The effects of bilateral removal of inferotemporal cortex or lateral striate cortex are compared. The former operation impairs visual pattern discrimination learning, without disturbing prompt detection and retrieval of food, visual acuity or visual fields. In contrast, animals in which the macular striate projection area has been removed are significantly superior in tests of visual pattern discrimination learning despite showing impairment of visually guided reaching, visual acuity, and visual fields. The results indicate that the inferotemporal defect is not caused by deficient visual sensitivity or acuity.
Get full access to this article
View all access options for this article.
References
1.
BufferyA. W. H. (1964). The Effects of Frontal and Temporal Lobe Lesions upon the Behaviour of BaboonsUniversity of Cambridge Ph.D. thesis.
2.
ButterC. M.GekorskiW. L. (1966). Alterations in pattern equivalence following inferotemporal and lateral striate lesions in rhesus monkeys. J. comp. physiol. Psychol.61, 309–12.
3.
ButterC. M.MishkinM.RosvoldH. E. (1965). Stimulus generalization in monkeys with inferotemporal and lateral occipital lesions. Stimulus GeneralizationMostofskyD. J.Stanford: Stanford University Press.
4.
ChowK. L. (1954). Effects of temporal and neocortical ablation on visual discrimination learning sets in monkeys. J. comp. physiol. Psychol.47, 194–8.
5.
ChowK. L.SurvisJ. (1958). Retention of voerlearned visual habit after cortical ablation in monkey. Arch. Neurol. Psychiat.79, 640–6.
6.
CoweyA. (1967). Perimetric study of visual field defects in monkeys after striate cortex and retinal ablations. Quart. J. exp. Psychol.19, 232–45.
7.
CoweyA.WeiskrantzL. (1961). Role of experience in misreaching caused by striate cortex lesions. Nature192, 1319.
8.
CoweyA.WeiskrantzL. (1963). A perimetric study of visual field defects in monkeys. Quart. J. exp. Psychol.15, 91–115.
9.
DiamondI. T.ChowK. L. (1962). Biological psychology. Psychology: A study of a ScienceKochS.New York: McGraw-Hill Vol. IV.
10.
GoldsteinK. (1942). After Effects of Brain Injuries in WarNew York: Greene and Stratton.
11.
IversenS. D.WeiskrantzL. (1964). Temporal lobe lesions and memory in the monkey. Nature201, 740–2.
12.
IversenS. D.WeiskrantzL. (1967). Perception of redundant cues by monkeys with inferotemporal lesions. Nature214, 241–3.
13.
MishkinM. (1954). Visual discrimination performance following partial ablations of the temporal lobe. II. Ventral surface vs. hippocampus. J. comp. physiol. Psychol.48, 97–101.
14.
MishkinM.PribramK. H. (1954). Visual discrimination performence following partial ablations of the temporal lobe. I. Ventral vs. lateral. J. comp. physiol. Psychol.47, 14–20.
15.
MishkinM.WeiskrantzL. (1959). Effects of cortical lesions in monkeys on flicker fusion frequency. J. comp. physiol. Psychol.52, 660–6.
16.
OrbachJ.FantzR. L. (1958). Differential effects of temporal neocortical resections on overtrained and non-overtrained visual habits in monkeys. J. comp. physiol. Psychol.51, 126–9.
17.
PasikP.PasikT.BattersbyW. S.BenderM. B. (1958). Visual and tactual discriminations by macaques with serial temporal and parietal lesions. J. comp. physiol. Psychol.51, 427–36.
18.
PasikT.PaskiP.BattersbyW. S.BenderM. B. (1960). Factors influencing visual behavior of monkeys with temporal lobe lesions. J. comp. Neurol.115, 89–102.
19.
PribramH. B.BarryJ. (1956). Further behavioral analysis of parieto-temporo-preoccipital cortex. J. Neurophysiol.19, 99–106.
20.
ValciukasJ. A.PasikP. (1965). Influence of illumination on pattern discrimination thresholds in monkeys with temporal lobe lesions. Fed. Proc.24, No. 2, Part 1274.
21.
WeiskrantzL.CoweyA. (1963). Striate cortex lesions and visual acuity of the rhesus monkey. J. comp. physiol. Psychol.56, 225–31.
22.
WilsonM. (1957). Effects of circumscribed cortical lesions upon somesthetic and visual discrimination in the monkey. J. comp. physiol. Psychol.50, 630–5.
23.
WilsonW. A.MishkinM. (1959). Comparison of the effects of inferotemporal and lateral occipital lesions on visually guided behavior in monkeys. J. comp. physiol. Psychol.52, 10–7.
