Medial Superior Temporal
abbreviation: MST
Abbreviation
MST
Species
Macaque
Description of part
MST was originally identified as the region receiving direct inputs from MT and lying near the fundus of the STS (Maunsell and Van Essen, 1983). As initially defined, however, MST is not a homogeneous region. There is now evidence for splitting it into 3 distinct areas: a dorsal region (MSTd), a "lateral" region (MST1) that is situated ventro-antero-lateral to MSTd, and a region situated even further ventro- antero-laterally in the floor of the superior temporal sulcus (FST), which lies within the temporal lobe but which we consider here because of its affinity with the MST complex. This partitioning is based on findings of (1) different receptive field properties in all 3 regions (Desimone and Ungerleider, 1986; Hikosaka et al., 1988; Komatsu and Wurtz, 1988a,b; Newsome et al., 1988), (2) different connections of all 3 areas (Ungerleider and Desimone, 1986b; Andersen et al., 1990; Boussaoud et al., 1990), and (3) differential effects on pursuit eye movements from selective stimulation of MSTd versus MST1 (Komatsu and Wurtz, 1989).
Part type
gray matter
Nomenclature
Felleman & van Essen
Endorsement
The approach used by the collator Mihail Bota is not endorsed by the author of the nomenclature.
