Size and shape of receptive fields in the medial superior temporal area (MST) of the macaque

NINETY-ONE single units were recorded in area MSTd of anesthetized and paralyzed macaques. Receptive fields (RFs) were mapped quantitatively using small patches of moving random dots in 25 different positions (the two-dimensional position test, or P2D). The dimensions of the receptive fields (RFs) were estimated by fitting P2D data with a generalized Gaussian function. The half-height areas of the RFs in MSTd were found to average 1085 deg2 and were not dependent upon eccentricity, in contrast to those in MT/V5 (n = 295) which averaged 31 deg2 at the fovea but at the periphery approached the RFs of MSTd in size. The RFs of some MSTd neurons extended 30–40° into the ipsilateral hemifield. In comparison, the overlap was only 10–15° in area MT/V5.

[1]  S. Zeki.  Representation of central visual fields in prestriate cortex of monkey. , 1969, Brain research.

[2]  F. Gallyas.  Silver staining of myelin by means of physical development. , 1979, Neurological research.

[3]  John H. R. Maunsell,et al.  The middle temporal visual area in the macaque: Myeloarchitecture, connections, functional properties and topographic organization , 1981, The Journal of comparative neurology.

[4]  C. Gross,et al.  Visual topography of striate projection zone (MT) in posterior superior temporal sulcus of the macaque. , 1981, Journal of neurophysiology.

[5]  John H. R. Maunsell,et al.  The connections of the middle temporal visual area (MT) and their relationship to a cortical hierarchy in the macaque monkey , 1983, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[6]  W. Newsome,et al.  Motion selectivity in macaque visual cortex. II. Spatiotemporal range of directional interactions in MT and V1. , 1986, Journal of neurophysiology.

[7]  John H. R. Maunsell,et al.  Topographic organization of the middle temporal visual area in the macaque monkey: Representational biases and the relationship to callosal connections and myeloarchitectonic boundaries , 1987, The Journal of comparative neurology.

[8]  K. Tanaka,et al.  Underlying mechanisms of the response specificity of expansion/contraction and rotation cells in the dorsal part of the medial superior temporal area of the macaque monkey. , 1989, Journal of neurophysiology.

[9]  R. Wurtz,et al.  Sensitivity of MST neurons to optic flow stimuli. II. Mechanisms of response selectivity revealed by small-field stimuli. , 1991, Journal of neurophysiology.

[10]  R. Wurtz,et al.  Sensitivity of MST neurons to optic flow stimuli. I. A continuum of response selectivity to large-field stimuli. , 1991, Journal of neurophysiology.

[11]  W. Newsome,et al.  Neuronal and psychophysical sensitivity to motion signals in extrastriate area MST of the macaque monkey , 1994, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[12]  M. Graziano,et al.  Tuning of MST neurons to spiral motions , 1994, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[13]  R A Andersen,et al.  The Analysis of Complex Motion Patterns by Form/Cue Invariant MSTd Neurons , 1996, The Journal of Neuroscience.

[14]  G. Plourde,et al.  Unintentional intraoperative awareness during sufentanil anaesthesia for cardiac surgery , 1996, Canadian journal of anaesthesia = Journal canadien d'anesthesie.