property. The behavior of adaptive mechanisms in motion detection is discussed, focusing on the informational basis of motion adaptation, its phenomenology in human vision, and its cellular basis. The question of whether motion adaptation serves a function or is simply the result of neural fatigue is critically addressed.

PMID : 12576294 [PubMed - Indexed for MEDLINE]

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Full Author Information

First Name	LastName	Initials
C W G	Clifford	CW
M R	Ibbotson	MR

Affiliation: Colour, Form and Motion Laboratory, Visual Perception Unit, School of Psychology, The University of Sydney, Sydney 2006, NSW, Australia. colinc@psych.usyd.edu.au

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